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id="toc-Istoric-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Proprietăți" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Proprietăți"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Proprietăți</span> </div> </a> <button aria-controls="toc-Proprietăți-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Proprietăți subsection</span> </button> <ul id="toc-Proprietăți-sublist" class="vector-toc-list"> <li id="toc-Fizice" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Fizice"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Fizice</span> </div> </a> <ul id="toc-Fizice-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Chimice" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Chimice"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Chimice</span> </div> </a> <ul id="toc-Chimice-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Compuși" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Compuși"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>Compuși</span> </div> </a> <ul id="toc-Compuși-sublist" class="vector-toc-list"> <li id="toc-Compuși_complecși" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Compuși_complecși"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3.1</span> <span>Compuși complecși</span> </div> </a> <ul id="toc-Compuși_complecși-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Compuși_halogenați" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Compuși_halogenați"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3.2</span> <span>Compuși halogenați</span> </div> </a> <ul id="toc-Compuși_halogenați-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Oxizi" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Oxizi"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3.3</span> <span>Oxizi</span> </div> </a> <ul id="toc-Oxizi-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Izotopi" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Izotopi"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.4</span> <span>Izotopi</span> </div> </a> <ul id="toc-Izotopi-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Abundență_naturală" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Abundență_naturală"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.5</span> <span>Abundență naturală</span> </div> </a> <ul id="toc-Abundență_naturală-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Producție" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Producție"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Producție</span> </div> </a> <ul id="toc-Producție-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Aplicații" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Aplicații"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Aplicații</span> </div> </a> <button aria-controls="toc-Aplicații-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Aplicații subsection</span> </button> <ul id="toc-Aplicații-sublist" class="vector-toc-list"> <li id="toc-Forări_petroliere" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Forări_petroliere"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Forări petroliere</span> </div> </a> <ul id="toc-Forări_petroliere-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Generator_de_energie_și_putere" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Generator_de_energie_și_putere"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2</span> <span>Generator de energie și putere</span> </div> </a> <ul id="toc-Generator_de_energie_și_putere-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Fluidele_de_centrifugare" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Fluidele_de_centrifugare"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.3</span> <span>Fluidele de centrifugare</span> </div> </a> <ul id="toc-Fluidele_de_centrifugare-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Utilizări_chimice_și_medicale" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Utilizări_chimice_și_medicale"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.4</span> <span>Utilizări chimice și medicale</span> </div> </a> <ul id="toc-Utilizări_chimice_și_medicale-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Aplicațiile_nucleare_și_aplicațiile_izotopilor" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Aplicațiile_nucleare_și_aplicațiile_izotopilor"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.5</span> <span>Aplicațiile nucleare și aplicațiile izotopilor</span> </div> </a> <ul id="toc-Aplicațiile_nucleare_și_aplicațiile_izotopilor-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Hazard" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Hazard"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Hazard</span> </div> </a> <ul id="toc-Hazard-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Vezi_și" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Vezi_și"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Vezi și</span> </div> </a> <ul id="toc-Vezi_și-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Note" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Note"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Note</span> </div> </a> <ul id="toc-Note-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Referințe" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referințe"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Referințe</span> </div> </a> <ul id="toc-Referințe-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bibliografie" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bibliografie"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Bibliografie</span> </div> </a> <ul id="toc-Bibliografie-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Legături_externe" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Legături_externe"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>Legături externe</span> </div> </a> <ul id="toc-Legături_externe-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Cuprins" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table of Contents" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Comută cuprinsul" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Comută cuprinsul</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Cesiu</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Mergeți la un articol în altă limbă. Disponibil în 148 limbi" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-148" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">148 limbi</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Sesium" title="Sesium – afrikaans" lang="af" hreflang="af" data-title="Sesium" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-am mw-list-item"><a href="https://am.wikipedia.org/wiki/%E1%88%B4%E1%88%B2%E1%8B%A8%E1%88%9D" title="ሴሲየም – amharică" lang="am" hreflang="am" data-title="ሴሲየም" data-language-autonym="አማርኛ" data-language-local-name="amharică" class="interlanguage-link-target"><span>አማርኛ</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Cesio" title="Cesio – aragoneză" lang="an" hreflang="an" data-title="Cesio" data-language-autonym="Aragonés" data-language-local-name="aragoneză" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-anp mw-list-item"><a href="https://anp.wikipedia.org/wiki/%E0%A4%B8%E0%A5%80%E0%A4%9C%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="सीजियम – angika" lang="anp" hreflang="anp" data-title="सीजियम" data-language-autonym="अंगिका" data-language-local-name="angika" class="interlanguage-link-target"><span>अंगिका</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B3%D9%8A%D8%B2%D9%8A%D9%88%D9%85" title="سيزيوم – arabă" lang="ar" hreflang="ar" data-title="سيزيوم" data-language-autonym="العربية" data-language-local-name="arabă" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D8%B3%D9%8A%D8%B2%D9%8A%D9%88%D9%85" title="سيزيوم – Moroccan Arabic" lang="ary" hreflang="ary" data-title="سيزيوم" data-language-autonym="الدارجة" data-language-local-name="Moroccan Arabic" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%B3%D9%8A%D8%B2%D9%8A%D9%88%D9%85" title="سيزيوم – Egyptian Arabic" lang="arz" hreflang="arz" data-title="سيزيوم" data-language-autonym="مصرى" data-language-local-name="Egyptian Arabic" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Cesiu" title="Cesiu – asturiană" lang="ast" hreflang="ast" data-title="Cesiu" data-language-autonym="Asturianu" data-language-local-name="asturiană" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Sezium" title="Sezium – azeră" lang="az" hreflang="az" data-title="Sezium" data-language-autonym="Azərbaycanca" data-language-local-name="azeră" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8%D0%B9" title="Цезий – bașkiră" lang="ba" hreflang="ba" data-title="Цезий" data-language-autonym="Башҡортса" data-language-local-name="bașkiră" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-ban mw-list-item"><a href="https://ban.wikipedia.org/wiki/S%C3%A9sium" title="Sésium – balineză" lang="ban" hreflang="ban" data-title="Sésium" data-language-autonym="Basa Bali" data-language-local-name="balineză" class="interlanguage-link-target"><span>Basa Bali</span></a></li><li class="interlanguage-link interwiki-bcl mw-list-item"><a href="https://bcl.wikipedia.org/wiki/Sesyo" title="Sesyo – Central Bikol" lang="bcl" hreflang="bcl" data-title="Sesyo" data-language-autonym="Bikol Central" data-language-local-name="Central Bikol" class="interlanguage-link-target"><span>Bikol Central</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A6%D1%8D%D0%B7%D1%96%D0%B9" title="Цэзій – belarusă" lang="be" hreflang="be" data-title="Цэзій" data-language-autonym="Беларуская" data-language-local-name="belarusă" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%A6%D1%8D%D0%B7" title="Цэз – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Цэз" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8%D0%B9" title="Цезий – bulgară" lang="bg" hreflang="bg" data-title="Цезий" data-language-autonym="Български" data-language-local-name="bulgară" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bh mw-list-item"><a href="https://bh.wikipedia.org/wiki/%E0%A4%B8%E0%A5%80%E0%A4%9C%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="सीजियम – Bhojpuri" lang="bh" hreflang="bh" data-title="सीजियम" data-language-autonym="भोजपुरी" data-language-local-name="Bhojpuri" class="interlanguage-link-target"><span>भोजपुरी</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%B8%E0%A6%BF%E0%A6%9C%E0%A6%BF%E0%A6%AF%E0%A6%BC%E0%A6%BE%E0%A6%AE" title="সিজিয়াম – bengaleză" lang="bn" hreflang="bn" data-title="সিজিয়াম" data-language-autonym="বাংলা" data-language-local-name="bengaleză" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bo mw-list-item"><a href="https://bo.wikipedia.org/wiki/%E0%BD%A6%E0%BE%B0%E0%BD%BA%E0%BC%8B%E0%BD%A6%E0%BD%B2%E0%BD%98%E0%BC%8D" title="སྰེ་སིམ། – tibetană" lang="bo" hreflang="bo" data-title="སྰེ་སིམ།" data-language-autonym="བོད་ཡིག" data-language-local-name="tibetană" class="interlanguage-link-target"><span>བོད་ཡིག</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Keziom" title="Keziom – bretonă" lang="br" hreflang="br" data-title="Keziom" data-language-autonym="Brezhoneg" data-language-local-name="bretonă" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Cezij" title="Cezij – bosniacă" lang="bs" hreflang="bs" data-title="Cezij" data-language-autonym="Bosanski" data-language-local-name="bosniacă" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Cesi" title="Cesi – catalană" lang="ca" hreflang="ca" data-title="Cesi" data-language-autonym="Català" data-language-local-name="catalană" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/Caesium" title="Caesium – Mindong" lang="cdo" hreflang="cdo" data-title="Caesium" data-language-autonym="閩東語 / Mìng-dĕ̤ng-ngṳ̄" data-language-local-name="Mindong" class="interlanguage-link-target"><span>閩東語 / Mìng-dĕ̤ng-ngṳ̄</span></a></li><li class="interlanguage-link interwiki-ceb mw-list-item"><a href="https://ceb.wikipedia.org/wiki/Cesyo" title="Cesyo – cebuană" lang="ceb" hreflang="ceb" data-title="Cesyo" data-language-autonym="Cebuano" data-language-local-name="cebuană" class="interlanguage-link-target"><span>Cebuano</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%B3%DB%8C%D8%B2%DB%8C%DB%86%D9%85" title="سیزیۆم – kurdă centrală" lang="ckb" hreflang="ckb" data-title="سیزیۆم" data-language-autonym="کوردی" data-language-local-name="kurdă centrală" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-co mw-list-item"><a href="https://co.wikipedia.org/wiki/Cesiu" title="Cesiu – corsicană" lang="co" hreflang="co" data-title="Cesiu" data-language-autonym="Corsu" data-language-local-name="corsicană" class="interlanguage-link-target"><span>Corsu</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Cesium" title="Cesium – cehă" lang="cs" hreflang="cs" data-title="Cesium" data-language-autonym="Čeština" data-language-local-name="cehă" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8%D0%B9" title="Цезий – ciuvașă" lang="cv" hreflang="cv" data-title="Цезий" data-language-autonym="Чӑвашла" data-language-local-name="ciuvașă" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Cesiwm" title="Cesiwm – galeză" lang="cy" hreflang="cy" data-title="Cesiwm" data-language-autonym="Cymraeg" data-language-local-name="galeză" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/C%C3%A6sium" title="Cæsium – daneză" lang="da" hreflang="da" data-title="Cæsium" data-language-autonym="Dansk" data-language-local-name="daneză" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de badge-Q17437796 badge-featuredarticle mw-list-item" title="articol de calitate"><a href="https://de.wikipedia.org/wiki/Caesium" title="Caesium – germană" lang="de" hreflang="de" data-title="Caesium" data-language-autonym="Deutsch" data-language-local-name="germană" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%9A%CE%B1%CE%AF%CF%83%CE%B9%CE%BF" title="Καίσιο – greacă" lang="el" hreflang="el" data-title="Καίσιο" data-language-autonym="Ελληνικά" data-language-local-name="greacă" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en badge-Q17437796 badge-featuredarticle mw-list-item" title="articol de calitate"><a href="https://en.wikipedia.org/wiki/Caesium" title="Caesium – engleză" lang="en" hreflang="en" data-title="Caesium" data-language-autonym="English" data-language-local-name="engleză" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Cezio" title="Cezio – esperanto" lang="eo" hreflang="eo" data-title="Cezio" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Cesio" title="Cesio – spaniolă" lang="es" hreflang="es" data-title="Cesio" data-language-autonym="Español" data-language-local-name="spaniolă" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Tseesium" title="Tseesium – estonă" lang="et" hreflang="et" data-title="Tseesium" data-language-autonym="Eesti" data-language-local-name="estonă" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Zesio" title="Zesio – bască" lang="eu" hreflang="eu" data-title="Zesio" data-language-autonym="Euskara" data-language-local-name="bască" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B3%D8%B2%DB%8C%D9%85" title="سزیم – persană" lang="fa" hreflang="fa" data-title="سزیم" data-language-autonym="فارسی" data-language-local-name="persană" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi badge-Q17559452 badge-recommendedarticle mw-list-item" title="articol recomandat"><a href="https://fi.wikipedia.org/wiki/Cesium" title="Cesium – finlandeză" lang="fi" hreflang="fi" data-title="Cesium" data-language-autonym="Suomi" data-language-local-name="finlandeză" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fo mw-list-item"><a href="https://fo.wikipedia.org/wiki/Sesium" title="Sesium – feroeză" lang="fo" hreflang="fo" data-title="Sesium" data-language-autonym="Føroyskt" data-language-local-name="feroeză" class="interlanguage-link-target"><span>Føroyskt</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/C%C3%A9sium" title="Césium – franceză" lang="fr" hreflang="fr" data-title="Césium" data-language-autonym="Français" data-language-local-name="franceză" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Tseesium" title="Tseesium – frizonă nordică" lang="frr" hreflang="frr" data-title="Tseesium" data-language-autonym="Nordfriisk" data-language-local-name="frizonă nordică" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-fur mw-list-item"><a href="https://fur.wikipedia.org/wiki/Cesi" title="Cesi – friulană" lang="fur" hreflang="fur" data-title="Cesi" data-language-autonym="Furlan" data-language-local-name="friulană" class="interlanguage-link-target"><span>Furlan</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Caeisiam" title="Caeisiam – irlandeză" lang="ga" hreflang="ga" data-title="Caeisiam" data-language-autonym="Gaeilge" data-language-local-name="irlandeză" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gan mw-list-item"><a href="https://gan.wikipedia.org/wiki/%E9%8A%AB" title="銫 – chineză gan" lang="gan" hreflang="gan" data-title="銫" data-language-autonym="贛語" data-language-local-name="chineză gan" class="interlanguage-link-target"><span>贛語</span></a></li><li class="interlanguage-link interwiki-gd mw-list-item"><a href="https://gd.wikipedia.org/wiki/Caesium" title="Caesium – gaelică scoțiană" lang="gd" hreflang="gd" data-title="Caesium" data-language-autonym="Gàidhlig" data-language-local-name="gaelică scoțiană" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl badge-Q17437796 badge-featuredarticle mw-list-item" title="articol de calitate"><a href="https://gl.wikipedia.org/wiki/Cesio" title="Cesio – galiciană" lang="gl" hreflang="gl" data-title="Cesio" data-language-autonym="Galego" data-language-local-name="galiciană" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gu mw-list-item"><a href="https://gu.wikipedia.org/wiki/%E0%AA%B8%E0%AB%80%E0%AA%B8%E0%AB%80%E0%AA%AF%E0%AA%AE" title="સીસીયમ – gujarati" lang="gu" hreflang="gu" data-title="સીસીયમ" data-language-autonym="ગુજરાતી" data-language-local-name="gujarati" class="interlanguage-link-target"><span>ગુજરાતી</span></a></li><li class="interlanguage-link interwiki-gv mw-list-item"><a href="https://gv.wikipedia.org/wiki/Kaishum" title="Kaishum – manx" lang="gv" hreflang="gv" data-title="Kaishum" data-language-autonym="Gaelg" data-language-local-name="manx" class="interlanguage-link-target"><span>Gaelg</span></a></li><li class="interlanguage-link interwiki-hak mw-list-item"><a href="https://hak.wikipedia.org/wiki/Caesium" title="Caesium – chineză hakka" lang="hak" hreflang="hak" data-title="Caesium" data-language-autonym="客家語 / Hak-kâ-ngî" data-language-local-name="chineză hakka" class="interlanguage-link-target"><span>客家語 / Hak-kâ-ngî</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A6%D7%A1%D7%99%D7%95%D7%9D" title="צסיום – ebraică" lang="he" hreflang="he" data-title="צסיום" data-language-autonym="עברית" data-language-local-name="ebraică" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B8%E0%A5%80%E0%A4%9C%E0%A4%BC%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="सीज़ियम – hindi" lang="hi" hreflang="hi" data-title="सीज़ियम" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hif mw-list-item"><a href="https://hif.wikipedia.org/wiki/Caesium" title="Caesium – Fiji Hindi" lang="hif" hreflang="hif" data-title="Caesium" data-language-autonym="Fiji Hindi" data-language-local-name="Fiji Hindi" class="interlanguage-link-target"><span>Fiji Hindi</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Cezij" title="Cezij – croată" lang="hr" hreflang="hr" data-title="Cezij" data-language-autonym="Hrvatski" data-language-local-name="croată" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Sezy%C3%B2m" title="Sezyòm – haitiană" lang="ht" hreflang="ht" data-title="Sezyòm" data-language-autonym="Kreyòl ayisyen" data-language-local-name="haitiană" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/C%C3%A9zium" title="Cézium – maghiară" lang="hu" hreflang="hu" data-title="Cézium" data-language-autonym="Magyar" data-language-local-name="maghiară" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%91%D5%A5%D5%A6%D5%AB%D5%B8%D6%82%D5%B4" title="Ցեզիում – armeană" lang="hy" hreflang="hy" data-title="Ցեզիում" data-language-autonym="Հայերեն" data-language-local-name="armeană" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Cesium" title="Cesium – interlingua" lang="ia" hreflang="ia" data-title="Cesium" data-language-autonym="Interlingua" data-language-local-name="interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Sesium" title="Sesium – indoneziană" lang="id" hreflang="id" data-title="Sesium" data-language-autonym="Bahasa Indonesia" data-language-local-name="indoneziană" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Cesio" title="Cesio – ido" lang="io" hreflang="io" data-title="Cesio" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Ses%C3%ADn" title="Sesín – islandeză" lang="is" hreflang="is" data-title="Sesín" data-language-autonym="Íslenska" data-language-local-name="islandeză" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Cesio" title="Cesio – italiană" lang="it" hreflang="it" data-title="Cesio" data-language-autonym="Italiano" data-language-local-name="italiană" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja badge-Q17437798 badge-goodarticle mw-list-item" title="articol bun"><a href="https://ja.wikipedia.org/wiki/%E3%82%BB%E3%82%B7%E3%82%A6%E3%83%A0" title="セシウム – japoneză" lang="ja" hreflang="ja" data-title="セシウム" data-language-autonym="日本語" data-language-local-name="japoneză" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-jbo mw-list-item"><a href="https://jbo.wikipedia.org/wiki/blasodna" title="blasodna – lojban" lang="jbo" hreflang="jbo" data-title="blasodna" data-language-autonym="La .lojban." data-language-local-name="lojban" class="interlanguage-link-target"><span>La .lojban.</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/S%C3%A9sium" title="Sésium – javaneză" lang="jv" hreflang="jv" data-title="Sésium" data-language-autonym="Jawa" data-language-local-name="javaneză" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%AA%E1%83%94%E1%83%96%E1%83%98%E1%83%A3%E1%83%9B%E1%83%98" title="ცეზიუმი – georgiană" lang="ka" hreflang="ka" data-title="ცეზიუმი" data-language-autonym="ქართული" data-language-local-name="georgiană" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kbp mw-list-item"><a href="https://kbp.wikipedia.org/wiki/S%C9%9Bz%C9%A9y%C9%94m" title="Sɛzɩyɔm – Kabiye" lang="kbp" hreflang="kbp" data-title="Sɛzɩyɔm" data-language-autonym="Kabɩyɛ" data-language-local-name="Kabiye" class="interlanguage-link-target"><span>Kabɩyɛ</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8%D0%B9" title="Цезий – kazahă" lang="kk" hreflang="kk" data-title="Цезий" data-language-autonym="Қазақша" data-language-local-name="kazahă" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%B8%E0%B3%80%E0%B2%B8%E0%B2%BF%E0%B2%AF%E0%B2%AE%E0%B3%8D" title="ಸೀಸಿಯಮ್ – kannada" lang="kn" hreflang="kn" data-title="ಸೀಸಿಯಮ್" data-language-autonym="ಕನ್ನಡ" data-language-local-name="kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%84%B8%EC%8A%98" title="세슘 – coreeană" lang="ko" hreflang="ko" data-title="세슘" data-language-autonym="한국어" data-language-local-name="coreeană" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Sezy%C3%BBm" title="Sezyûm – kurdă" lang="ku" hreflang="ku" data-title="Sezyûm" data-language-autonym="Kurdî" data-language-local-name="kurdă" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-kv mw-list-item"><a href="https://kv.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8%D0%B9" title="Цезий – komi" lang="kv" hreflang="kv" data-title="Цезий" data-language-autonym="Коми" data-language-local-name="komi" class="interlanguage-link-target"><span>Коми</span></a></li><li class="interlanguage-link interwiki-kw mw-list-item"><a href="https://kw.wikipedia.org/wiki/Cesiom" title="Cesiom – cornică" lang="kw" hreflang="kw" data-title="Cesiom" data-language-autonym="Kernowek" data-language-local-name="cornică" class="interlanguage-link-target"><span>Kernowek</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8%D0%B9" title="Цезий – kârgâză" lang="ky" hreflang="ky" data-title="Цезий" data-language-autonym="Кыргызча" data-language-local-name="kârgâză" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Caesium" title="Caesium – latină" lang="la" hreflang="la" data-title="Caesium" data-language-autonym="Latina" data-language-local-name="latină" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/C%C3%A4sium" title="Cäsium – luxemburgheză" lang="lb" hreflang="lb" data-title="Cäsium" data-language-autonym="Lëtzebuergesch" data-language-local-name="luxemburgheză" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lg mw-list-item"><a href="https://lg.wikipedia.org/wiki/Seziyaamu_(Cesium)" title="Seziyaamu (Cesium) – ganda" lang="lg" hreflang="lg" data-title="Seziyaamu (Cesium)" data-language-autonym="Luganda" data-language-local-name="ganda" class="interlanguage-link-target"><span>Luganda</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Cesium" title="Cesium – limburgheză" lang="li" hreflang="li" data-title="Cesium" data-language-autonym="Limburgs" data-language-local-name="limburgheză" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-lij mw-list-item"><a href="https://lij.wikipedia.org/wiki/%C3%87esio_(elemento)" title="Çesio (elemento) – liguriană" lang="lij" hreflang="lij" data-title="Çesio (elemento)" data-language-autonym="Ligure" data-language-local-name="liguriană" class="interlanguage-link-target"><span>Ligure</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Cesio" title="Cesio – lombardă" lang="lmo" hreflang="lmo" data-title="Cesio" data-language-autonym="Lombard" data-language-local-name="lombardă" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Cezis" title="Cezis – lituaniană" lang="lt" hreflang="lt" data-title="Cezis" data-language-autonym="Lietuvių" data-language-local-name="lituaniană" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/C%C4%93zijs" title="Cēzijs – letonă" lang="lv" hreflang="lv" data-title="Cēzijs" data-language-autonym="Latviešu" data-language-local-name="letonă" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mdf mw-list-item"><a href="https://mdf.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8" title="Цези – moksha" lang="mdf" hreflang="mdf" data-title="Цези" data-language-autonym="Мокшень" data-language-local-name="moksha" class="interlanguage-link-target"><span>Мокшень</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8%D1%83%D0%BC" title="Цезиум – macedoneană" lang="mk" hreflang="mk" data-title="Цезиум" data-language-autonym="Македонски" data-language-local-name="macedoneană" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%B8%E0%B5%80%E0%B4%B8%E0%B4%BF%E0%B4%AF%E0%B4%82" title="സീസിയം – malayalam" lang="ml" hreflang="ml" data-title="സീസിയം" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8" title="Цези – mongolă" lang="mn" hreflang="mn" data-title="Цези" data-language-autonym="Монгол" data-language-local-name="mongolă" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%B8%E0%A4%BF%E0%A4%9D%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="सिझियम – marathi" lang="mr" hreflang="mr" data-title="सिझियम" data-language-autonym="मराठी" data-language-local-name="marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-mrj mw-list-item"><a href="https://mrj.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8%D0%B9" title="Цезий – Western Mari" lang="mrj" hreflang="mrj" data-title="Цезий" data-language-autonym="Кырык мары" data-language-local-name="Western Mari" class="interlanguage-link-target"><span>Кырык мары</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Sesium" title="Sesium – malaeză" lang="ms" hreflang="ms" data-title="Sesium" data-language-autonym="Bahasa Melayu" data-language-local-name="malaeză" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%86%E1%80%9A%E1%80%BA%E1%80%86%E1%80%AE%E1%80%9A%E1%80%99%E1%80%BA" title="ဆယ်ဆီယမ် – birmană" lang="my" hreflang="my" data-title="ဆယ်ဆီယမ်" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="birmană" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/C%C3%A4sium" title="Cäsium – germana de jos" lang="nds" hreflang="nds" data-title="Cäsium" data-language-autonym="Plattdüütsch" data-language-local-name="germana de jos" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-new mw-list-item"><a href="https://new.wikipedia.org/wiki/%E0%A4%B8%E0%A5%87%E0%A4%B8%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="सेसियम – newari" lang="new" hreflang="new" data-title="सेसियम" data-language-autonym="नेपाल भाषा" data-language-local-name="newari" class="interlanguage-link-target"><span>नेपाल भाषा</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Cesium" title="Cesium – neerlandeză" lang="nl" hreflang="nl" data-title="Cesium" data-language-autonym="Nederlands" data-language-local-name="neerlandeză" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Cesium" title="Cesium – norvegiană nynorsk" lang="nn" hreflang="nn" data-title="Cesium" data-language-autonym="Norsk nynorsk" data-language-local-name="norvegiană nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Cesium" title="Cesium – norvegiană bokmål" lang="nb" hreflang="nb" data-title="Cesium" data-language-autonym="Norsk bokmål" data-language-local-name="norvegiană bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nov mw-list-item"><a href="https://nov.wikipedia.org/wiki/Sesium" title="Sesium – Novial" lang="nov" hreflang="nov" data-title="Sesium" data-language-autonym="Novial" data-language-local-name="Novial" class="interlanguage-link-target"><span>Novial</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/C%C3%A8si" title="Cèsi – occitană" lang="oc" hreflang="oc" data-title="Cèsi" data-language-autonym="Occitan" data-language-local-name="occitană" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-olo mw-list-item"><a href="https://olo.wikipedia.org/wiki/Cezii" title="Cezii – Livvi-Karelian" lang="olo" hreflang="olo" data-title="Cezii" data-language-autonym="Livvinkarjala" data-language-local-name="Livvi-Karelian" class="interlanguage-link-target"><span>Livvinkarjala</span></a></li><li class="interlanguage-link interwiki-om mw-list-item"><a href="https://om.wikipedia.org/wiki/Seeziyeemii" title="Seeziyeemii – oromo" lang="om" hreflang="om" data-title="Seeziyeemii" data-language-autonym="Oromoo" data-language-local-name="oromo" class="interlanguage-link-target"><span>Oromoo</span></a></li><li class="interlanguage-link interwiki-os mw-list-item"><a href="https://os.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8%D0%B9" title="Цезий – osetă" lang="os" hreflang="os" data-title="Цезий" data-language-autonym="Ирон" data-language-local-name="osetă" class="interlanguage-link-target"><span>Ирон</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%B8%E0%A9%80%E0%A8%9C%E0%A8%BC%E0%A9%80%E0%A8%85%E0%A8%AE" title="ਸੀਜ਼ੀਅਮ – punjabi" lang="pa" hreflang="pa" data-title="ਸੀਜ਼ੀਅਮ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="punjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pi mw-list-item"><a href="https://pi.wikipedia.org/wiki/%E0%A4%B8%E0%A5%87%E0%A4%B8%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="सेसियम – pali" lang="pi" hreflang="pi" data-title="सेसियम" data-language-autonym="पालि" data-language-local-name="pali" class="interlanguage-link-target"><span>पालि</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Cez" title="Cez – poloneză" lang="pl" hreflang="pl" data-title="Cez" data-language-autonym="Polski" data-language-local-name="poloneză" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pms mw-list-item"><a href="https://pms.wikipedia.org/wiki/Cesio" title="Cesio – Piedmontese" lang="pms" hreflang="pms" data-title="Cesio" data-language-autonym="Piemontèis" data-language-local-name="Piedmontese" class="interlanguage-link-target"><span>Piemontèis</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D8%B3%DB%8C%D8%B2%DB%8C%D9%85" title="سیزیم – Western Punjabi" lang="pnb" hreflang="pnb" data-title="سیزیم" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D8%B3%DB%90%D8%B2%D9%8A%D9%88%D9%85" title="سېزيوم – paștună" lang="ps" hreflang="ps" data-title="سېزيوم" data-language-autonym="پښتو" data-language-local-name="paștună" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/C%C3%A9sio" title="Césio – portugheză" lang="pt" hreflang="pt" data-title="Césio" data-language-autonym="Português" data-language-local-name="portugheză" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/Sisyu" title="Sisyu – quechua" lang="qu" hreflang="qu" data-title="Sisyu" data-language-autonym="Runa Simi" data-language-local-name="quechua" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-roa-rup mw-list-item"><a href="https://roa-rup.wikipedia.org/wiki/Cesiu" title="Cesiu – aromână" lang="rup" hreflang="rup" data-title="Cesiu" data-language-autonym="Armãneashti" data-language-local-name="aromână" class="interlanguage-link-target"><span>Armãneashti</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8%D0%B9" title="Цезий – rusă" lang="ru" hreflang="ru" data-title="Цезий" data-language-autonym="Русский" data-language-local-name="rusă" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sa mw-list-item"><a href="https://sa.wikipedia.org/wiki/%E0%A4%B8%E0%A5%87%E0%A4%B8%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="सेसियम – sanscrită" lang="sa" hreflang="sa" data-title="सेसियम" data-language-autonym="संस्कृतम्" data-language-local-name="sanscrită" class="interlanguage-link-target"><span>संस्कृतम्</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%A1%D0%B5%D0%B7%D0%B8%D1%83%D0%BC" title="Сезиум – sakha" lang="sah" hreflang="sah" data-title="Сезиум" data-language-autonym="Саха тыла" data-language-local-name="sakha" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sc mw-list-item"><a href="https://sc.wikipedia.org/wiki/Tz%C3%A8siu" title="Tzèsiu – sardiniană" lang="sc" hreflang="sc" data-title="Tzèsiu" data-language-autonym="Sardu" data-language-local-name="sardiniană" class="interlanguage-link-target"><span>Sardu</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Cesiu_(elementu)" title="Cesiu (elementu) – siciliană" lang="scn" hreflang="scn" data-title="Cesiu (elementu)" data-language-autonym="Sicilianu" data-language-local-name="siciliană" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Caesium" title="Caesium – scots" lang="sco" hreflang="sco" data-title="Caesium" data-language-autonym="Scots" data-language-local-name="scots" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Cezij" title="Cezij – sârbo-croată" lang="sh" hreflang="sh" data-title="Cezij" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="sârbo-croată" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Caesium" title="Caesium – Simple English" lang="en-simple" hreflang="en-simple" data-title="Caesium" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/C%C3%A9zium" title="Cézium – slovacă" lang="sk" hreflang="sk" data-title="Cézium" data-language-autonym="Slovenčina" data-language-local-name="slovacă" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Cezij" title="Cezij – slovenă" lang="sl" hreflang="sl" data-title="Cezij" data-language-autonym="Slovenščina" data-language-local-name="slovenă" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-so mw-list-item"><a href="https://so.wikipedia.org/wiki/Kaasiyaam" title="Kaasiyaam – somaleză" lang="so" hreflang="so" data-title="Kaasiyaam" data-language-autonym="Soomaaliga" data-language-local-name="somaleză" class="interlanguage-link-target"><span>Soomaaliga</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Ceziumi" title="Ceziumi – albaneză" lang="sq" hreflang="sq" data-title="Ceziumi" data-language-autonym="Shqip" data-language-local-name="albaneză" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8%D1%98%D1%83%D0%BC" title="Цезијум – sârbă" lang="sr" hreflang="sr" data-title="Цезијум" data-language-autonym="Српски / srpski" data-language-local-name="sârbă" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-stq mw-list-item"><a href="https://stq.wikipedia.org/wiki/Cesium" title="Cesium – Saterland Frisian" lang="stq" hreflang="stq" data-title="Cesium" data-language-autonym="Seeltersk" data-language-local-name="Saterland Frisian" class="interlanguage-link-target"><span>Seeltersk</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Cesium" title="Cesium – suedeză" lang="sv" hreflang="sv" data-title="Cesium" data-language-autonym="Svenska" data-language-local-name="suedeză" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Caesi" title="Caesi – swahili" lang="sw" hreflang="sw" data-title="Caesi" data-language-autonym="Kiswahili" data-language-local-name="swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%9A%E0%AF%80%E0%AE%9A%E0%AE%BF%E0%AE%AF%E0%AE%AE%E0%AF%8D" title="சீசியம் – tamilă" lang="ta" hreflang="ta" data-title="சீசியம்" data-language-autonym="தமிழ்" data-language-local-name="tamilă" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%B8%E0%B1%80%E0%B0%B8%E0%B0%BF%E0%B0%AF%E0%B0%82" title="సీసియం – telugu" lang="te" hreflang="te" data-title="సీసియం" data-language-autonym="తెలుగు" data-language-local-name="telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%A1%D0%B5%D0%B7%D0%B8%D0%B9" title="Сезий – tadjică" lang="tg" hreflang="tg" data-title="Сезий" data-language-autonym="Тоҷикӣ" data-language-local-name="tadjică" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%8B%E0%B8%B5%E0%B9%80%E0%B8%8B%E0%B8%B5%E0%B8%A2%E0%B8%A1" title="ซีเซียม – thailandeză" lang="th" hreflang="th" data-title="ซีเซียม" data-language-autonym="ไทย" data-language-local-name="thailandeză" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Sisyo" title="Sisyo – tagalog" lang="tl" hreflang="tl" data-title="Sisyo" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Sezyum" title="Sezyum – turcă" lang="tr" hreflang="tr" data-title="Sezyum" data-language-autonym="Türkçe" data-language-local-name="turcă" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D0%B8%D0%B9" title="Цезий – tătară" lang="tt" hreflang="tt" data-title="Цезий" data-language-autonym="Татарча / tatarça" data-language-local-name="tătară" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-ug mw-list-item"><a href="https://ug.wikipedia.org/wiki/%D8%B3%DB%90%D8%B2%D9%89%D9%8A" title="سېزىي – uigură" lang="ug" hreflang="ug" data-title="سېزىي" data-language-autonym="ئۇيغۇرچە / Uyghurche" data-language-local-name="uigură" class="interlanguage-link-target"><span>ئۇيغۇرچە / Uyghurche</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A6%D0%B5%D0%B7%D1%96%D0%B9" title="Цезій – ucraineană" lang="uk" hreflang="uk" data-title="Цезій" data-language-autonym="Українська" data-language-local-name="ucraineană" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%B3%DB%8C%D8%B2%DB%8C%D8%A6%D9%85" title="سیزیئم – urdu" lang="ur" hreflang="ur" data-title="سیزیئم" data-language-autonym="اردو" data-language-local-name="urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Seziy" title="Seziy – uzbecă" lang="uz" hreflang="uz" data-title="Seziy" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbecă" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vep mw-list-item"><a href="https://vep.wikipedia.org/wiki/Cezii" title="Cezii – Veps" lang="vep" hreflang="vep" data-title="Cezii" data-language-autonym="Vepsän kel’" data-language-local-name="Veps" class="interlanguage-link-target"><span>Vepsän kel’</span></a></li><li class="interlanguage-link interwiki-vi badge-Q17437798 badge-goodarticle mw-list-item" title="articol bun"><a href="https://vi.wikipedia.org/wiki/Caesi" title="Caesi – vietnameză" lang="vi" hreflang="vi" data-title="Caesi" data-language-autonym="Tiếng Việt" data-language-local-name="vietnameză" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wa mw-list-item"><a href="https://wa.wikipedia.org/wiki/Ceziom" title="Ceziom – valonă" lang="wa" hreflang="wa" data-title="Ceziom" data-language-autonym="Walon" data-language-local-name="valonă" class="interlanguage-link-target"><span>Walon</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Cesyo" title="Cesyo – waray" lang="war" hreflang="war" data-title="Cesyo" data-language-autonym="Winaray" data-language-local-name="waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E9%93%AF" title="铯 – chineză wu" lang="wuu" hreflang="wuu" data-title="铯" data-language-autonym="吴语" data-language-local-name="chineză wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-xal mw-list-item"><a href="https://xal.wikipedia.org/wiki/%D0%A6%D0%B5%D1%81%D0%B8%D1%83%D0%BC" title="Цесиум – calmucă" lang="xal" hreflang="xal" data-title="Цесиум" data-language-autonym="Хальмг" data-language-local-name="calmucă" class="interlanguage-link-target"><span>Хальмг</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%A6%D7%A2%D7%96" title="צעז – idiș" lang="yi" hreflang="yi" data-title="צעז" data-language-autonym="ייִדיש" data-language-local-name="idiș" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-yo mw-list-item"><a href="https://yo.wikipedia.org/wiki/Kesium" title="Kesium – yoruba" lang="yo" hreflang="yo" data-title="Kesium" data-language-autonym="Yorùbá" data-language-local-name="yoruba" class="interlanguage-link-target"><span>Yorùbá</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E9%93%AF" title="铯 – chineză" lang="zh" hreflang="zh" data-title="铯" data-language-autonym="中文" data-language-local-name="chineză" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-classical mw-list-item"><a href="https://zh-classical.wikipedia.org/wiki/%E9%8A%AB" title="銫 – Literary Chinese" lang="lzh" hreflang="lzh" data-title="銫" data-language-autonym="文言" data-language-local-name="Literary Chinese" class="interlanguage-link-target"><span>文言</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Caesium" title="Caesium – chineză min nan" lang="nan" hreflang="nan" data-title="Caesium" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="chineză min nan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E9%8A%AB" title="銫 – cantoneză" lang="yue" hreflang="yue" data-title="銫" data-language-autonym="粵語" data-language-local-name="cantoneză" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zu mw-list-item"><a href="https://zu.wikipedia.org/wiki/UmCanga" title="UmCanga – zulu" lang="zu" hreflang="zu" data-title="UmCanga" data-language-autonym="IsiZulu" data-language-local-name="zulu" class="interlanguage-link-target"><span>IsiZulu</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1108#sitelinks-wikipedia" title="Modifică legăturile interlinguale" class="wbc-editpage">Modifică legăturile</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Spații de nume"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Cesiu" title="Vedeți conținutul paginii [a]" accesskey="a"><span>Articol</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Discu%C8%9Bie:Cesiu" rel="discussion" title="Discuții despre această pagină [t]" accesskey="t"><span>Discuție</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">română</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Vizualizări"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Cesiu"><span>Lectură</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Cesiu&amp;veaction=edit" title="Modificați această pagină cu EditorulVizual [v]" accesskey="v"><span>Modificare</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Cesiu&amp;action=edit" title="Modificați codul sursă al acestei pagini [e]" accesskey="e"><span>Modificare sursă</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Cesiu&amp;action=history" title="Versiunile anterioare ale paginii și autorii lor. [h]" accesskey="h"><span>Istoric</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Unelte" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Unelte</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Unelte</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">mută în bara laterală</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">ascunde</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Mai multe opțiuni" > <div class="vector-menu-heading"> Acțiuni </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Cesiu"><span>Lectură</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Cesiu&amp;veaction=edit" title="Modificați această pagină cu EditorulVizual [v]" accesskey="v"><span>Modificare</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Cesiu&amp;action=edit" title="Modificați codul sursă al acestei pagini [e]" accesskey="e"><span>Modificare sursă</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Cesiu&amp;action=history"><span>Istoric</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:Ce_se_leag%C4%83_aici/Cesiu" title="Lista tuturor paginilor wiki care conduc spre această pagină [j]" accesskey="j"><span>Ce trimite aici</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:Modific%C4%83ri_corelate/Cesiu" rel="nofollow" title="Schimbări recente în legătură cu această pagină [k]" accesskey="k"><span>Schimbări corelate</span></a></li><li id="t-upload" class="mw-list-item"><a href="//ro.wikipedia.org/wiki/Wikipedia:Trimite_fișier" title="Încărcare fișiere [u]" accesskey="u"><span>Trimite fișier</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Cesiu&amp;oldid=16871712" title="Legătură permanentă către această versiune a acestei pagini"><span>Legătură permanentă</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Cesiu&amp;action=info" title="Mai multe informații despre această pagină"><span>Informații despre pagină</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:Citeaz%C4%83&amp;page=Cesiu&amp;id=16871712&amp;wpFormIdentifier=titleform" title="Informații cu privire la modul de citare a acestei pagini"><span>Citează acest articol</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&amp;url=https%3A%2F%2Fro.wikipedia.org%2Fwiki%2FCesiu"><span>Obține URL scurtat</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&amp;url=https%3A%2F%2Fro.wikipedia.org%2Fwiki%2FCesiu"><span>Descărcați codul QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Tipărire/exportare </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Special:Carte&amp;bookcmd=book_creator&amp;referer=Cesiu"><span>Creare carte</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&amp;page=Cesiu&amp;action=show-download-screen"><span>Descărcare ca PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Cesiu&amp;printable=yes" title="Versiunea de tipărit a acestei pagini [p]" accesskey="p"><span>Versiune de tipărit</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> În alte proiecte </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Caesium" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1108" title="Legătură către elementul asociat din depozitul de date [g]" accesskey="g"><span>Element Wikidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Aspect"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Aspect</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">mută în bara laterală</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">ascunde</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">De la Wikipedia, enciclopedia liberă</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="ro" dir="ltr"><table class="infocaseta" cellspacing="2"> <tbody><tr> <td colspan="2" class="antet stiinteexacte" style="background-color:#ff6666">Cesiu </td></tr> <tr> <td colspan="2" style="text-align:center;"><span typeof="mw:File"><a href="/wiki/Fi%C8%99ier:Cesium.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Cesium.jpg/200px-Cesium.jpg" decoding="async" width="200" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Cesium.jpg/300px-Cesium.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Cesium.jpg/400px-Cesium.jpg 2x" data-file-width="4000" data-file-height="3000" /></a></span><br /> </td></tr> <tr> <td colspan="2"> <table align="center" cellpadding="0" cellspacing="0" width="100%" style="background:#f9f9f9"> <tbody><tr> <td colspan="2" align="center" style="padding-bottom:0.5em;"><a href="/wiki/Xenon" title="Xenon">Xenon</a> ← <b>Cesiu</b> → <a href="/wiki/Bariu" title="Bariu">Bariu</a> </td></tr> <tr> <td style="valign:middle; text-align:center;"><a href="/wiki/Rubidiu" title="Rubidiu">Rb</a> </td> <td align="center" rowspan="3"> <table border="0" cellpadding="0" cellspacing="1" align="center" style="border-collapse:separate;width:248px;background-color:transparent;"> <tbody><tr> <td style="padding:0;width:7px;height:9px;border:none;background-color:#a0ffa0;"><a href="/wiki/Hidrogen" title="Hidrogen"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="border:none;width:7px;padding:0;background-color:transparent;"> </td> <td rowspan="3" style="border:none;width:7px;padding:0;background-color:transparent;"> </td> <td colspan="14" rowspan="5" style="border:none;padding:0;background-color:transparent;"><span typeof="mw:File"><a href="/wiki/Fi%C8%99ier:Cubic-face-centered.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Cubic-face-centered.svg/60px-Cubic-face-centered.svg.png" decoding="async" width="43" height="50" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Cubic-face-centered.svg/65px-Cubic-face-centered.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Cubic-face-centered.svg/86px-Cubic-face-centered.svg.png 2x" data-file-width="109" data-file-height="126" /></a></span> </td> <td colspan="9" rowspan="3" style="border:none;text-align:center;padding:0;background-color:transparent;"> <table align="center" border="0" cellpadding="0" cellspacing="0" style="background-color:transparent;"> <tbody><tr> <td style="font-size:10pt;border:none;padding:0;line-height:1em;background-color:transparent;"><br />55</td> <td style="font-size:16pt;border:none;padding:0;line-height:1em;background-color:transparent;"><b>Cs</b></td></tr></tbody></table> </td> <td colspan="5" style="border:none;padding:0;background-color:transparent;"> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#c0ffff;"><a href="/wiki/Heliu" title="Heliu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td></tr> <tr> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff6666;"><a href="/wiki/Litiu" title="Litiu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffdead;"><a href="/wiki/Beriliu" title="Beriliu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccc99;"><a href="/wiki/Bor_(element)" title="Bor (element)"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#a0ffa0;"><a href="/wiki/Carbon" title="Carbon"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#a0ffa0;"><a href="/wiki/Azot" title="Azot"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#a0ffa0;"><a href="/wiki/Oxigen" title="Oxigen"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffff99;"><a href="/wiki/Fluor" title="Fluor"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#c0ffff;"><a href="/wiki/Neon" title="Neon"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td></tr> <tr> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff6666;"><a href="/wiki/Sodiu" title="Sodiu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffdead;"><a href="/wiki/Magneziu" title="Magneziu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; 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style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Mendeleeviu" class="mw-redirect" title="Mendeleeviu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Nobeliu" title="Nobeliu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Lawren%C8%9Biu" class="mw-redirect" title="Lawrențiu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Rutherfordiu" title="Rutherfordiu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Dubniu" title="Dubniu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Seaborgiu" title="Seaborgiu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Bohriu" title="Bohriu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Hassiu" title="Hassiu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Meitneriu" title="Meitneriu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Darmstadtiu" title="Darmstadtiu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Roentgeniu" title="Roentgeniu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Coperniciu" title="Coperniciu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccccc;"><a href="/wiki/Ununtriu" class="mw-redirect" title="Ununtriu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccccc;"><a href="/wiki/Fleroviu" title="Fleroviu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#E8E8E8;"><a href="/wiki/Ununpentiu" class="mw-redirect" title="Ununpentiu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccccc;"><a href="/wiki/Livermoriu" title="Livermoriu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#fcfecc;"><a href="/wiki/Ununseptiu" class="mw-redirect" title="Ununseptiu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#c0ffff;"><a href="/wiki/Ununoctiu" class="mw-redirect" title="Ununoctiu"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;">&#160;</span></a> </td></tr></tbody></table> </td></tr> <tr> <td style="valign:middle; text-align:center;"><b>Cs</b> </td></tr> <tr> <td style="valign:middle; text-align:center;"><a href="/wiki/Franciu" title="Franciu">Fr</a> </td></tr> <tr> <td colspan="2" align="center" style="padding-top:0.5em;"><a href="/wiki/Tabelul_periodic_al_elementelor" title="Tabelul periodic al elementelor">Tabelul complet</a> • <a href="/wiki/Tabelul_periodic_al_elementelor_(extins)" title="Tabelul periodic al elementelor (extins)">Tabelul extins</a> </td></tr></tbody></table> </td></tr> <tr> <th colspan="2" style="background-color:#ff6666; text-align: center; padding: 3px; line-height: 15px;">Informații generale </th></tr> <tr> <td width="60%"><a href="/wiki/Lista_elementelor_chimice_dup%C4%83_nume" title="Lista elementelor chimice după nume">Nume</a>, <a href="/wiki/Tabelul_periodic_al_elementelor" title="Tabelul periodic al elementelor">Simbol</a>, <a href="/wiki/Num%C4%83r_atomic" title="Număr atomic">Număr</a> </td> <td width="40%">Cesiu, Cs, 55 </td></tr> <tr> <td><a href="/wiki/Serie_chimic%C4%83" title="Serie chimică">Serie chimică</a> </td> <td><a href="/wiki/Metale_alcaline" class="mw-redirect" title="Metale alcaline">Metale alcaline</a> </td></tr> <tr> <td><a href="/wiki/Grupele_tabelului_periodic" class="mw-redirect" title="Grupele tabelului periodic">Grupă</a>, <a href="/wiki/Perioadele_tabelului_periodic" class="mw-redirect" title="Perioadele tabelului periodic">Perioadă</a>, <a href="/wiki/Blocurile_tabelului_periodic" class="mw-redirect" title="Blocurile tabelului periodic">Bloc</a> </td> <td>IA, 6, s </td></tr> <tr> <td><a href="/wiki/Densitate" title="Densitate">Densitate</a> </td> <td>1900 <a href="/wiki/Kilogram_pe_metru_cub" title="Kilogram pe metru cub">kg/m³</a> </td></tr> <tr> <td><a href="/wiki/Culoare" title="Culoare">Culoare</a> </td> <td>argintiu-aurie </td></tr> <tr> <td><a href="/wiki/Num%C4%83r_CAS" class="mw-redirect" title="Număr CAS">Număr CAS</a> </td> <td>7440-46-2 </td></tr> <tr style="display:none;"> <td><a href="/w/index.php?title=Num%C4%83r_EINECS&amp;action=edit&amp;redlink=1" class="new" title="Număr EINECS — pagină inexistentă">Număr EINECS</a> </td> <td> </td></tr> <tr> <th colspan="2" style="background-color:#ff6666; text-align: center; padding: 3px; line-height: 15px;">Proprietăți atomice </th></tr> <tr> <td><a href="/wiki/Mas%C4%83_atomic%C4%83" title="Masă atomică">Masă atomică</a> </td> <td>132,94 <a href="/wiki/Unitate_atomic%C4%83_de_mas%C4%83" title="Unitate atomică de masă">u</a> </td></tr> <tr> <td><a href="/wiki/Raz%C4%83_atomic%C4%83" title="Rază atomică">Rază atomică</a> </td> <td>267 <a href="/wiki/Picometru" title="Picometru">pm</a> </td></tr> <tr> <td><a href="/wiki/Raz%C4%83_de_covalen%C8%9B%C4%83" class="mw-redirect" title="Rază de covalență">Rază de covalență</a> </td> <td>225 <a href="/wiki/Picometru" title="Picometru">pm</a> </td></tr> <tr> <td><a href="/wiki/Raz%C4%83_van_der_Waals" title="Rază van der Waals">Rază van der Waals</a> </td> <td>343 <a href="/wiki/Picometru" title="Picometru">pm</a> </td></tr> <tr> <td><a href="/wiki/Configura%C8%9Bie_electronic%C4%83" title="Configurație electronică">Configurație electronică</a> </td> <td>[Xe][6s<sup>1</sup>] </td></tr> <tr> <td><a href="/wiki/Electron" title="Electron">Electroni</a> pe <a href="/wiki/Nivel_de_energie" title="Nivel de energie">nivelul de energie</a> </td> <td>2, 8, 18, 18, 8, 1 </td></tr> <tr> <td><a href="/wiki/Num%C4%83r_de_oxidare" title="Număr de oxidare">Număr de oxidare</a> </td> <td><b>1</b> </td></tr> <tr> <td><a href="/wiki/Oxid" title="Oxid">Oxid</a> </td> <td><a href="/wiki/Baz%C4%83_(chimie)" title="Bază (chimie)">bazic</a> </td></tr> <tr> <td><a href="/wiki/Structur%C4%83_cristalin%C4%83" title="Structură cristalină">Structură cristalină</a> </td> <td>cubică cu fețe centrate </td></tr> <tr> <th colspan="2" style="background-color:#ff6666; text-align: center; padding: 3px; line-height: 15px;">Proprietăți fizice </th></tr> <tr> <td><a href="/wiki/Stare_de_agregare" title="Stare de agregare">Fază ordinară</a> </td> <td>solid </td></tr> <tr> <td><a href="/wiki/Punct_de_topire" title="Punct de topire">Punct de topire</a> </td> <td>28,45°C&#160;; 301,6&#160;<a href="/wiki/Kelvin" title="Kelvin">K</a> </td></tr> <tr> <td><a href="/wiki/Punct_de_fierbere" title="Punct de fierbere">Punct de fierbere</a> </td> <td>670,8°C&#160;; 943,95&#160;<a href="/wiki/Kelvin" title="Kelvin">K</a> </td></tr> <tr style="display:none;"> <td><a href="/w/index.php?title=Energie_de_fuziune&amp;action=edit&amp;redlink=1" class="new" title="Energie de fuziune — pagină inexistentă">Energie de fuziune</a> </td> <td><a href="/wiki/Joule_pe_mol" title="Joule pe mol">kJ/mol</a> </td></tr> <tr> <td><a href="/w/index.php?title=Energie_de_evaporare&amp;action=edit&amp;redlink=1" class="new" title="Energie de evaporare — pagină inexistentă">Energie de evaporare</a> </td> <td>63,9 kJ/mol <a href="/wiki/Joule_pe_mol" title="Joule pe mol">kJ/mol</a> </td></tr> <tr style="display:none;"> <td><a href="/w/index.php?title=Temperatur%C4%83_critic%C4%83&amp;action=edit&amp;redlink=1" class="new" title="Temperatură critică — pagină inexistentă">Temperatură critică</a> </td> <td>&#160;<a href="/wiki/Kelvin" title="Kelvin">K</a> </td></tr> <tr style="display:none;"> <td><a href="/w/index.php?title=Presiune_critic%C4%83&amp;action=edit&amp;redlink=1" class="new" title="Presiune critică — pagină inexistentă">Presiune critică</a> </td> <td>&#160;<a href="/wiki/Pascal_(unitate)" class="mw-redirect" title="Pascal (unitate)">Pa</a> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Volum_molar" title="Volum molar">Volum molar</a> </td> <td><a href="/w/index.php?title=Metru_cub_pe_kmol&amp;action=edit&amp;redlink=1" class="new" title="Metru cub pe kmol — pagină inexistentă">m³/kmol</a> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Presiune_de_vapori" title="Presiune de vapori">Presiune de vapori</a> </td> <td> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Viteza_sunetului" title="Viteza sunetului">Viteza sunetului</a> </td> <td><a href="/w/index.php?title=Metru_pe_secund%C4%83&amp;action=edit&amp;redlink=1" class="new" title="Metru pe secundă — pagină inexistentă">m/s</a> la 20 <a href="/wiki/Grad_Celsius" class="mw-redirect" title="Grad Celsius">°C</a> </td></tr> <tr style="display:none;"> <td>Forță <a href="/wiki/Magnet" title="Magnet">magnetică</a> </td> <td> </td></tr> <tr> <th colspan="2" style="background-color:#ff6666; text-align: center; padding: 3px; line-height: 15px;">Informații diverse </th></tr> <tr> <td><a href="/wiki/Electronegativitate" title="Electronegativitate">Electronegativitate</a> <small>(<a href="/w/index.php?title=Scara_lui_Pauling&amp;action=edit&amp;redlink=1" class="new" title="Scara lui Pauling — pagină inexistentă">Pauling</a>)</small> </td> <td>0,7 </td></tr> <tr style="display:none;"> <td><a href="/wiki/Capacitate_termic%C4%83_masic%C4%83" title="Capacitate termică masică">Capacitate termică masică</a> </td> <td><a href="/w/index.php?title=Joule_pe_kilogram-kelvin&amp;action=edit&amp;redlink=1" class="new" title="Joule pe kilogram-kelvin — pagină inexistentă">J/(kg·K)</a> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Conductivitate_electric%C4%83" title="Conductivitate electrică">Conductivitate electrică</a> </td> <td><a href="/wiki/Siemens_(unitate)" class="mw-redirect" title="Siemens (unitate)">S</a>/m </td></tr> <tr> <td><a href="/wiki/Conductivitate_termic%C4%83" title="Conductivitate termică">Conductivitate termică</a> </td> <td>35,9 W/m·K<sup>-1</sup> <a href="/w/index.php?title=Watt_pe_metru-kelvin&amp;action=edit&amp;redlink=1" class="new" title="Watt pe metru-kelvin — pagină inexistentă">W/(m·K)</a> </td></tr> <tr class="hiddenStructure375,7 kJ/mol"> <td>Prima <a href="/wiki/Energie_de_ionizare" title="Energie de ionizare">energie de ionizare</a> </td> <td>375,7 kJ/mol <a href="/wiki/Joule_pe_mol" title="Joule pe mol">kJ/mol</a> </td></tr> <tr class="hiddenStructure2234,3 kJ/mol"> <td>A 2-a <a href="/wiki/Energie_de_ionizare" title="Energie de ionizare">energie de ionizare</a> </td> <td>2234,3 kJ/mol <a href="/wiki/Joule_pe_mol" title="Joule pe mol">kJ/mol</a> </td></tr> <tr class="hiddenStructure3400 kJ/mol"> <td>A 3-a <a href="/wiki/Energie_de_ionizare" title="Energie de ionizare">energie de ionizare</a> </td> <td>3400 kJ/mol <a href="/wiki/Joule_pe_mol" title="Joule pe mol">kJ/mol</a> </td></tr> <tr class="hiddenStructure"> <td>A 4-a <a href="/wiki/Energie_de_ionizare" title="Energie de ionizare">energie de ionizare</a> </td> <td>{{{potențial_de_ionizare_4}}} <a href="/wiki/Joule_pe_mol" title="Joule pe mol">kJ/mol</a> </td></tr> <tr class="hiddenStructure"> <td>A 5-a <a href="/wiki/Energie_de_ionizare" title="Energie de ionizare">energie de ionizare</a> </td> <td>{{{potențial_de_ionizare_5}}} <a href="/wiki/Joule_pe_mol" title="Joule pe mol">kJ/mol</a> </td></tr> <tr class="hiddenStructure"> <td>A 6-a <a href="/wiki/Energie_de_ionizare" title="Energie de ionizare">energie de ionizare</a> </td> <td>{{{potențial_de_ionizare_6}}} <a href="/wiki/Joule_pe_mol" title="Joule pe mol">kJ/mol</a> </td></tr> <tr class="hiddenStructure"> <td>A 7-a <a href="/wiki/Energie_de_ionizare" title="Energie de ionizare">energie de ionizare</a> </td> <td>{{{potențial_de_ionizare_7}}} <a href="/wiki/Joule_pe_mol" title="Joule pe mol">kJ/mol</a> </td></tr> <tr class="hiddenStructure"> <td>A 8-a <a href="/wiki/Energie_de_ionizare" title="Energie de ionizare">energie de ionizare</a> </td> <td>{{{potențial_de_ionizare_8}}} <a href="/wiki/Joule_pe_mol" title="Joule pe mol">kJ/mol</a> </td></tr> <tr class="hiddenStructure"> <td>A 9-a <a href="/wiki/Energie_de_ionizare" title="Energie de ionizare">energie de ionizare</a> </td> <td>{{{potențial_de_ionizare_9}}} <a href="/wiki/Joule_pe_mol" title="Joule pe mol">kJ/mol</a> </td></tr> <tr class="hiddenStructure"> <td>A 10-a <a href="/wiki/Energie_de_ionizare" title="Energie de ionizare">energie de ionizare</a> </td> <td>{{{potențial_de_ionizare_10}}} <a href="/wiki/Joule_pe_mol" title="Joule pe mol">kJ/mol</a> </td></tr> <tr> <th colspan="2" style="background-color:#ff6666; text-align: center; padding: 3px; line-height: 15px; margin-top:none; margin-left:none; margin-right:none;">Cei mai stabili izotopi </th></tr> <tr><td colspan="2" style="padding:0px"> <table width="100%" rules="all" class="wikitable" style="text-align:center; margin-top:0; margin-bottom:0;"> <tbody><tr style="background:#f2f2f2;"> <td valign="middle" rowspan="2"> <a href="/wiki/Izotop" title="Izotop">Simbol</a></td> <td valign="middle" rowspan="2"> <a href="/wiki/Abunden%C8%9B%C4%83_natural%C4%83" title="Abundență naturală">AN</a></td> <td valign="middle" rowspan="2"> <a href="/wiki/Perioad%C4%83_de_%C3%AEnjum%C4%83t%C4%83%C8%9Bire" title="Perioadă de înjumătățire">T<small>1/2</small></a></td> <td valign="middle" rowspan="2"> <a href="/wiki/Mod_de_dezintegrare" class="mw-redirect" title="Mod de dezintegrare">MD</a></td> <td><a href="/wiki/Energie_de_dezintegrare" title="Energie de dezintegrare">Ed</a></td> <td valign="middle" rowspan="2"> <a href="/w/index.php?title=Produsul_dezintegr%C4%83rii&amp;action=edit&amp;redlink=1" class="new" title="Produsul dezintegrării — pagină inexistentă">PD</a></td></tr> <tr style="background:#f2f2f2;"> <td><a href="/wiki/Electronvolt" title="Electronvolt">MeV</a></td></tr> <tr><td><sup>133</sup>Cs</td><td>100%</td><td colspan="4">stabil cu stabil cu 78 neutroni <a href="/wiki/Neutron" title="Neutron">neutroni</a></td> </tr> <tr><td><sup>134</sup>Cs</td><td>sintetic</td><td>2,0648 ani</td><td></td><td></td><td></td> </tr> <tr><td><sup>135</sup>Cs</td><td>urme</td><td>2,3×10<sup>6</sup> ani</td><td></td><td></td><td></td> </tr> <tr><td><sup>137</sup>Cs</td><td>sintetic</td><td>30,17 ani</td><td></td><td></td><td></td> </tr> </tbody></table></td><td> </td></tr><tr style="display:none;"> <th colspan="2" style="background-color:#ff6666; text-align: center; padding: 3px; line-height: 15px;">Precauții </th></tr> <tr style="display:none;"> <td><a href="/wiki/NFPA_704" title="NFPA 704">NFPA 704</a> </td> <td> </td></tr> <tr> <td colspan="2" style="text-align:center; border-top: 2px #ff6666 solid; font-size: 80%;"><i>Unitățile <a href="/wiki/Sistemul_interna%C8%9Bional_de_unit%C4%83%C8%9Bi" title="Sistemul internațional de unități">SI</a> și condiții de temperatură și presiune normale dacă nu s-a specificat altfel.</i> </td></tr> <tr><td class="navigation-only" colspan="2" style="border-top: 2px #FFFFFF solid; font-size: 80%; background:inherit; color:var(--color-base, #000); text-align: right;"><span class="plainlinks" style="float:left;">Modifică <a class="external text" href="https://ro.wikipedia.org/w/index.php?title=Cesiu&amp;action=edit&amp;section=0">text</a></span>&#160;<span title="Consultați documentația formatului"><span typeof="mw:File"><a href="//ro.wikipedia.org/wiki/Format:Infocaseta_Element_chimic" title="Consultați documentația formatului"><img alt="Consultați documentația formatului" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Gtk-dialog-info.svg/20px-Gtk-dialog-info.svg.png" decoding="async" width="12" height="12" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b4/Gtk-dialog-info.svg/40px-Gtk-dialog-info.svg.png 2x" data-file-width="60" data-file-height="60" /></a></span></span></td> </tr></tbody></table><style data-mw-deduplicate="TemplateStyles:r16861271">.mw-parser-output .infocaseta{background:var(--background-color-neutral-subtle,#f8f9fa);color:var(--color-base,#000)}.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}body.skin-minerva .mw-parser-output .infobox-header,body.skin-minerva .mw-parser-output .infobox-subheader,body.skin-minerva .mw-parser-output .infobox-above,body.skin-minerva .mw-parser-output .infobox-title,body.skin-minerva .mw-parser-output .infobox-image,body.skin-minerva .mw-parser-output .infobox-full-data,body.skin-minerva .mw-parser-output .infobox-below{text-align:center}</style> <p><b>Cesiul</b> este un <a href="/wiki/Element_chimic" title="Element chimic">element chimic</a> din <a href="/wiki/Metal_alcalin" title="Metal alcalin">grupa metalelor alcaline</a> cu simbolul <b>Cs</b> și cu <a href="/wiki/Num%C4%83r_atomic" title="Număr atomic">numărul atomic</a> 55. Din punct de vedere fizic, <a href="/wiki/Metal" title="Metal">metalul</a> este moale, de <a href="/wiki/Culoare" title="Culoare">culoare</a> argintiu-aurie, cu un <a href="/wiki/Punct_de_topire" title="Punct de topire">punct de topire</a> de 28&#160;°C (82&#160;°F), aceasta făcându-l unul dintre singurele cinci metale care se pot afla în stare <a href="/wiki/Lichid" title="Lichid">lichidă</a> sau într-o stare de trecere dintre starea lichidă și cea solidă la temperatura camerei. <sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">&#91;</span>note 1<span class="cite-bracket">&#93;</span></a></sup> Cesiul este un <a href="/wiki/Metal_alcalin" title="Metal alcalin">metal alcalin</a> și are proprietăți fizico-chimice asemănătoare cu cele ale <a href="/wiki/Rubidiu" title="Rubidiu">rubidiului</a> și ale <a href="/wiki/Potasiu" title="Potasiu">potasiului</a>. Metalul este foarte reactiv și <a href="/wiki/Piroforicitate" title="Piroforicitate">piroforic</a>, reacționând cu <a href="/wiki/Ap%C4%83" title="Apă">apa</a> la o temperatură de cel puțin −116&#160;°C (−177&#160;°F). Este elementul cu cea mai mică <a href="/wiki/Electronegativitate" title="Electronegativitate">electronegativitate</a> având un <a href="/wiki/Izotop" title="Izotop">izotop</a> stabil (Cesiu-133). Metalul este extras din <a href="/wiki/Polucit" title="Polucit">polucit</a>, în timp ce radioizotopii (în special cesiu-137) sunt separați din <a href="/wiki/Combustibil_nuclear_epuizat" title="Combustibil nuclear epuizat">combustibilul nucleat epuizat</a>. </p><p>Cesiul a fost descoperit de către doi <a href="/wiki/Chimist" title="Chimist">chimiști</a> <a href="/wiki/Germani" title="Germani">germani</a>, <a href="/wiki/Robert_Bunsen" title="Robert Bunsen">Robert Bunsen</a> și <a href="/wiki/Gustav_Robert_Kirchhoff" title="Gustav Robert Kirchhoff">Gustav Kirchhoff</a> în anul <a href="/wiki/1860" title="1860">1860</a> cu ajutorul liniei sale spectroscopice. Prima utilizare pe scară redusă a elementului a fost cea de "reducător" (sau <i>getter</i>) în tuburi cu <a href="/wiki/Vid" title="Vid">vid</a> și în celule fotoelectrice. În <a href="/wiki/1967" title="1967">1967</a>, perioada specifică de tranziție între cele două niveluri hiperfine ale stării fundamentale ale izotopului cesiu-133 a fost ales de către <a href="/wiki/Sistemul_interna%C8%9Bional_de_unit%C4%83%C8%9Bi" title="Sistemul internațional de unități">Sistemul internațional de unități</a> la baza definirii etalonului pentru <a href="/wiki/Secund%C4%83" title="Secundă">secunda</a>. Încă de atunci, cesiul a fost utilizat, pe scară largă, ca <i>oscilator cuantic</i> pentru <a href="/wiki/Ceas_atomic" title="Ceas atomic">ceasuri atomice</a>. </p><p>Din anii <a href="/wiki/1990" title="1990">1990</a>, cea mai însemnată utilizare a elementului este aceea de substanță de umplutură pentru lichidele de forat folosite pentru a atenua găurirea din timpul forării. Cesiul mai are o gamă largă de aplicații în producerea <a href="/wiki/Electricitate" title="Electricitate">electricității</a>, în aparate electronice și în <a href="/wiki/Chimie" title="Chimie">chimie</a>. Radioizotopul cesiu-137 are un timp de înjumătățire de aproximativ 30 de <a href="/wiki/An" title="An">ani</a> și este folosit în <a href="/wiki/Medicin%C4%83" title="Medicină">medicină</a>, măsurători și <a href="/wiki/Hidrologie" title="Hidrologie">hidrologie</a>. Deși elementul nu este foarte toxic, este periculos și exploziv, iar izotopii săi prezintă un risc ridicat în caz de scurgere radioactivă. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Istoric">Istoric</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=1" title="Modifică secțiunea: Istoric" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=1" title="Edit section&#39;s source code: Istoric"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/Fi%C8%99ier:Kirchhoff_Bunsen_Roscoe.jpg" class="mw-file-description"><img alt="Three middle-aged men, with the one in the middle sitting down. All wear long jackets, and the shorter man on the left has a beard." src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Kirchhoff_Bunsen_Roscoe.jpg/220px-Kirchhoff_Bunsen_Roscoe.jpg" decoding="async" width="220" height="297" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Kirchhoff_Bunsen_Roscoe.jpg/330px-Kirchhoff_Bunsen_Roscoe.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/3/3e/Kirchhoff_Bunsen_Roscoe.jpg 2x" data-file-width="392" data-file-height="530" /></a><figcaption><a href="/wiki/Gustav_Kirchhoff" class="mw-redirect" title="Gustav Kirchhoff">Gustav Kirchhoff</a> (stânga) și <a href="/wiki/Robert_Bunsen" title="Robert Bunsen">Robert Bunsen</a> (centru) au descoperit spectroscopicitatea cesiului</figcaption></figure> <p>În <a href="/wiki/1860" title="1860">1860</a>, <a href="/wiki/Robert_Bunsen" title="Robert Bunsen">Robert Bunsen</a> și <a href="/wiki/Gustav_Kirchhoff" class="mw-redirect" title="Gustav Kirchhoff">Gustav Kirchhoff</a> au descoperit cesiul în <a href="/wiki/Ap%C4%83_mineral%C4%83" title="Apă minerală">apa minerală</a> provenită din Dürkheim, <a href="/wiki/Germania" title="Germania">Germania</a>. Datorită liniilor spectroscopice de culoare albastră intensă, cesiul și-a primit numele după cuvântul latin <i>caesius</i>, ce înseamnă albastru-celestin. <sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">&#91;</span>note 2<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-BuKi1861_5-0" class="reference"><a href="#cite_note-BuKi1861-5"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Weeks_6-0" class="reference"><a href="#cite_note-Weeks-6"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup> Cesiul a fost primul element descoperit cu ajutorul spectrului, la un <a href="/wiki/An" title="An">an</a> după inventarea <a href="/wiki/Spectroscop" title="Spectroscop">spectroscopului</a>.<sup id="cite_ref-autogenerated1_7-0" class="reference"><a href="#cite_note-autogenerated1-7"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup> </p><p>Pentru a obține o mostră pură de cesiu, 44.000 de <a href="/wiki/Litru" title="Litru">litri</a> de apă minerală au fost evaporați, rămânând 240 <a href="/wiki/Kilogram" title="Kilogram">kg</a> de soluție concentrată de <a href="/wiki/Sare_(chimie)" title="Sare (chimie)">săruri</a>. În cele din urmă, cesiul a fost precipitat sub formă de sulfat sau oxalat. După conversia cesiului în azotat și după extracția cu <a href="/wiki/Etanol" title="Etanol">etanol</a>, s-a obținut un amestec cu <a href="/wiki/Sodiu" title="Sodiu">sodiu</a>. Din acest amestec, <a href="/wiki/Litiu" title="Litiu">litiul</a> a fost precipitat cu <a href="/wiki/Carbonat_de_amoniu" title="Carbonat de amoniu">carbonat de amoniu</a>, iar potasiul, rubidiul și cesiul au format săruri insolubile cu acidul cloroplatinic, însă aceste săruri prezentau diferențe în solubilitate în apa fierbinte. Prin urmare, hexacloroplatinatul de cesiu și rubidiu ((Cs,Rb)<sub>2</sub>PtCl<sub>6</sub>) putea fi separat din amestec prin cristalizare fracționată. După reducerea compusului cu <a href="/wiki/Hidrogen" title="Hidrogen">hidrogen</a>, cesiul și rubidiul au putut fi separați datorită diferenței de solubilitate a carbonaților săi în <a href="/wiki/Alcool" title="Alcool">alcool</a>. Din toți cei 44.000 de litri de apă minerală, s-a obținut 9,2 grame de <a href="/w/index.php?title=Clorur%C4%83_de_rubidiu&amp;action=edit&amp;redlink=1" class="new" title="Clorură de rubidiu — pagină inexistentă">clorură de rubidiu</a> și 7,3 grame de clorură de cesiu.<sup id="cite_ref-BuKi1861_5-1" class="reference"><a href="#cite_note-BuKi1861-5"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> Cei doi savanți au folosit clorura de cesiu astfel obținută pentru a estima <a href="/wiki/Mas%C4%83_atomic%C4%83" title="Masă atomică">masa atomică</a> a noului element la 123,35 uam (deși astăzi a fost recalculată la 132,9 uam).<sup id="cite_ref-BuKi1861_5-2" class="reference"><a href="#cite_note-BuKi1861-5"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> Aceștia au încercat să obțină cesiu elementar prin <a href="/wiki/Electroliz%C4%83" title="Electroliză">electroliza</a> clorurii de cesiu în topitură, dar, în loc să obțină ceea ce au dorit, ei au generat o substanță albastră omogenă „ce nu putea fi văzută nici cu ochiul liber, dar nici cu microscopul”; savanții au crezut că au obținut un compus ne-stoichiometric cu formula (<span class="chemf nowrap">Cs<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>Cl</span>). De fapt, ei au produs, cel mai probabil, un amestec coloidal de metal și clorură de cesiu.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup> Electroliza soluției apoase de clorură cu <a href="/wiki/Anod" title="Anod">anod</a> <a href="/wiki/Lichid" title="Lichid">lichid</a> de <a href="/wiki/Mercur_(element)" title="Mercur (element)">mercur</a> produce un amalgam ce se descompune rapid sub influența <a href="/wiki/Ap%C4%83" title="Apă">apei</a>.<sup id="cite_ref-BuKi1861_5-3" class="reference"><a href="#cite_note-BuKi1861-5"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> Metalul pur a fost izolat, în cele din urmă, de către <a href="/wiki/Chimist" title="Chimist">chimistul</a> <a href="/wiki/Germani" title="Germani">german</a> <a href="/w/index.php?title=Carl_Setterberg&amp;action=edit&amp;redlink=1" class="new" title="Carl Setterberg — pagină inexistentă">Carl Setterberg</a> în timp ce își pregătea lucrarea de doctorat cu <a href="/wiki/Friedrich_August_Kekul%C3%A9_von_Stradonitz" title="Friedrich August Kekulé von Stradonitz">Kekulé</a> și Bunsen.<sup id="cite_ref-Weeks_6-1" class="reference"><a href="#cite_note-Weeks-6"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup> În <a href="/wiki/1882" title="1882">1882</a>, acesta a produs cesiu metalic prin electroliza cianurii de cesiu, iar astfel a fost rezolvată problema clorurii de cesiu.<sup id="cite_ref-Sett_9-0" class="reference"><a href="#cite_note-Sett-9"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup> </p><p>Din punct de vedere istoric, cele mai importante utilizări ale cesiului au fost în cercetarea științifică și în dezvoltare, mai ales în domeniul <a href="/wiki/Chimie" title="Chimie">chimic</a>. Câteva aplicații ale cesiului existau încă din anii <a href="/wiki/1920" title="1920">1920</a>, când a început să fie folosit în tuburi cu <a href="/wiki/Vid" title="Vid">vid</a>, unde a avut două funcții: ca epurator (înlătura excesul de <a href="/wiki/Oxigen" title="Oxigen">oxigen</a> de după fabricare) și ca strat deasupra catodului de încălzire, pentru a crește conductivitatea electrică a acestuia. Cesiul nu a fost recunoscut ca un metal cu utilizări industriale înainte de anii <a href="/wiki/1950" title="1950">1950</a>.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> Printre aplicațiie cesiului non-radioactiv menționăm aplicațiile în celule fotovoltaice, în tuburi fotomultiplicatoare, în componentele optice ale spectrofotometrelor cu raze infra-roșii, în cataliza unor reacții organice și în <a href="/wiki/Generator_magnetohidrodinamic" title="Generator magnetohidrodinamic">generatorul magnetohidrodinamic</a>.<sup id="cite_ref-USGS_11-0" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> </p><p>Încă din <a href="/wiki/1967" title="1967">1967</a>, <a href="/wiki/Sistemul_interna%C8%9Bional_de_unit%C4%83%C8%9Bi" title="Sistemul internațional de unități">Sistemul internațional de unități</a> a utilizat cesiul pentru a crea etalonul <a href="/wiki/Secund%C4%83" title="Secundă">secundă</a>, definind secunda ca o perioadă de 9.192.631.770 cicluri ale radiației, ce corespund dezintegrării radioactive a <a href="/wiki/Atom" title="Atom">atomului</a> de cesiu-133.<sup id="cite_ref-USNO_12-0" class="reference"><a href="#cite_note-USNO-12"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup> În urma celei de a 13-a ediție a General Conference on Weights and Measures din <a href="/wiki/1967" title="1967">1967</a>, secunda a fost denumită (definită) ca „durata a 9.192.631.770 cicluri a luminii cu microunde absorbită sau emisă de către tranzițiile hiperfine ale atomilor de cesiu-133”. </p> <div class="mw-heading mw-heading2"><h2 id="Proprietăți"><span id="Propriet.C4.83.C8.9Bi"></span>Proprietăți</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=2" title="Modifică secțiunea: Proprietăți" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=2" title="Edit section&#39;s source code: Proprietăți"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Fizice">Fizice</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=3" title="Modifică secțiunea: Fizice" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=3" title="Edit section&#39;s source code: Fizice"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/Fi%C8%99ier:CsCrystals.JPG" class="mw-file-description"><img alt="Y shaped yellowish crystal in glass ampoule, looking like the branch of a pine tree" src="//upload.wikimedia.org/wikipedia/commons/thumb/1/11/CsCrystals.JPG/250px-CsCrystals.JPG" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/11/CsCrystals.JPG/330px-CsCrystals.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/11/CsCrystals.JPG/500px-CsCrystals.JPG 2x" data-file-width="4000" data-file-height="3000" /></a><figcaption>Eșantion de cesiu-133 de mare puritate sub o atmosferă de <a href="/wiki/Argon" title="Argon">argon</a></figcaption></figure> <p>Cesiul este un <a href="/wiki/Metal" title="Metal">metal</a> foarte moale (are cea mai mică duritate pe <a href="/wiki/Scara_Mohs" class="mw-redirect" title="Scara Mohs">Scara Mohs</a> dintre toate elementele, de 0,2), <a href="/wiki/Ductilitate" title="Ductilitate">ductil</a>, de culoare alb-argintie, ce prezintă o tentă argintiu-aurie în prezența <a href="/wiki/Oxigen" title="Oxigen">oxigenului</a>.<sup id="cite_ref-USGS_11-1" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup> Are un <a href="/wiki/Punct_de_topire" title="Punct de topire">punct de topire</a> de 28,4&#160;°C, devenind astfel unul dintre singurele metale lichide la temperatura camerei, iar <a href="/wiki/Mercur_(element)" title="Mercur (element)">mercurul</a> este singurul metal cu temperatura de topire mai mică decât cesiul. <sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">&#91;</span>note 3<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-autogenerated1_7-1" class="reference"><a href="#cite_note-autogenerated1-7"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup> În plus, metalul are și cel mai redus <a href="/wiki/Punct_de_fierbere" title="Punct de fierbere">punct de fierbere</a>, după mercurul, dintre metalele, de 641&#160;°C.<sup id="cite_ref-RSC_16-0" class="reference"><a href="#cite_note-RSC-16"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> Compușii săi au culoarea albastră în timpul <a href="/wiki/Oxidare" title="Oxidare">arderii</a> într-o <a href="/wiki/Flac%C4%83r%C4%83" title="Flacără">flacără</a> deschisă.<sup id="cite_ref-CRC74_17-0" class="reference"><a href="#cite_note-CRC74-17"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> </p> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/Fi%C8%99ier:Cesium_ampoule_in_acrylic_cube.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/80/Cesium_ampoule_in_acrylic_cube.jpg/250px-Cesium_ampoule_in_acrylic_cube.jpg" decoding="async" width="220" height="223" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/80/Cesium_ampoule_in_acrylic_cube.jpg/330px-Cesium_ampoule_in_acrylic_cube.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/80/Cesium_ampoule_in_acrylic_cube.jpg/500px-Cesium_ampoule_in_acrylic_cube.jpg 2x" data-file-width="2213" data-file-height="2248" /></a><figcaption>Cub din acrilic cu cesiu, confecționat în scop educativ</figcaption></figure> <p>Cesiul formează și <a href="/wiki/Aliaj" title="Aliaj">aliaje</a> cu alte metale alcaline și cu <a href="/wiki/Aur" title="Aur">aurul</a> și amalgamuri chimice cu <a href="/wiki/Mercur_(element)" title="Mercur (element)">mercurul</a>. La temperaturi sub 650&#160;°C, acesta formează aliaje cu <a href="/wiki/Cobalt" title="Cobalt">cobaltul</a>, <a href="/wiki/Fier" title="Fier">fierul</a>, <a href="/wiki/Molibden" title="Molibden">molibdenul</a>, <a href="/wiki/Nichel" title="Nichel">nichelul</a>, <a href="/wiki/Platin%C4%83" title="Platină">platina</a>, <a href="/wiki/Tantal" title="Tantal">tantalul</a> și <a href="/wiki/Wolfram" title="Wolfram">wolframul</a>. Poate forma, totodată, și compuși intermetalici fotosensibili cu <a href="/wiki/Stibiu" title="Stibiu">stibiul</a>, <a href="/wiki/Galiu" title="Galiu">galiul</a>, <a href="/wiki/Indiu" title="Indiu">indiul</a> și <a href="/wiki/Toriu" class="mw-redirect" title="Toriu">toriul</a>.<sup id="cite_ref-USGS_11-2" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Cesiul <a href="/wiki/Miscibilitate" title="Miscibilitate">se poate amesteca</a> cu celălalte metale alcaline (excepție <a href="/wiki/Litiu" title="Litiu">litiul</a>), iar aliajul cu compoziția 41% cesiu, 47% <a href="/wiki/Potasiu" title="Potasiu">potasiu</a> și 12% <a href="/wiki/Sodiu" title="Sodiu">sodiu</a> are cel mai mic punct de topire dintre toate aliajele metalelor, de −78&#160;°C.<sup id="cite_ref-autogenerated1_7-2" class="reference"><a href="#cite_note-autogenerated1-7"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> Au mai fost studiate și alte amalgamuri: CsHg<sub>2</sub> (ce este de culoare neagră și posedă <a href="/wiki/Luciu" title="Luciu">luciu</a> metalic) și CsHg (ce este galben și posedă tot luciu metalic).<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">&#91;</span>16<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Chimice">Chimice</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=4" title="Modifică secțiunea: Chimice" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=4" title="Edit section&#39;s source code: Chimice"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><span><video id="mwe_player_0" poster="//upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Cesium_water.theora.ogv/220px--Cesium_water.theora.ogv.jpg" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="220" height="165" data-durationhint="15" data-mwtitle="Cesium_water.theora.ogv" data-mwprovider="wikimediacommons" resource="/wiki/Fi%C8%99ier:Cesium_water.theora.ogv"><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/9/9b/Cesium_water.theora.ogv/Cesium_water.theora.ogv.480p.vp9.webm" type="video/webm; codecs=&quot;vp9, opus&quot;" data-transcodekey="480p.vp9.webm" data-width="640" data-height="480" /><source src="//upload.wikimedia.org/wikipedia/commons/9/9b/Cesium_water.theora.ogv" type="video/ogg; codecs=&quot;theora, vorbis&quot;" data-width="640" data-height="480" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/9/9b/Cesium_water.theora.ogv/Cesium_water.theora.ogv.144p.mjpeg.mov" type="video/quicktime" data-transcodekey="144p.mjpeg.mov" data-width="192" data-height="144" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/9/9b/Cesium_water.theora.ogv/Cesium_water.theora.ogv.240p.vp9.webm" type="video/webm; codecs=&quot;vp9, opus&quot;" data-transcodekey="240p.vp9.webm" data-width="320" data-height="240" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/9/9b/Cesium_water.theora.ogv/Cesium_water.theora.ogv.360p.vp9.webm" type="video/webm; codecs=&quot;vp9, opus&quot;" data-transcodekey="360p.vp9.webm" data-width="480" data-height="360" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/9/9b/Cesium_water.theora.ogv/Cesium_water.theora.ogv.360p.webm" type="video/webm; codecs=&quot;vp8, vorbis&quot;" data-transcodekey="360p.webm" data-width="480" data-height="360" /></video></span><figcaption>Reacția dintre o infimă cantitate de cesiu și <a href="/wiki/Ap%C4%83" title="Apă">apă</a> rece este explozivă</figcaption></figure> <p>Cesiul metalic este foarte reactiv și foarte piroforic. În plus, se aprinde în mod spontan în <a href="/wiki/Aer" title="Aer">aer</a> și reacționează cu <a href="/wiki/Ap%C4%83" title="Apă">apa</a> la temperaturi reduse, în urma reacției având loc explozii relativ periculoase.<sup id="cite_ref-USGS_11-3" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Reacția cu apa <a href="/wiki/Solid" title="Solid">solidă</a> poate avea loc la temperaturi mai mici de −116&#160;°C.<sup id="cite_ref-autogenerated1_7-3" class="reference"><a href="#cite_note-autogenerated1-7"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup> Din cauza reactivității sale ridicate, este clasificat ca fiind un material periculos și nu poate fi transportat, ca și <a href="/wiki/Sodiu" title="Sodiu">sodiul</a>, decât în hidrocarburi saturate uscate, ca de exemplu în <a href="/w/index.php?title=Uleiuri_minerale&amp;action=edit&amp;redlink=1" class="new" title="Uleiuri minerale — pagină inexistentă">uleiuri minerale</a>. Mai poate fi păstrat și în atmosferele de gaze inerte, ca cea de <a href="/wiki/Argon" title="Argon">argon</a>, sau în fiole din sticlă de borsilicat sigilate cu vid. Când este păstrat în cantități mai mari de 100&#160;grame, cesiul este sigilat în containere din <a href="/wiki/O%C8%9Bel_inoxidabil" title="Oțel inoxidabil">oțel inoxidabil</a>.<sup id="cite_ref-USGS_11-4" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Caracteristicile chimice ale cesiului sunt similare cu cele ale metalelor alcaline, dar mai degrabă, acestea se asemănă cu cele ale <a href="/wiki/Rubidiu" title="Rubidiu">rubidiului</a>, elementul chimic situat deasupra cesiului în <a href="/wiki/Tabelul_periodic_al_elementelor" title="Tabelul periodic al elementelor">tabelul periodic al elementelor</a>.<sup id="cite_ref-greenwood_20-0" class="reference"><a href="#cite_note-greenwood-20"><span class="cite-bracket">&#91;</span>17<span class="cite-bracket">&#93;</span></a></sup> Însă, pot apărea mici diferențe între proprietățile chimice datorită masei atomice și a electropozitivității foarte mari.<sup id="cite_ref-HollemanAF_21-0" class="reference"><a href="#cite_note-HollemanAF-21"><span class="cite-bracket">&#91;</span>18<span class="cite-bracket">&#93;</span></a></sup> Cesiul este cel mai electropozitiv element cu izotopi stabili. <sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">&#91;</span>note 4<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-autogenerated1_7-4" class="reference"><a href="#cite_note-autogenerated1-7"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup> Ionii de cesiu sunt, de asemenea, grei și mai puțin duri decât al ionilor de metale alcaline. </p> <div class="mw-heading mw-heading3"><h3 id="Compuși"><span id="Compu.C8.99i"></span>Compuși</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=5" title="Modifică secțiunea: Compuși" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=5" title="Edit section&#39;s source code: Compuși"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/Fi%C8%99ier:CsCl_polyhedra.png" class="mw-file-description"><img alt="27 small grey spheres in 3 evenly spaced layers of nine. 8 spheres form a regular cube and 8 of those cubes form a larger cube. The grey spheres represent the caesium atoms. The center of each small cube is occupied by a small green sphere representing a chlorine atom. Thus, every chlorine is in the middle of a cube formed by caesium atoms and every caesium is in the middle of a cube formed by chlorine." src="//upload.wikimedia.org/wikipedia/commons/thumb/1/10/CsCl_polyhedra.png/250px-CsCl_polyhedra.png" decoding="async" width="150" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/10/CsCl_polyhedra.png/330px-CsCl_polyhedra.png 2x" data-file-width="1417" data-file-height="1417" /></a><figcaption>Modelul coordinării <a href="/wiki/Cub" title="Cub">cubice</a> a Cs și <a href="/wiki/Clor" title="Clor">Cl</a> în CsCl</figcaption></figure> <p>Cea mai mare parte a compușilor cesiului conțin <a href="/wiki/Cation" title="Cation">cationul</a> Cs<sup>+</sup> ce se poate combina prin legături ionice cu un mare număr de <a href="/wiki/Anion" title="Anion">anioni</a>. O excepție notabilă este anionul de <i>cesiură</i> (Cs<sup>-</sup>).<sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">&#91;</span>20<span class="cite-bracket">&#93;</span></a></sup> Alte câteva excepții sunt suboxizii (<a class="mw-selflink-fragment" href="#Oxizi">vezi secțiunea oxizi</a>). <a href="/wiki/Sare_(chimie)" title="Sare (chimie)">Sărurile</a> ionului Cs<sup>+</sup> sunt incolore, deși anionul în sine este colorat. Majoritatea acestora sunt higroscopice, dar acest fenomen este mai puțin prezent decât în cazul sărurilor altor metale alcaline. Fosfatul, acetatul, carbonatul, compușii halogenici, oxidul, azotatul și sulfatul de cesiu sunt solubili în <a href="/wiki/Ap%C4%83" title="Apă">apă</a>.<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> Sărurile duble (adică cele formate din mai mulți cationi și anioni diferiți) sunt adesea greu solubile; însă, această insolubilitate poate avea și aplicații. De exemplu, datorită solubilității scăzute a sulfatului de cesiu și <a href="/wiki/Aluminiu" title="Aluminiu">aluminiu</a>, compusul este folosit la purificarea cesiului din minereuri. Sărurile duble cu <a href="/wiki/Stibiu" title="Stibiu">stibiu</a> (ca de exemplu, <span class="chemf nowrap">CsSbCl<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />4</span></span>), <a href="/wiki/Bismut" title="Bismut">bismut</a>, <a href="/wiki/Cadmiu" title="Cadmiu">cadmiu</a>, <a href="/wiki/Cupru" title="Cupru">cupru</a>, <a href="/wiki/Fier" title="Fier">fier</a> și <a href="/wiki/Plumb" title="Plumb">plumb</a> sunt, de asemenea, puțin solubile.<sup id="cite_ref-USGS_11-5" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> </p><p><a href="/wiki/Hidroxid_de_cesiu" title="Hidroxid de cesiu">Hidroxidul de cesiu</a> (CsOH) este o <a href="/wiki/Baz%C4%83_(chimie)" title="Bază (chimie)">bază</a> foarte puternică și higroscopică.<sup id="cite_ref-greenwood_20-1" class="reference"><a href="#cite_note-greenwood-20"><span class="cite-bracket">&#91;</span>17<span class="cite-bracket">&#93;</span></a></sup> Compusul poate fi folosit la decaparea <a href="/wiki/Semiconductor" title="Semiconductor">semiconductoarelor</a>, cum sunt <a href="/wiki/Siliciu" title="Siliciu">siliciul</a> și <a href="/wiki/Germaniu" title="Germaniu">germaniul</a>.<sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup> Hidroxidul de cesiu a fost considerat de <a href="/wiki/Chimist" title="Chimist">chimiști</a> ca „cea mai puternică bază”, fapt datorat atracției slabe dintre ionul Cs<sup>+</sup> foarte greu și OH<sup>–</sup> mai ușor.<sup id="cite_ref-CRC74_17-1" class="reference"><a href="#cite_note-CRC74-17"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> CsOH este într-adevăr cea mai puternică <a href="/wiki/Teoria_acido-bazic%C4%83" title="Teoria acido-bazică">bază Arrhenius</a>, însă un număr de compuși care nu există în soluții apoase, precum <a href="/w/index.php?title=Amid%C4%83_de_sodiu&amp;action=edit&amp;redlink=1" class="new" title="Amidă de sodiu — pagină inexistentă">amida de sodiu</a> (NaNH<sub>2</sub>) și <a href="/w/index.php?title=N-butil-litiu&amp;action=edit&amp;redlink=1" class="new" title="N-butil-litiu — pagină inexistentă">n-butil-litiul</a> (C<sub>4</sub>H<sub>9</sub>Li), sunt baze și mai puternice.<sup id="cite_ref-greenwood_20-2" class="reference"><a href="#cite_note-greenwood-20"><span class="cite-bracket">&#91;</span>17<span class="cite-bracket">&#93;</span></a></sup> </p><p>Prin reacția unui amestec stoichiometric de cesiu și <a href="/wiki/Aur" title="Aur">aur</a> se formează compusul <a href="/wiki/Aurur%C4%83_de_cesiu" title="Aurură de cesiu">aurura de cesiu</a>. </p> <div class="mw-heading mw-heading4"><h4 id="Compuși_complecși"><span id="Compu.C8.99i_complec.C8.99i"></span>Compuși complecși</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=6" title="Modifică secțiunea: Compuși complecși" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=6" title="Edit section&#39;s source code: Compuși complecși"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Ca toți <a href="/wiki/Cation" title="Cation">cationii</a> <a href="/wiki/Metal" title="Metal">metalelor</a>, ionul Cs<sup>+</sup> formează compuși complecși în soluțiile bazelor Lewis. Adesea, din cauza greutății sale, Cs<sup>+</sup> adoptă numere de coordinare mai mari ca șase, acestea fiind tipice pentru cationii metalelor alcaline ușoare. Această tendință este deja evidențiată în <a href="/wiki/Clorur%C4%83_de_cesiu" title="Clorură de cesiu">clorura de cesiu</a> (CsCl), unde numărul de coordinare este opt. Moliciunea și numărul de coordinare mare al ionului Cs<sup>+</sup> sunt motive principale pentru separarea sa de alți cationi, putând fi folosit la separarea deșeurilor nucleare, unde <sup>137</sup>Cs<sup>+</sup> este separat de K<sup>+</sup> ce nu este radioactiv.<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Compuși_halogenați"><span id="Compu.C8.99i_halogena.C8.9Bi"></span>Compuși halogenați</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=7" title="Modifică secțiunea: Compuși halogenați" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=7" title="Edit section&#39;s source code: Compuși halogenați"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Clorur%C4%83_de_cesiu" title="Clorură de cesiu">Clorura de cesiu</a> (CsCl) cristalizează în sistemul cristalin <a href="/wiki/Cub" title="Cub">cubic</a>. Cunoscut și sub denumirea de „structura clorurii de cesiu” <sup id="cite_ref-HollemanAF_21-1" class="reference"><a href="#cite_note-HollemanAF-21"><span class="cite-bracket">&#91;</span>18<span class="cite-bracket">&#93;</span></a></sup>, acest model structural este compus dintr-o rețea cubică cu doi <a href="/wiki/Atom" title="Atom">atomi</a> la bază și cu numărul de coordinare opt; atomii de <a href="/wiki/Clor" title="Clor">clor</a> sunt dispuși deasupra rețelei, la marginea cubului, în timp ce atomii de cesiu stau dispuși în zona centrală a cristalului. Acest model este comun și pentru <a href="/wiki/Bromur%C4%83_de_cesiu" title="Bromură de cesiu">CsBr</a> și <a href="/wiki/Iodur%C4%83_de_cesiu" title="Iodură de cesiu">CsI</a>, dar și pentru mulți alți compuși ce nu conțin cesiu. În contrast, mulți alți compuși halogenați ale metalelor alcaline adoptă structura cubică a <a href="/wiki/Clorur%C4%83_de_sodiu" title="Clorură de sodiu">sării de bucătărie</a> (<a href="/wiki/Sodiu" title="Sodiu">Na</a><a href="/wiki/Clor" title="Clor">Cl</a>).<sup id="cite_ref-HollemanAF_21-2" class="reference"><a href="#cite_note-HollemanAF-21"><span class="cite-bracket">&#91;</span>18<span class="cite-bracket">&#93;</span></a></sup> Totuși, structura clorurii de cesiu este cea preferată de cesiu, deoarece Cs<sup>+</sup> are o rază atomică 174&#160;<a href="/wiki/Picometru" title="Picometru">pm</a> și Cl<sup>-</sup> de 181&#160;pm.<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Oxizi">Oxizi</h4><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=8" title="Modifică secțiunea: Oxizi" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=8" title="Edit section&#39;s source code: Oxizi"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/Fi%C8%99ier:Cs11O3_cluster.png" class="mw-file-description"><img alt="The stick and ball diagram shows three regular octahedra which are connected to the next one by one surface and the last one shares one surface with the first. All three have one edge in common. All eleven vertices are purple spheres representing caesium, and at the center of each octahedron is a small red sphere representing oxygen." src="//upload.wikimedia.org/wikipedia/commons/thumb/7/79/Cs11O3_cluster.png/100px-Cs11O3_cluster.png" decoding="async" width="100" height="102" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/79/Cs11O3_cluster.png/150px-Cs11O3_cluster.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/79/Cs11O3_cluster.png/200px-Cs11O3_cluster.png 2x" data-file-width="528" data-file-height="539" /></a><figcaption>Structura Cs<sub>11</sub>O<sub>3</sub></figcaption></figure> <p>Mai des decât celelalte metale alcaline, cesiul poate forma numeroși compuși binari cu <a href="/wiki/Oxigen" title="Oxigen">oxigenul</a>. De exemplu, când cesiul arde în <a href="/wiki/Aer" title="Aer">aer</a>, se formează superoxidul CsO<sub>2</sub>.<sup id="cite_ref-cotton_29-0" class="reference"><a href="#cite_note-cotton-29"><span class="cite-bracket">&#91;</span>25<span class="cite-bracket">&#93;</span></a></sup> Oxidul de cesiu „normal” (Cs<sub>2</sub>O), la care starea de oxidare este cea obișnuită pentru metalele alcaline (egală cu 1), formează <a href="/wiki/Cristal" title="Cristal">cristale</a> <a href="/wiki/Hexagon" title="Hexagon">hexagonale</a> de culoare galben-portocalie <sup id="cite_ref-CRC_30-0" class="reference"><a href="#cite_note-CRC-30"><span class="cite-bracket">&#91;</span>26<span class="cite-bracket">&#93;</span></a></sup> și este singurul oxid de tipul anti-clorură de cadmiu (CdCl<sub>2</sub>).<sup id="cite_ref-ReferenceA_31-0" class="reference"><a href="#cite_note-ReferenceA-31"><span class="cite-bracket">&#91;</span>27<span class="cite-bracket">&#93;</span></a></sup> Oxidul se vaporizează la 250&#160;°C iar la temperaturi mai mari de 400&#160;°C se descompune în cesiu metalic și <a href="/wiki/Peroxid" title="Peroxid">peroxid</a> de cesiu (Cs<sub>2</sub>O<sub>2</sub>).<sup id="cite_ref-autogenerated2_32-0" class="reference"><a href="#cite_note-autogenerated2-32"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> În afară de superoxidul și trioxidul de cesiu (CsO<sub>3</sub>),<sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">&#91;</span>29<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-34" class="reference"><a href="#cite_note-34"><span class="cite-bracket">&#91;</span>30<span class="cite-bracket">&#93;</span></a></sup> au fost studiați și alți suboxizi viu culorați.<sup id="cite_ref-Simon_35-0" class="reference"><a href="#cite_note-Simon-35"><span class="cite-bracket">&#91;</span>31<span class="cite-bracket">&#93;</span></a></sup> Printre aceștia se numără Cs<sub>7</sub>O, Cs<sub>4</sub>O, Cs<sub>11</sub>O<sub>3</sub> și Cs<sub>3</sub>O (negru-verzui <sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">&#91;</span>32<span class="cite-bracket">&#93;</span></a></sup>), CsO, Cs<sub>3</sub>O<sub>2</sub>,<sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">&#91;</span>33<span class="cite-bracket">&#93;</span></a></sup> precum și Cs<sub>7</sub>O<sub>2</sub>.<sup id="cite_ref-38" class="reference"><a href="#cite_note-38"><span class="cite-bracket">&#91;</span>34<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">&#91;</span>35<span class="cite-bracket">&#93;</span></a></sup> Cel din urmă poate fi încălzit sub vid pentru a genera Cs<sub>2</sub>O.<sup id="cite_ref-ReferenceA_31-1" class="reference"><a href="#cite_note-ReferenceA-31"><span class="cite-bracket">&#91;</span>27<span class="cite-bracket">&#93;</span></a></sup> Sunt cunoscuți, de asemenea, și compuși ai cesiului cu <a href="/wiki/Sulf" title="Sulf">sulful</a>, <a href="/wiki/Seleniu" title="Seleniu">seleniul</a> și <a href="/wiki/Telur" title="Telur">telurul</a>, dar sunt foarte puțin studiați și nu există date referitoare la aceștia.<sup id="cite_ref-USGS_11-6" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Izotopi">Izotopi</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=9" title="Modifică secțiunea: Izotopi" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=9" title="Edit section&#39;s source code: Izotopi"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <div role="note" class="dezambiguizare rellink boilerplate seealso">Articol principal: <a href="/w/index.php?title=Izotopii_cesiului&amp;action=edit&amp;redlink=1" class="new" title="Izotopii cesiului — pagină inexistentă">Izotopii cesiului</a></div><style data-mw-deduplicate="TemplateStyles:r16785627">@media screen{html.skin-theme-clientpref-night .mw-parser-output .rellink{display:flex;gap:0.5ch}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .rellink{display:flex;gap:0.5ch}}</style> <p>În total, se cunosc 39 de <a href="/wiki/Izotop" title="Izotop">izotopi</a> de cesiu ce oscilează între valorile de 112 și 151 în <a href="/wiki/Mas%C4%83_atomic%C4%83" title="Masă atomică">masa atomică</a>. Câteva dintre aceștia pot fi sintetizați cu ajutorul elementelor mai ușoare; în <a href="/wiki/Natur%C4%83" title="Natură">natură</a>, aceste reacții au loc și în timpul procedeelor din interiorul <a href="/wiki/Stea" title="Stea">stelelor bătrâne</a>,<sup id="cite_ref-40" class="reference"><a href="#cite_note-40"><span class="cite-bracket">&#91;</span>36<span class="cite-bracket">&#93;</span></a></sup> precum și în interiorul <a href="/wiki/Supernov%C4%83" title="Supernovă">supernovelor</a>.<sup id="cite_ref-41" class="reference"><a href="#cite_note-41"><span class="cite-bracket">&#91;</span>37<span class="cite-bracket">&#93;</span></a></sup> Totuși, singurul izotop stabil este <sup>133</sup>Cs, ce are 78 de <a href="/wiki/Neutron" title="Neutron">neutroni</a>. Deși acesta are un spin nuclear ridicat (7/2+), studiile rezonanței magnetice nucleare pot fi făcute la o frecvență de rezonanță de 11,7&#160;<a href="/wiki/Hertz" title="Hertz">MHz</a>.<sup id="cite_ref-NMR_42-0" class="reference"><a href="#cite_note-NMR-42"><span class="cite-bracket">&#91;</span>38<span class="cite-bracket">&#93;</span></a></sup> </p> <figure typeof="mw:File/Thumb"><a href="/wiki/Fi%C8%99ier:Cs-137-decay.svg" class="mw-file-description"><img alt="A graph showing the energetics of caesium-137 (nuclear spin: I=7/2+, half-life of about 30 years) decay. With a 94.6% probability, it decays by a 512 keV beta emission into barium-137m (I=11/2-, t=2.55min); this further decays by a 662 keV gamma emission with an 85.1% probability into barium-137 (I=3/2+). Alternatively, caesium-137 may decay directly into barium-137 by a 0.4% probability beta emission." src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Cs-137-decay.svg/250px-Cs-137-decay.svg.png" decoding="async" width="250" height="138" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Cs-137-decay.svg/500px-Cs-137-decay.svg.png 1.5x" data-file-width="624" data-file-height="345" /></a><figcaption>Descompunerea cesiu-137</figcaption></figure> <p>Izotopul radioactiv <sup>135</sup>Cs are un <a href="/wiki/Dezintegrare" class="mw-disambig" title="Dezintegrare">timp de înjumătățire</a> de aproximativ 2,3&#160;milioane de <a href="/wiki/An" title="An">ani</a>, în timp ce izotopii <sup>137</sup>Cs și <sup>134</sup>Cs au un timp de înjumătățire de 30 și respectiv 2&#160;ani. <sup>137</sup>Cs se descompune în izotopul cu viață scurtă <sup>137m</sup>Ba prin radiații beta, iar cel din urmă ajunge la forma non-radioactivă cunoscută de <a href="/wiki/Bariu" title="Bariu">bariu</a>. În acest timp, <sup>134</sup>Cs se transformă în <sup>134</sup>Ba în mod direct. Izotopii de cesiu cu numerele de masă 129, 131, 132 și 136 au un timp de înjumătățire cuprins între o zi și două săptămâni, în timp ce alți izotopi au timpuri de înjumătățire cuprinse între o fracțiune de <a href="/wiki/Secund%C4%83" title="Secundă">secundă</a> și o secundă. Însă, mai sunt cunoscuți cel puțin 21 de izomeri nucleari metastabili. În afară de <sup>134m</sup>Cs (cu un timp de înjumătățire de doar o <a href="/wiki/Or%C4%83" title="Oră">oră</a>), toți sunt foarte instabili, cu timpi de jumătățire de aproximativ câteva minute sau chiar mai puțin.<sup id="cite_ref-43" class="reference"><a href="#cite_note-43"><span class="cite-bracket">&#91;</span>39<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-nuclidetable_44-0" class="reference"><a href="#cite_note-nuclidetable-44"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> Izotopul <sup>135</sup>Cs este unul dintre <a href="/wiki/Produs_de_fisiune" title="Produs de fisiune">produșii de fisiune</a> a <a href="/wiki/Uraniu" title="Uraniu">uraniului</a> ce se poate forma în reactori nucleari.<sup id="cite_ref-45" class="reference"><a href="#cite_note-45"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> Totuși, <a href="/wiki/Produs_de_fisiune" title="Produs de fisiune">produsul de fisiune</a> este redus în majoritatea reactorilor datorită <sup>135</sup>Xe, o adevărată „otravă” pentru <a href="/wiki/Neutron" title="Neutron">neutroni</a>, și se transformă în <sup>136</sup>Xe înainte de dezintegrarea ce are ca produs <sup>135</sup>Cs.<sup id="cite_ref-46" class="reference"><a href="#cite_note-46"><span class="cite-bracket">&#91;</span>42<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-47" class="reference"><a href="#cite_note-47"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup> Datorită descompunerii sale în urma cărora se obține <sup>137m</sup>Ba, izotopul <sup>137</sup>Cs este un puternic emițător de radiații gama.<sup id="cite_ref-48" class="reference"><a href="#cite_note-48"><span class="cite-bracket">&#91;</span>44<span class="cite-bracket">&#93;</span></a></sup> Timpul său de înjumătățire acesta este principalul <a href="/wiki/Produs_de_fisiune" title="Produs de fisiune">produs de fisiune</a> cu viață medie (un alt exemplu de acest fel este <sup>90</sup><a href="/wiki/Stron%C8%9Biu" title="Stronțiu">Sr</a>).<sup id="cite_ref-49" class="reference"><a href="#cite_note-49"><span class="cite-bracket">&#91;</span>45<span class="cite-bracket">&#93;</span></a></sup> De exmplu, <sup>137</sup>Cs și <sup>90</sup>Sr generează cea mai mare sursă radioactivă din zona <a href="/wiki/Cernob%C3%AEl" title="Cernobîl">Cernobîlului</a>.<sup id="cite_ref-50" class="reference"><a href="#cite_note-50"><span class="cite-bracket">&#91;</span>46<span class="cite-bracket">&#93;</span></a></sup> Este puțin probabil ca <sup>137</sup>Cs să poată fi creat prin captură nucleară (datorită ratei de captură mici), iar ca rezultat nu trebuie să fie dezintegrat.<sup id="cite_ref-51" class="reference"><a href="#cite_note-51"><span class="cite-bracket">&#91;</span>47<span class="cite-bracket">&#93;</span></a></sup> Aproape tot cesiul produs prin fisiune nucleară provine prin dezintegrarea beta a <a href="/wiki/Produs_de_fisiune" title="Produs de fisiune">produșilor de fisiune</a> mai bogați în <a href="/wiki/Neutron" title="Neutron">neutroni</a>, printre care se numără și <a href="/wiki/Izotopii_iodului" title="Izotopii iodului">izotopii iodului</a> și <a href="/wiki/Izotopii_xenonului" title="Izotopii xenonului">ai xenonului</a>.<sup id="cite_ref-52" class="reference"><a href="#cite_note-52"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup> Din cauza faptului că <a href="/wiki/Iod" title="Iod">iodul</a> și <a href="/wiki/Xenon" title="Xenon">xenonul</a> sunt volatili și difuzează prin intermediul combustibilului nuclear și al <a href="/wiki/Aer" title="Aer">aerului</a>, cesiul radioactiv este creat, de obicei, la o anumită depărtare de locul fisiunii.<sup id="cite_ref-53" class="reference"><a href="#cite_note-53"><span class="cite-bracket">&#91;</span>49<span class="cite-bracket">&#93;</span></a></sup> Odată cu începutul testării <a href="/wiki/Arm%C4%83_nuclear%C4%83" title="Armă nucleară">armelor nucleare</a> din jurul anului <a href="/wiki/1945" title="1945">1945</a>, cantități de <sup>137</sup>Cs au fost emise în <a href="/wiki/Atmosfer%C4%83" title="Atmosferă">atmosferă</a>, iar acestea au revenit pe suprafața <a href="/wiki/Terra" class="mw-redirect" title="Terra">Terrei</a> prin precipități radioactive.<sup id="cite_ref-USGS_11-7" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Abundență_naturală"><span id="Abunden.C8.9B.C4.83_natural.C4.83"></span>Abundență naturală</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=10" title="Modifică secțiunea: Abundență naturală" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=10" title="Edit section&#39;s source code: Abundență naturală"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fi%C8%99ier:Pollucite-RoyalOntarioMuseum-Jan18-09.jpg" class="mw-file-description"><img alt="A white mineral, from which white and pale pink crystals protrude" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Pollucite-RoyalOntarioMuseum-Jan18-09.jpg/250px-Pollucite-RoyalOntarioMuseum-Jan18-09.jpg" decoding="async" width="220" height="137" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Pollucite-RoyalOntarioMuseum-Jan18-09.jpg/330px-Pollucite-RoyalOntarioMuseum-Jan18-09.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e9/Pollucite-RoyalOntarioMuseum-Jan18-09.jpg/500px-Pollucite-RoyalOntarioMuseum-Jan18-09.jpg 2x" data-file-width="3080" data-file-height="1920" /></a><figcaption>Polucitul, un <a href="/wiki/Mineral" title="Mineral">mineral</a> de cesiu </figcaption></figure> <p>Cesiul este un <a href="/wiki/Element_chimic" title="Element chimic">element</a> relativ rar în natură, iar măsurătorile determinate au estimat concentrația sa la aproximativ 3&#160;<a href="/wiki/Ppm" title="Ppm">părți per milion</a> din crusta <a href="/wiki/P%C4%83m%C3%A2nt" title="Pământ">Pământului</a>.<sup id="cite_ref-54" class="reference"><a href="#cite_note-54"><span class="cite-bracket">&#91;</span>50<span class="cite-bracket">&#93;</span></a></sup> Această răspândire îi atribuie cesiului locul 45 între elementele chimice din punctul de vedere al prezenței sale în natură, și locul 36 printre <a href="/wiki/Metal" title="Metal">metale</a>. Cu toate acestea, cesiul este mai abundent decât elemente ca <a href="/wiki/Stibiu" title="Stibiu">stibiul</a>, <a href="/wiki/Cadmiu" title="Cadmiu">cadmiul</a>, <a href="/wiki/Staniu" title="Staniu">staniul</a> și <a href="/wiki/Wolfram" title="Wolfram">wolframul</a>, și mult mai abundent decât <a href="/wiki/Mercur_(element)" title="Mercur (element)">mercurul</a> și <a href="/wiki/Argint" title="Argint">argintul</a>, care au o importanță majoră în industrie. Însă, cesiul este cu 30 de ori mai rar decât <a href="/wiki/Rubidiu" title="Rubidiu">rubidiul</a>, cu care împarte proprietăți chimice similare și se află deasupra cesiului în Sistemul Periodic.<sup id="cite_ref-USGS_11-8" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> </p><p>Datorită mărimii razei sale ionice, cesiul este unul dintre așa-zisele "elemente incompatibile".<sup id="cite_ref-55" class="reference"><a href="#cite_note-55"><span class="cite-bracket">&#91;</span>51<span class="cite-bracket">&#93;</span></a></sup> În timpul solidificării magmei, cesiul este concentrat în fază <a href="/wiki/Lichid" title="Lichid">lichidă</a>, așa că este printre ultimele ce <a href="/wiki/Cristal" title="Cristal">cristalizează</a>. Prin urmare, cele mai mari depozite ale elementului sunt <a href="/wiki/Pegmatit" title="Pegmatit">pegmatitele</a>. Din cauza faptului că cesiul nu este un substituent așa puternic și nu substituie <a href="/wiki/Potasiu" title="Potasiu">potasiul</a> așa de repede cum face <a href="/wiki/Rubidiu" title="Rubidiu">rubidiul</a>, <a href="/wiki/Mineral" title="Mineral">mineralele</a> evaporitice <a href="/wiki/Silvin%C4%83" title="Silvină">silvină</a> (KCl) și <a href="/w/index.php?title=Carnalit&amp;action=edit&amp;redlink=1" class="new" title="Carnalit — pagină inexistentă">carnalit</a> (KMgCl<sub>3</sub>•6H<sub>2</sub>O) conțin numai 0,002&#160;% cesiu. Cesiul se găsește în puține <a href="/wiki/Mineral" title="Mineral">minerale</a>. Mici cantități de cesiu pot apărea în <a href="/wiki/Beril" title="Beril">beril</a> ((<span class="chemf nowrap">Be<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />3</span>Al<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>(SiO<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />3</span>)<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />6</span></span>), în <a href="/w/index.php?title=Avogadrit&amp;action=edit&amp;redlink=1" class="new" title="Avogadrit — pagină inexistentă">avogadrit</a> (<span class="chemf nowrap">(K,Cs)BF<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />4</span></span>), mai mult de 15&#160;wt% Cs<sub>2</sub>O în <a href="/w/index.php?title=Pezotait&amp;action=edit&amp;redlink=1" class="new" title="Pezotait — pagină inexistentă">pezotait</a>, Cs(Be<sub>2</sub>Li)Al<sub>2</sub>Si<sub>6</sub>O<sub>18</sub>), mai mult de 8,4&#160;wt% Cs<sub>2</sub>O în mineralul rar <a href="/w/index.php?title=Londonit&amp;action=edit&amp;redlink=1" class="new" title="Londonit — pagină inexistentă">londonit</a> (<span class="chemf nowrap">(Cs,K)Al<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />4</span>Be<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />4</span>(B,Be)<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />12</span>O<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />28</span></span>), și cantități foarte mici în <a href="/w/index.php?title=Rodizit&amp;action=edit&amp;redlink=1" class="new" title="Rodizit — pagină inexistentă">rodizit</a>.<sup id="cite_ref-USGS_11-9" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Cel mai important mineral ce conține cesiu este <a href="/wiki/Polucit" title="Polucit">polucitul</a> <span class="chemf nowrap">Cs(AlSi<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>O<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />6</span>)</span>, ce se formează în câteva zone cu <a href="/wiki/Pegmatit" title="Pegmatit">pegmatite</a> din lume, unde poate fi asociat cu minerale conținătoare de <a href="/wiki/Litiu" title="Litiu">litiu</a>, cum ar fi <a href="/w/index.php?title=Lepidolit&amp;action=edit&amp;redlink=1" class="new" title="Lepidolit — pagină inexistentă">lepidolitul</a> și <a href="/w/index.php?title=Petalit&amp;action=edit&amp;redlink=1" class="new" title="Petalit — pagină inexistentă">petalitu</a>.<sup id="cite_ref-Cerny_56-0" class="reference"><a href="#cite_note-Cerny-56"><span class="cite-bracket">&#91;</span>52<span class="cite-bracket">&#93;</span></a></sup> </p><p>Una dintre cele mai semnificative și bogate surse de concentrare a <a href="/wiki/Metal" title="Metal">metalului</a> este Mina Tanco, situată lângă Lacul Bernic din <a href="/wiki/Manitoba" title="Manitoba">Manitoba</a>, <a href="/wiki/Canada" title="Canada">Canada</a>. Se crede că depozitele de aici conțin aproximativ 350.000&#160;<a href="/wiki/Ton%C4%83" title="Tonă">tone metrice</a> de minereu de polucit, reprezentând două treimi din rezervele mondiale.<sup id="cite_ref-Cerny_56-1" class="reference"><a href="#cite_note-Cerny-56"><span class="cite-bracket">&#91;</span>52<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-USGS-Cs2_57-0" class="reference"><a href="#cite_note-USGS-Cs2-57"><span class="cite-bracket">&#91;</span>53<span class="cite-bracket">&#93;</span></a></sup> Deși procentul stoichiometric al cesiului din polucit este 42,6&#160;%, mostrele pure a acestui mineral din Mina Tanco conțin doar 34&#160;% cesiu, iar media este de 24&#160;wt%.<sup id="cite_ref-USGS-Cs2_57-1" class="reference"><a href="#cite_note-USGS-Cs2-57"><span class="cite-bracket">&#91;</span>53<span class="cite-bracket">&#93;</span></a></sup> Polucitul comercial conține doar 19% cesiu.<sup id="cite_ref-58" class="reference"><a href="#cite_note-58"><span class="cite-bracket">&#91;</span>54<span class="cite-bracket">&#93;</span></a></sup> Depozitele de pegmatite din zona Bikita din <a href="/wiki/Zimbabwe" title="Zimbabwe">Zimbabwe</a> sunt exploatate pentru a scoate la suprafață <a href="/w/index.php?title=Petalit&amp;action=edit&amp;redlink=1" class="new" title="Petalit — pagină inexistentă">petalitul</a>, însă aici se găsesc și cantități semnificative de polucit. Totodată, cantități notabile de polucit mai sunt extrase și în Deșertul Karibib, din <a href="/wiki/Namibia" title="Namibia">Namibia</a>.<sup id="cite_ref-USGS-Cs2_57-2" class="reference"><a href="#cite_note-USGS-Cs2-57"><span class="cite-bracket">&#91;</span>53<span class="cite-bracket">&#93;</span></a></sup> Luând în considerare rata extracției la nivel mondial și a producției de cesiu (de aproximativ 5 spre 10&#160;tone metrice pe an), aceste rezerve se vor termina peste mii de ani.<sup id="cite_ref-USGS_11-10" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Producție"><span id="Produc.C8.9Bie"></span>Producție</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=11" title="Modifică secțiunea: Producție" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=11" title="Edit section&#39;s source code: Producție"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Exploatarea rezervelor de <a href="/wiki/Polucit" title="Polucit">polucit</a> este un procedeu selectiv și se face la scară redusă, în ciuda principalelor procedee de obținere a <a href="/wiki/Metal" title="Metal">metalelor</a>. Minereul este sfărâmat și sortat manual, iar apoi cesiul este extras prin trei metode: asimilarea cu <a href="/wiki/Acid" title="Acid">acid</a>, descompunerea alcalină și reducerea directă.<sup id="cite_ref-USGS_11-11" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Burt_59-0" class="reference"><a href="#cite_note-Burt-59"><span class="cite-bracket">&#91;</span>55<span class="cite-bracket">&#93;</span></a></sup> </p><p>În timpul asimilării cu acid, <a href="/wiki/Roc%C4%83" title="Rocă">roca</a> este dizolvată cu acizi puternici, printre care se numără și <a href="/wiki/Acid_clorhidric" title="Acid clorhidric">acidul clorhidric</a> (HCl), <a href="/wiki/Acid_sulfuric" title="Acid sulfuric">acidul sulfuric</a> (<span class="chemf nowrap">H<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>SO<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />4</span></span>), <a href="/wiki/Acid_bromhidric" title="Acid bromhidric">acidul bromhidric</a> (HBr) și <a href="/wiki/Acid_fluorhidric" title="Acid fluorhidric">acidul fluorhidric</a> (HF). Prin reacția cu acidul clorhidric, se produc câteva cloruri, printre care se numără și o clorură dublă insolubile ce precipită sub formă de clorură de <a href="/wiki/Stibiu" title="Stibiu">stibiu</a> și cesiu (<span class="chemf nowrap">Cs<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />4</span>SbCl<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />7</span></span>), ori clorură de cesiu și <a href="/wiki/Iod" title="Iod">iod</a> (<span class="chemf nowrap">Cs<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>ICl</span>), sau hexaclorocerat de cesiu (<span class="chemf nowrap">Cs<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>(CeCl<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />6</span>)</span>). După separare, precipitatele pure sunt descompuse, iar, după evaporarea <a href="/wiki/Ap%C4%83" title="Apă">apei</a> existente, se obține <a href="/wiki/Clorur%C4%83_de_cesiu" title="Clorură de cesiu">clorura de cesiu</a>. Dacă se folosește metoda cu acid sulfuric, atunci în urma reacției rezultă direct <a href="/wiki/Alaun" title="Alaun">alaun</a> de cesiu și <a href="/wiki/Aluminiu" title="Aluminiu">aluminiu</a> (<span class="chemf nowrap">CsAl(SO<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />4</span>)<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>•12H<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>O</span>). <a href="/wiki/Sulfat_de_aluminiu" title="Sulfat de aluminiu">Sulfatul de aluminiu</a> din alaun este convertit prin prăjire cu <a href="/wiki/Carbon" title="Carbon">carbon</a> în <a href="/wiki/Oxid_de_aluminiu" title="Oxid de aluminiu">oxid de aluminiu</a> insolubil , iar produsul este levigat cu <a href="/wiki/Ap%C4%83" title="Apă">apă</a> pentru a rezulta o soluție de <span class="chemf nowrap">Cs<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>SO<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />4</span></span>.<sup id="cite_ref-USGS_11-12" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Prăjirea polucitului cu <a href="/wiki/Carbonat_de_calciu" title="Carbonat de calciu">carbonat de calciu</a> și <a href="/wiki/Clorur%C4%83_de_calciu" title="Clorură de calciu">clorură de calciu</a> produce silicați de <a href="/wiki/Calciu" title="Calciu">calciu</a> insolubili și clorură de cesiu solubilă. Levigarea cu <a href="/wiki/Ap%C4%83" title="Apă">apă</a> sau cu <a href="/wiki/Amoniac" title="Amoniac">amoniac</a> diluat (<span class="chemf nowrap">NH<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />4</span>OH</span>) produce o <a href="/wiki/Solu%C8%9Bie" class="mw-redirect" title="Soluție">soluție</a> de clorură de cesiu. Această soluție poate fi evaporată pentru a se obține clorura de cesiu. Cesiul ar putea fi produs direct prin reducerea minereurilor cu <a href="/wiki/Potasiu" title="Potasiu">potasiu</a>, <a href="/wiki/Sodiu" title="Sodiu">sodiu</a> sau <a href="/wiki/Calciu" title="Calciu">calciu</a> în <a href="/wiki/Vid" title="Vid">vid</a>, dar această metodă nu este folosită.<sup id="cite_ref-USGS_11-13" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Majoritatea cesiului aflat în minereuri (sub formă de <a href="/wiki/Sare_(chimie)" title="Sare (chimie)">săruri</a>) este convertit direct în fromatul de cesiu (HCOO<sup>−</sup>Cs<sup>+</sup>), ce are anumite aplicații în uleiurile pentru forări. Pentru a suplimenta dezvoltarea pe piață, compania Cabot Corporation a construit o fabrică în <a href="/wiki/1997" title="1997">1997</a> la Mina Tanco din <a href="/wiki/Manitoba" title="Manitoba">Manitoba</a>, <a href="/wiki/Canada" title="Canada">Canada</a>, cu o capacitate de 12 000 de <a href="/wiki/Baril" class="mw-redirect" title="Baril">barili</a> (1,900 m<sub>3</sub>) de format de cesiu pe an.<sup id="cite_ref-60" class="reference"><a href="#cite_note-60"><span class="cite-bracket">&#91;</span>56<span class="cite-bracket">&#93;</span></a></sup> Compușii primari comerciali ai cesiului pe scară redusă sunt clorura și azotatul de cesiu.<sup id="cite_ref-CEC_61-0" class="reference"><a href="#cite_note-CEC-61"><span class="cite-bracket">&#91;</span>57<span class="cite-bracket">&#93;</span></a></sup> Alternativ, cesiul metalic poate fi obținut prin purificarea compușilor derivați din minereu. Clorura de cesiu și respectiv clorurile halogenilor pot fi reduse la 700-800&#160;°C cu calciu sau cu <a href="/wiki/Bariu" title="Bariu">bariu</a>, după care rezultă distilarea cesiului metalic. În același mod, aluminatul, carbonatul și hidroxidul de cesiu pot fi reduși cu <a href="/wiki/Magneziu" title="Magneziu">magneziu</a>.<sup id="cite_ref-USGS_11-14" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Totodată, metalul poate fi izolat prin <a href="/wiki/Electroliz%C4%83" title="Electroliză">electroliza</a> <a href="/w/index.php?title=Cianur%C4%83_de_cesiu&amp;action=edit&amp;redlink=1" class="new" title="Cianură de cesiu — pagină inexistentă">cianurii de cesiu</a> (CsCN) în <a href="/w/index.php?title=Topitur%C4%83&amp;action=edit&amp;redlink=1" class="new" title="Topitură — pagină inexistentă">topitură</a>. Cesiul foarte pur mai poate fi obținut prin descompunerea termic la 390&#160;°C a nitrurii de cesiu <span class="chemf nowrap">CsN<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />3</span></span>, ce se produce prin reacția dintre <a href="/wiki/Sulfat_de_cesiu" title="Sulfat de cesiu">sulfat de cesiu</a> și <a href="/w/index.php?title=Nitrur%C4%83_de_bariu&amp;action=edit&amp;redlink=1" class="new" title="Nitrură de bariu — pagină inexistentă">nitrură de bariu</a>.<sup id="cite_ref-Burt_59-1" class="reference"><a href="#cite_note-Burt-59"><span class="cite-bracket">&#91;</span>55<span class="cite-bracket">&#93;</span></a></sup> În vid, dicromatul de cesiu poate reacționa cu <a href="/wiki/Zirconiu" title="Zirconiu">zirconiul</a> formând cesiu metalic pur fără alți produși <a href="/wiki/Gaz" title="Gaz">gazoși</a>.<sup id="cite_ref-CEC_61-1" class="reference"><a href="#cite_note-CEC-61"><span class="cite-bracket">&#91;</span>57<span class="cite-bracket">&#93;</span></a></sup> </p> <dl><dd><span class="chemf nowrap">Cs<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>Cr<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>O<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />7</span></span> + 2 <span class="chemf nowrap">Zr</span> → 2 <span class="chemf nowrap">Cs</span> + 2 <span class="chemf nowrap">ZrO<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span></span>+ <span class="chemf nowrap">Cr<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>O<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />3</span></span></dd></dl> <p>Prețul cesiului de puritate 99,8% în <a href="/wiki/2009" title="2009">2009</a> era de aproximativ 10 <a href="/wiki/Dolar_american" title="Dolar american">dolari</a> pe <a href="/wiki/Gram" title="Gram">gram</a>, însă, prețurile compușilor de cesiu sunt vizibil mai ieftine.<sup id="cite_ref-USGS-Cs2_57-3" class="reference"><a href="#cite_note-USGS-Cs2-57"><span class="cite-bracket">&#91;</span>53<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Aplicații"><span id="Aplica.C8.9Bii"></span>Aplicații</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=12" title="Modifică secțiunea: Aplicații" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=12" title="Edit section&#39;s source code: Aplicații"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Forări_petroliere"><span id="For.C4.83ri_petroliere"></span>Forări petroliere</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=13" title="Modifică secțiunea: Forări petroliere" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=13" title="Edit section&#39;s source code: Forări petroliere"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Cea mai modernă și largă utilizare a cesiului non-radioactiv este pentru crearea formatului numit format de cesiu, ce este un ulei de bază pentru forare.<sup id="cite_ref-USGS_11-15" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Soluțiile apoase de format de cesiu (HCOO<sup>–</sup>Cs<sup>+</sup>) — ce pot fi făcute prin reacția dintre <a href="/wiki/Hidroxid_de_cesiu" title="Hidroxid de cesiu">hidroxidul de cesiu</a> și <a href="/wiki/Acid_formic" title="Acid formic">acidul formic</a> — au început să fie folosite ca uleiuri pentru forat încă din preajma anilor <a href="/wiki/1990" title="1990">1990</a>. Funcția formatului de cesiu folosit ca ulei de forat este de a lubrifia burghiele pentru găurire, pentru a ajuta ca roca să fie taiată mai ușor și de a menține presiunea exercitată din timpul forării sondelor petroliere.<sup id="cite_ref-USGS_11-16" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Densitatea ridicată a saramurilor ce conțin formatul de cesiu (mai mare de 2,3&#160;g/cm<sup>3</sup>),<sup id="cite_ref-Down_62-0" class="reference"><a href="#cite_note-Down-62"><span class="cite-bracket">&#91;</span>58<span class="cite-bracket">&#93;</span></a></sup> în care se pot regăsi și resturi ale altor compuși de cesiu, reduce toxicitatea solidelor cu densitate mare aflate în uleiul de forare. Acest aspect constituie un avantaj din punct de vedere tehnologic, ingineresc și natural. Spre deosebire de majoritatea componenților din lichizii grei, formatul de cesiu nu dăunează mediului natural.<sup id="cite_ref-Down_62-1" class="reference"><a href="#cite_note-Down-62"><span class="cite-bracket">&#91;</span>58<span class="cite-bracket">&#93;</span></a></sup> Saramurile de format de cesiu pot fi amestecate formații de potasiu și sodiu pentru ca densitatea să scadă, devenind astfel mai ușoare decât apa (1&#160;g/cm<sup>3</sup>). În plus, acestea sunt biodegradabile și nerecuperabile, dar pot fi reciclate întrucât sunt relativ scumpe (aproximativ 4.000&#160;<a href="/wiki/Dolar_american" title="Dolar american">USD</a> per <a href="/wiki/Baril_de_petrol" title="Baril de petrol">baril</a>).<sup id="cite_ref-63" class="reference"><a href="#cite_note-63"><span class="cite-bracket">&#91;</span>59<span class="cite-bracket">&#93;</span></a></sup> Formații alcalini nu sunt periculoși și nu dăunează produsului finit, astfel metalele nu sunt supuse coroziunii.<sup id="cite_ref-USGS_11-17" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Generator_de_energie_și_putere"><span id="Generator_de_energie_.C8.99i_putere"></span>Generator de energie și putere</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=14" title="Modifică secțiunea: Generator de energie și putere" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=14" title="Edit section&#39;s source code: Generator de energie și putere"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Generatoarele termoionice cu <a href="/wiki/Vapori" title="Vapori">vapori</a> de cesiu sunt generatoare cu putere slabă ce convertesc energia termică în energie electrică. În tuburile cu vid cu doi electrozi (ce au rolul de convertor), cesiul neutralizează spațiul de încărcare ce se adună în jurul <a href="/wiki/Catod" title="Catod">catodului</a>, iar în aceste fel se îmbunătățește <a href="/wiki/Flux" title="Flux">fluxul</a> de electroni emiși.<sup id="cite_ref-64" class="reference"><a href="#cite_note-64"><span class="cite-bracket">&#91;</span>60<span class="cite-bracket">&#93;</span></a></sup> Cesiul mai este important și pentru proprietățile sale <a href="/wiki/Efect_fotoelectric" title="Efect fotoelectric">foto-emisive</a>, prin care energia luminii este convertită în curent electric. Mai este folosit și în <a href="/wiki/Celul%C4%83_solar%C4%83" title="Celulă solară">panourile solare</a>, deoarece catozii pe bază de cesiu, cum ar fi cel din <span class="chemf nowrap">K<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>CsSb</span>, au o <a href="/wiki/Tensiune" class="mw-disambig" title="Tensiune">tensiune de prag</a> pentru emisia <a href="/wiki/Electron" title="Electron">electronilor</a> foarte redusă.<sup id="cite_ref-65" class="reference"><a href="#cite_note-65"><span class="cite-bracket">&#91;</span>61<span class="cite-bracket">&#93;</span></a></sup> Prin dispozitivele foto-emisive pe bază de cesiu menționăm aparatele pentru <a href="/wiki/Recunoa%C8%99terea_optic%C4%83_a_caracterelor" title="Recunoașterea optică a caracterelor">recunoașterea optică a caracterelor</a>, fotomultiplicatorii și camere video (mai exact, tubul de la acestea).<sup id="cite_ref-66" class="reference"><a href="#cite_note-66"><span class="cite-bracket">&#91;</span>62<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-67" class="reference"><a href="#cite_note-67"><span class="cite-bracket">&#91;</span>63<span class="cite-bracket">&#93;</span></a></sup> În ciuda acestor fapte, elementele precum <a href="/wiki/Germaniu" title="Germaniu">germaniul</a>, <a href="/wiki/Rubidiu" title="Rubidiu">rubidiul</a>, <a href="/wiki/Seleniu" title="Seleniu">seleniul</a>, <a href="/wiki/Siliciu" title="Siliciu">siliciul</a>, <a href="/wiki/Telur" title="Telur">telurul</a> și altele pot substitui cesiul din materialele fotosensibile.<sup id="cite_ref-USGS_11-18" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Cristalele <a href="/wiki/Iodur%C4%83_de_cesiu" title="Iodură de cesiu">iodurii de cesiu</a> (CsI), <a href="/wiki/Bromur%C4%83_de_cesiu" title="Bromură de cesiu">bromurii de cesiu</a> (CsBr) ȘI <a href="/wiki/Fluorur%C4%83_de_cesiu" title="Fluorură de cesiu">fluorurii de cesiu</a> (CsF) sunt folosite în scinilatoare pentru exploatarea minieră și pentru cercetarea particulelor fizice, deoarece sunt adaptate pentru detectarea radiațiilor gama și a <a href="/wiki/Raze_X" class="mw-redirect" title="Raze X">razelor X</a>. Fiind un <a href="/wiki/Element_chimic" title="Element chimic">element</a> mai greu, cesiul asigură o bună detectare a acestora. Vaporii de cesiu sunt larg utilizați în <a href="/wiki/Magnetometru" title="Magnetometru">magnetometre</a>.<sup id="cite_ref-68" class="reference"><a href="#cite_note-68"><span class="cite-bracket">&#91;</span>64<span class="cite-bracket">&#93;</span></a></sup> Elementul mai este folosit și ca standard intern în spectrofotometrie.<sup id="cite_ref-69" class="reference"><a href="#cite_note-69"><span class="cite-bracket">&#91;</span>65<span class="cite-bracket">&#93;</span></a></sup> Ca și toate metalele alcaline, cesiul are o oarecare afinitate pentru <a href="/wiki/Oxigen" title="Oxigen">oxigen</a> și este utilizat ca "<a href="/wiki/Getter" title="Getter">getter</a>" (reproducător) în tuburile cu vid.<sup id="cite_ref-70" class="reference"><a href="#cite_note-70"><span class="cite-bracket">&#91;</span>66<span class="cite-bracket">&#93;</span></a></sup> Printre alte utilizări ale metalului mai trebuie menționate aplicațiile în <a href="/wiki/Laser" title="Laser">laserele</a> de mare <a href="/wiki/Energie" title="Energie">energie</a>, în lămpile fluorescente și în <a href="/wiki/Redresor" title="Redresor">redresoarele cu vapori</a>.<sup id="cite_ref-USGS_11-19" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Fluidele_de_centrifugare">Fluidele de centrifugare</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=15" title="Modifică secțiunea: Fluidele de centrifugare" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=15" title="Edit section&#39;s source code: Fluidele de centrifugare"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Datorită <a href="/wiki/Densitate" title="Densitate">densității</a> lor foarte ridicate, soluțiile de <a href="/wiki/Clorur%C4%83_de_cesiu" title="Clorură de cesiu">clorură de cesiu</a> (CsCl), <a href="/wiki/Sulfat_de_cesiu" title="Sulfat de cesiu">sulfat de cesiu</a> (<span class="chemf nowrap">Cs<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>SO<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />4</span></span>) și acid trifluoroacetic (<span class="chemf nowrap">Cs(O<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />2</span>CCF<span style="display:inline-block; margin-bottom:-0.3em; vertical-align:-0.4em; line-height:1.2em; font-size:85%; text-align:left;"><br />3</span>)</span>) sunt larg utilizate în <a href="/wiki/Biologie_molecular%C4%83" title="Biologie moleculară">biologia moleculară</a>.<sup id="cite_ref-71" class="reference"><a href="#cite_note-71"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> Această tehnologie este utilizată, în primul rând, la izolarea <a href="/wiki/Virus" title="Virus">particulelor virale</a>, <a href="/wiki/Organit_celular" title="Organit celular">organitelor sub-celulare</a> și a <a href="/wiki/Acid_nucleic" title="Acid nucleic">acizilor nucleici</a> din mostrele <a href="/wiki/Biologie" title="Biologie">biologice</a>.<sup id="cite_ref-72" class="reference"><a href="#cite_note-72"><span class="cite-bracket">&#91;</span>68<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Utilizări_chimice_și_medicale"><span id="Utiliz.C4.83ri_chimice_.C8.99i_medicale"></span>Utilizări chimice și medicale</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=16" title="Modifică secțiunea: Utilizări chimice și medicale" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=16" title="Edit section&#39;s source code: Utilizări chimice și medicale"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fi%C8%99ier:Caesium_chloride.jpg" class="mw-file-description"><img alt="Some fine white powder on a laboratory watch glass" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/Caesium_chloride.jpg/220px-Caesium_chloride.jpg" decoding="async" width="220" height="206" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/Caesium_chloride.jpg/330px-Caesium_chloride.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/58/Caesium_chloride.jpg/440px-Caesium_chloride.jpg 2x" data-file-width="531" data-file-height="498" /></a><figcaption>O mostră de clorură de cesiu pe o <a href="/wiki/Sticl%C4%83_de_ceas" title="Sticlă de ceas">sticlă de ceas</a></figcaption></figure> <p>Există câteva utilizări chimice ale cesiului.<sup id="cite_ref-73" class="reference"><a href="#cite_note-73"><span class="cite-bracket">&#91;</span>69<span class="cite-bracket">&#93;</span></a></sup> Doparea cu compuși ai cesiului este folosită pentru a spori eficiența electrică a mai multor <a href="/wiki/Metal" title="Metal">metale</a> sau catalizatori folosiți în producția <a href="/wiki/Substan%C8%9B%C4%83" class="mw-redirect" title="Substanță">chimicalelor</a> ca <a href="/wiki/Acid_acrilic" title="Acid acrilic">acidul acrilic</a>, <a href="/wiki/Antrachinon%C4%83" title="Antrachinonă">antrachinona</a>, oxidul de etilenă, <a href="/wiki/Metanol" title="Metanol">metanolul</a>, anhidrida ftalică, <a href="/wiki/Stiren" title="Stiren">stirenul</a>, metacrilatul de metil și alte <a href="/wiki/Alchen%C4%83" title="Alchenă">olefine</a>. Cesiul mai este folosit și în procedeul de obținere a acidului sulfuric, în timpul conversiei catalitice a <a href="/wiki/Dioxid_de_sulf" title="Dioxid de sulf">dioxidului de sulf</a> la <a href="/wiki/Trioxid_de_sulf" title="Trioxid de sulf">trioxid de sulf</a>.<sup id="cite_ref-USGS_11-20" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Totodată, cesiul metalic este folosit și la purificarea <a href="/wiki/Dioxid_de_carbon" title="Dioxid de carbon">dioxidului de carbon</a>.<sup id="cite_ref-USGS_11-21" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Fluorur%C4%83_de_cesiu" title="Fluorură de cesiu">Fluorura de cesiu</a> are utilizări în <a href="/wiki/Chimie_organic%C4%83" title="Chimie organică">chimia organică</a> , fiind o bază,<sup id="cite_ref-greenwood_20-3" class="reference"><a href="#cite_note-greenwood-20"><span class="cite-bracket">&#91;</span>17<span class="cite-bracket">&#93;</span></a></sup> sau ca sursă anhidră de <a href="/wiki/Ioni" class="mw-redirect" title="Ioni">ioni</a> de <a href="/wiki/Fluor" title="Fluor">fluorură</a>.<sup id="cite_ref-74" class="reference"><a href="#cite_note-74"><span class="cite-bracket">&#91;</span>70<span class="cite-bracket">&#93;</span></a></sup> Adesea, sărurile de cesiu înlocuiesc sărurile de <a href="/wiki/Potasiu" title="Potasiu">potasiu</a> sau <a href="/wiki/Sodiu" title="Sodiu">sodiu</a> în <a href="/wiki/Sintez%C4%83" title="Sinteză">sinteza organică</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Aplicațiile_nucleare_și_aplicațiile_izotopilor"><span id="Aplica.C8.9Biile_nucleare_.C8.99i_aplica.C8.9Biile_izotopilor"></span>Aplicațiile nucleare și aplicațiile izotopilor</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=17" title="Modifică secțiunea: Aplicațiile nucleare și aplicațiile izotopilor" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=17" title="Edit section&#39;s source code: Aplicațiile nucleare și aplicațiile izotopilor"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Cesiu-137 este un radioizotop comun al cesiului folosit ca sursă de raze gama în industrie. Acesta este avantajos datorită timpului de înjumătățire de aproximativ 30 de <a href="/wiki/An" title="An">ani</a> și pentru că poate fi fabricat în urma unui ciclu nuclear, având ca produs de dezintegrare izotopul stabil <sup>137</sup><a href="/wiki/Bariu" title="Bariu">Ba</a>. Însă, datorită <a href="/wiki/Solubilitate" title="Solubilitate">solubilității</a> mari în <a href="/wiki/Ap%C4%83" title="Apă">apă</a>, acesta are și dezavantajul de a fi incompatibil cu <a href="/wiki/Iradierea_alimentelor" title="Iradierea alimentelor">iradierea produselor alimentare</a> și a consumabilelor medicale.<sup id="cite_ref-Takeshi_75-0" class="reference"><a href="#cite_note-Takeshi-75"><span class="cite-bracket">&#91;</span>71<span class="cite-bracket">&#93;</span></a></sup> Izotopul a mai fost folosit în <a href="/wiki/Agricultur%C4%83" title="Agricultură">agricultură</a>, tratamentul <a href="/wiki/Cancer" title="Cancer">cancerului</a>, la <a href="/wiki/Steril" title="Steril">sterilizarea</a> mâncării, la nămolurile pentru epurare și în echipamentul chirurgical.<sup id="cite_ref-USGS_11-22" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-76" class="reference"><a href="#cite_note-76"><span class="cite-bracket">&#91;</span>72<span class="cite-bracket">&#93;</span></a></sup> Izotopii radioactivi ai cesiului au mai fost folosiți în <a href="/wiki/Radioterapie" title="Radioterapie">radioterapie</a> pentru a trata diferite tipuri de cancer,<sup id="cite_ref-77" class="reference"><a href="#cite_note-77"><span class="cite-bracket">&#91;</span>73<span class="cite-bracket">&#93;</span></a></sup> dar apariția unor alternative mai bune, precum și utilizarea clorurii de cesiu solubile în apă, ce crea contaminări, a dus treptat la scoaterea lor din uz.<sup id="cite_ref-78" class="reference"><a href="#cite_note-78"><span class="cite-bracket">&#91;</span>74<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-79" class="reference"><a href="#cite_note-79"><span class="cite-bracket">&#91;</span>75<span class="cite-bracket">&#93;</span></a></sup> Cesiu-137 a fost utilizat în diferite tipuri de măsurare industriale, printre care se numără măsurarea <a href="/wiki/Umiditate" title="Umiditate">umidității</a>, <a href="/wiki/Densitate" title="Densitate">densității</a> și a grosimii.<sup id="cite_ref-gauges_80-0" class="reference"><a href="#cite_note-gauges-80"><span class="cite-bracket">&#91;</span>76<span class="cite-bracket">&#93;</span></a></sup> A fost folosit, de asemenea, în aparatele pentru diagrafie pentru măsurarea densității unei <a href="/wiki/Roc%C4%83" title="Rocă">roci</a>.<sup id="cite_ref-81" class="reference"><a href="#cite_note-81"><span class="cite-bracket">&#91;</span>77<span class="cite-bracket">&#93;</span></a></sup> Izotopul cesiu-137 a mai fost folosit în studiile <a href="/wiki/Hidrologie" title="Hidrologie">hidrologice</a>, similare cu cele în care se folosea <a href="/wiki/Tritiu" title="Tritiu">tritiu</a>, fiind un produs de fisiune nucleară. Odată cu începerea testelor nucleare din <a href="/wiki/1945" title="1945">1945</a> (ce au durat până în anii <a href="/wiki/1980" title="1980">1980</a>), mari cantități ale izotopului au fost eliberate în <a href="/wiki/Atmosfer%C4%83" title="Atmosferă">atmosferă</a>, unde au fost absorbite sub formă de <a href="/wiki/Solu%C8%9Bie" class="mw-redirect" title="Soluție">soluție</a>. Cesiu-134 și cesiu-135 au fost utilizați în hidrologie ca măsurători pentru producția de cesiu provenită din industria nucleară. Deși sunt mai puțin răspândiți decât cesiu-133 sau cesiu-137, aceștia au avantajul că pot fi produși numai din surse antropogenice.<sup id="cite_ref-82" class="reference"><a href="#cite_note-82"><span class="cite-bracket">&#91;</span>78<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-83" class="reference"><a href="#cite_note-83"><span class="cite-bracket">&#91;</span>79<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Hazard">Hazard</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=18" title="Modifică secțiunea: Hazard" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=18" title="Edit section&#39;s source code: Hazard"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure typeof="mw:File/Thumb"><a href="/wiki/Fi%C8%99ier:AirDoseChernobylVector.svg" class="mw-file-description"><img alt="Graph of percentage of the radioactive output by each nuclide that form after a nuclear fallout vs logarithm of time after the incident. In curves of various colors, the predominant source of radiation are depicted in order: Te-132/I-132 for the first five or so days; I-131 for the next five; Ba-140/La-140 briefly; Zr-95/Nb-95 from day 10 until about day 200; and finally Cs-137. Other nuclides producing radioactivity, but not peaking as a major component are Ru, peaking at about 50 days, and Cs-134 at around 600 days." src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/AirDoseChernobylVector.svg/330px-AirDoseChernobylVector.svg.png" decoding="async" width="301" height="201" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2c/AirDoseChernobylVector.svg/500px-AirDoseChernobylVector.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2c/AirDoseChernobylVector.svg/960px-AirDoseChernobylVector.svg.png 2x" data-file-width="960" data-file-height="640" /></a><figcaption>Proporția doze totale de radiații (în <a href="/wiki/Aer" title="Aer">aer</a>) după <a href="/wiki/Accidentul_nuclear_de_la_Cernob%C3%AEl" title="Accidentul nuclear de la Cernobîl">accidentul nuclear de la Cernobîl</a>, descriind izotopul cesiu-137 ca fiind cea mai mare sursă de radiații la 200 după accident.<sup id="cite_ref-84" class="reference"><a href="#cite_note-84"><span class="cite-bracket">&#91;</span>80<span class="cite-bracket">&#93;</span></a></sup></figcaption></figure> <p>Deși riscul intrării în contact cu compuși ai cesiului în cursul vieții este redus pentru majoritatea <a href="/wiki/Om" title="Om">oamenilor</a>, aceștia sunt relativ toxici datorită asemănării cesiului cu <a href="/wiki/Potasiu" title="Potasiu">potasiul</a>. Contactul de largă durată cu compușii cesiului poate cauza iritabilitate și spasme, dar astfel de substanțe nu vor fi găsite în natură, iar cesiul nu este un poluant chimic major.<sup id="cite_ref-85" class="reference"><a href="#cite_note-85"><span class="cite-bracket">&#91;</span>81<span class="cite-bracket">&#93;</span></a></sup> Valoarea dozei letale medii a <a href="/wiki/Clorur%C4%83_de_cesiu" title="Clorură de cesiu">clorurii de cesiu</a> pentru șoareci este 2,3&#160;g per kilogram, ce este simțitor mai mică decât cea pentru <a href="/wiki/Clorur%C4%83_de_potasiu" title="Clorură de potasiu">clorura de potasiu</a> sau <a href="/wiki/Sare_de_buc%C4%83t%C4%83rie" title="Sare de bucătărie">clorura de sodiu</a>.<sup id="cite_ref-86" class="reference"><a href="#cite_note-86"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> </p> <div style="float: left;"> <table class="wikitable"> <tbody><tr> <th style="background:#f90;">NFPA 704 </th></tr> <tr> <td style="text-align:left;"> <div style="position: relative; height: 85px; width: 75px;"> <div style="position: absolute; height: 75px; width: 75px;"> <p><span typeof="mw:File"><a href="/wiki/Fi%C8%99ier:NFPA_704.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/NFPA_704.svg/75px-NFPA_704.svg.png" decoding="async" width="75" height="75" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/NFPA_704.svg/113px-NFPA_704.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6f/NFPA_704.svg/150px-NFPA_704.svg.png 2x" data-file-width="512" data-file-height="512" /></a></span> </p> </div> <div title="Inflamabilitate" style="background: transparent; width: 75px; height: 2em; text-align: center; vertical-align: middle; position: absolute; top: 15px; font-size: large;">3</div> <div title="Sănătate" style="background: transparent; width: 37.5px; height: 2em; text-align: center; vertical-align: middle; position: absolute; top: 33px; color: white; font-size: large;">3</div> <div title="Reactivitate" style="background: transparent; width: 37.5px; height: 2em; text-align: center; vertical-align: middle; position: absolute; top: 33px; left: 37.5px; font-size: large;">2</div> <div title="Alte hazarduri" style="background: transparent; width: 75px; height: 2em; text-align: center; vertical-align: middle; position: absolute; top: 52px; font-size: small;"><s>W</s></div> </div> </td></tr> <tr> <td style="width:80pt;">Codul <a href="/wiki/NFPA_704" title="NFPA 704">NFPA 704</a> pentru cesiul metalic </td></tr></tbody></table></div> <p>Cesiul este unul dintre cele mai reactive elemente și este foarte exploziv când reacționează cu <a href="/wiki/Ap%C4%83_(molecul%C4%83)" title="Apă (moleculă)">apa</a>. <a href="/wiki/Hidrogen" title="Hidrogen">Hidrogenul</a> <a href="/wiki/Gaz" title="Gaz">gazos</a> produs în urma reacției este încălzit de către <a href="/wiki/Energie_termic%C4%83" title="Energie termică">energia termică</a> ce provine din aceasta și poate cauza aprindere și explozie violentă. Această manifestare apare și la celelalte <a href="/wiki/Metale_alcaline" class="mw-redirect" title="Metale alcaline">metale alcaline</a>, dar cesiul este atât de reactiv, încât această reacție are loc chiar și cu apă foarte rece.<sup id="cite_ref-USGS_11-23" class="reference"><a href="#cite_note-USGS-11"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Metalul este foarte piroforic, și se aprinde spontan în aer producând <a href="/wiki/Hidroxid_de_cesiu" title="Hidroxid de cesiu">hidroxid de cesiu</a> și alți oxizi. Hidroxidul său este o <a href="/wiki/Baz%C4%83_(chimie)" title="Bază (chimie)">bază</a> foarte puternică, ce poate coroda chiar și <a href="/wiki/Sticl%C4%83" title="Sticlă">sticla</a>.<sup id="cite_ref-RSC_16-1" class="reference"><a href="#cite_note-RSC-16"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> Izotopii cesiu-134 și cesiu-137 (prezenți și în cantități mici în <a href="/wiki/Biosfer%C4%83" title="Biosferă">biosferă</a>, în locurile unde au avut loc scurgeri radioactive) reprezintă o adevărată povară radioactivă. Cesiul radioactiv nu se acumulează în corp la fel de eficient ca alți produși de fisiune (ca de exemplu <a href="/wiki/Iod" title="Iod">iodul</a> sau <a href="/wiki/Stron%C8%9Biu" title="Stronțiu">stronțiul</a> radioactiv). Ca și în cazul altor metale alcaline, cesiul radioactiv iese din corp relativ repede, prin transpirație și <a href="/wiki/Urin%C4%83" title="Urină">urină</a>. Totuși, cesiul radioactiv este similar <a href="/wiki/Potasiu" title="Potasiu">potasiului</a> și tinde să se acumuleze în <a href="/wiki/%C8%9Aesut_vegetal" title="Țesut vegetal">țesuturile plantelor</a>, adică în <a href="/wiki/Fruct" title="Fruct">fructe</a> și <a href="/wiki/Legum%C4%83" title="Legumă">legume</a>.<sup id="cite_ref-87" class="reference"><a href="#cite_note-87"><span class="cite-bracket">&#91;</span>83<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-88" class="reference"><a href="#cite_note-88"><span class="cite-bracket">&#91;</span>84<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-89" class="reference"><a href="#cite_note-89"><span class="cite-bracket">&#91;</span>85<span class="cite-bracket">&#93;</span></a></sup> Se mai cunoaște că <a href="/wiki/Ciuperc%C4%83" class="mw-redirect" title="Ciupercă">ciupercile</a> ce provin din pădurile contaminate acumulează cesiu radioactiv (cesiu-137) în pălaria lor.<sup id="cite_ref-90" class="reference"><a href="#cite_note-90"><span class="cite-bracket">&#91;</span>86<span class="cite-bracket">&#93;</span></a></sup> Acumularea izotopului cesiu-137 în <a href="/wiki/Lac" title="Lac">lacuri</a> a reprezentat prima mare îngrijorare de după <a href="/wiki/Accidentul_nuclear_de_la_Cernob%C3%AEl" title="Accidentul nuclear de la Cernobîl">dezastrul de la Cernobîl</a>.<sup id="cite_ref-smithber05_91-0" class="reference"><a href="#cite_note-smithber05-91"><span class="cite-bracket">&#91;</span>87<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-92" class="reference"><a href="#cite_note-92"><span class="cite-bracket">&#91;</span>88<span class="cite-bracket">&#93;</span></a></sup> Experimentele făcute pe câini au arătat că o singură doză de 3,8 <a href="/wiki/Curie_(unitate)" class="mw-redirect" title="Curie (unitate)">mCi</a> (140&#160;<a href="/wiki/Becquerel" title="Becquerel">MBq</a>, 4,1&#160;μg de cesiu-137) per kilogram este letală în trei săptămâni;<sup id="cite_ref-93" class="reference"><a href="#cite_note-93"><span class="cite-bracket">&#91;</span>89<span class="cite-bracket">&#93;</span></a></sup> cantități mai mici pot cauza infertilitate și <a href="/wiki/Cancer" title="Cancer">cancer</a>.<sup id="cite_ref-94" class="reference"><a href="#cite_note-94"><span class="cite-bracket">&#91;</span>90<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Agen%C8%9Bia_Interna%C8%9Bional%C4%83_pentru_Energie_Atomic%C4%83" title="Agenția Internațională pentru Energie Atomică">Agenția Internațională pentru Energie Atomică</a> a atenționat că materiale radioactive, printre care și cesiu-137, pot fi folosite în dispozitivele de dispersie radiologică, sau în „bombe murdare”.<sup id="cite_ref-95" class="reference"><a href="#cite_note-95"><span class="cite-bracket">&#91;</span>91<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Vezi_și"><span id="Vezi_.C8.99i"></span>Vezi și</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=19" title="Modifică secțiunea: Vezi și" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=19" title="Edit section&#39;s source code: Vezi și"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/w/index.php?title=Accidentul_din_Goi%C3%A2nia&amp;action=edit&amp;redlink=1" class="new" title="Accidentul din Goiânia — pagină inexistentă">Accidentul din Goiânia</a>, o <a href="/wiki/Contaminare_radioactiv%C4%83" title="Contaminare radioactivă">contaminare</a> majoră radioactivă, implicând și o bară de clorură de cesiu</li> <li><a href="/w/index.php?title=Accidentul_din_Acerinox&amp;action=edit&amp;redlink=1" class="new" title="Accidentul din Acerinox — pagină inexistentă">Accidentul din Acerinox</a>, o contaminare cu cesiu-137</li> <li><a href="/wiki/Fluor" title="Fluor">Fluor</a>, cel mai electronegativ element, este elementul opus cesiului</li></ul> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=20" title="Modifică secțiunea: Note" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=20" title="Edit section&#39;s source code: Note"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="references-small" style="list-style-type: decimal;"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-2"><b><a href="#cite_ref-2">^</a></b> <span class="reference-text">Împreună cu <a href="/wiki/Rubidiu" title="Rubidiu">rubidiu</a> (39&#160;°C [102&#160;°F]), <a href="/wiki/Franciu" title="Franciu">franciu</a> (estimat la 27&#160;°C [81&#160;°F]), <a href="/wiki/Mercur_(element)" title="Mercur (element)">mercur</a> (−39&#160;°C [−38&#160;°F]), și <a href="/wiki/Galiu" title="Galiu">galiu</a> (30&#160;°C [86&#160;°F]); <a href="/wiki/Brom" title="Brom">bromul</a> este, de asemenea, lichid la temperatura camerei și are un punct de topire de −7.2&#160;°C, 19&#160;°F), dar este un <a href="/wiki/Halogen" title="Halogen">halogen</a>, nu un <a href="/wiki/Metal" title="Metal">metal</a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup></span> </li> <li id="cite_note-3"><b><a href="#cite_ref-3">^</a></b> <span class="reference-text">Bunsen l-a citat pe <a href="/wiki/Aulus_Gellius" title="Aulus Gellius">Aulus Gellius</a>: <i>Nostris autem veteribus caesia dicts est quae Graecis, ut Nigidus ait, de colore coeli quasi coelia.</i></span> </li> <li id="cite_note-15"><b><a href="#cite_ref-15">^</a></b> <span class="reference-text">Elementul radioactiv numit <a href="/wiki/Franciu" title="Franciu">franciu</a> poate avea un punct de topire mai mic, dar radioactivitatea sa nu permite efectuarea testelor necesare determinării acestuia.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup></span> </li> <li id="cite_note-23"><b><a href="#cite_ref-23">^</a></b> <span class="reference-text"><a href="/wiki/Franciu" title="Franciu">Franciu</a> poate fi mult mai electropozitic, dar acesta nu a fost studiat exeprimental datorită radioacitvității sale ridicate.<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">&#91;</span>19<span class="cite-bracket">&#93;</span></a></sup></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Referințe"><span id="Referin.C8.9Be"></span>Referințe</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=21" title="Modifică secțiunea: Referințe" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=21" title="Edit section&#39;s source code: Referințe"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="references-small columns references-column-count references-column-count-2" style="-moz-column-count: 2; -webkit-column-count: 2; column-count: 2; list-style-type: decimal;"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><b><a href="#cite_ref-1">^</a></b> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="http://www.webelements.com/">„WebElements Periodic Table of the Elements”</a>. University of Sheffield<span class="reference-accessdate">. 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Accesat în <span class="nowrap">20 martie</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=Mineral+Commodity+Profile%3A+Cesium&amp;rft.pub=United+States+Geological+Survey&amp;rft.date=2004&amp;rft.aulast=Butterman&amp;rft.aufirst=William+C.&amp;rft.au=Brooks%2C+William+E.&amp;rft.au=Reese%2C+Jr.%2C+Robert+G.&amp;rft_id=http%3A%2F%2Fpubs.usgs.gov%2Fof%2F2004%2F1432%2F2004-1432.pdf&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span> <span style="font-size:100%" class="error citation-comment">Verificați datele pentru: <code style="color:inherit; border:inherit; padding:inherit;">&#124;access-date=</code> (<a href="/wiki/Ajutor:Erori_CS1#bad_date" title="Ajutor:Erori CS1">ajutor</a>)</span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-USNO-12"><b><a href="#cite_ref-USNO_12-0">^</a></b> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20150223231150/http://tycho.usno.navy.mil/cesium.html">„Cesium Atoms at Work”</a>. 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(<time datetime="1974">1974</time>). <a rel="nofollow" class="external text" href="http://books.google.com/?id=QdU-lRMjOsgC&amp;pg=PA13&amp;lpg=PA13&amp;dq=cesium+compounds+burn+blue#v=onepage&amp;q&amp;f=false"><i>CRC Handbook of Materials Science</i></a>. CRC Press. p.&#160;13. <a href="/wiki/International_Standard_Book_Number" title="International Standard Book Number">ISBN</a>&#160;<a href="/wiki/Special:Referin%C8%9Be_%C3%AEn_c%C4%83r%C8%9Bi/978-0-8493-2321-8" title="Special:Referințe în cărți/978-0-8493-2321-8">978-0-8493-2321-8</a><span class="reference-accessdate">. Accesat în <time datetime="2012-03-20">20 martie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=CRC+Handbook+of+Materials+Science&amp;rft.pages=13&amp;rft.pub=CRC+Press&amp;rft.date=1974&amp;rft.isbn=978-0-8493-2321-8&amp;rft.aulast=Lynch&amp;rft.aufirst=Charles+T.&amp;rft_id=http%3A%2F%2Fbooks.google.com%2F%3Fid%3DQdU-lRMjOsgC%26pg%3DPA13%26lpg%3DPA13%26dq%3Dcesium%2Bcompounds%2Bburn%2Bblue%23v%3Donepage%26q%26f%3Dfalse&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span> <span style="font-size:100%" class="error citation-comment">Parametru necunoscut <code style="color:inherit; border:inherit; padding:inherit;">&#124;unused_data=</code> ignorat (<a href="/wiki/Ajutor:Erori_CS1#parameter_ignored" title="Ajutor:Erori CS1">ajutor</a>)</span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-18"><b><a href="#cite_ref-18">^</a></b> <span class="reference-text"><cite class="citation web">Taova, T. M.; et al. (<time datetime="2003-06-22">22 iunie 2003</time>). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20061009133313/http://symp15.nist.gov/pdf/p564.pdf">„Densitatea topiturilor metalelor alcaline și sistemele ternare Na-K-Cs și Na-K-Rb”</a> <span style="font-size:85%;">(PDF)</span>. <i>Fifteenth symposium on thermophysical properties, Boulder, Colorado, USA</i>. Arhivat din <a rel="nofollow" class="external text" href="http://symp15.nist.gov/pdf/p564.pdf">original</a> <span style="font-size:85%;">(PDF)</span> la <time datetime="2006-10-09">9 octombrie 2006</time><span class="reference-accessdate">. Accesat în <time datetime="2012-03-20">20 martie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=Fifteenth+symposium+on+thermophysical+properties%2C+Boulder%2C+Colorado%2C+USA&amp;rft.atitle=Densitatea+topiturilor+metalelor+alcaline+%C8%99i+sistemele+ternare+Na-K-Cs+%C8%99i+Na-K-Rb&amp;rft.date=2003-06-22&amp;rft.au=Taova%2C+T.+M.&amp;rft_id=http%3A%2F%2Fsymp15.nist.gov%2Fpdf%2Fp564.pdf&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><span class="citation-comment" style="display:none; color:#33aa33; margin-left:0.3em">Mentenanță CS1: Utilizare explicită a lui et al. (<a href="/wiki/Categorie:Mentenan%C8%9B%C4%83_CS1:_Utilizare_explicit%C4%83_a_lui_et_al." title="Categorie:Mentenanță CS1: Utilizare explicită a lui et al.">link</a>) </span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-19"><b><a href="#cite_ref-19">^</a></b> <span class="reference-text"><cite class="citation journal">Deiseroth, H. J. (<time datetime="1997">1997</time>). „Amalgamurile metalelor alcaline”. <i>Progress in Solid State Chemistry</i>. <b>25</b> (1–2): 73–123. <a href="/wiki/Digital_object_identifier" title="Digital object identifier">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2FS0079-6786%2897%2981004-7">10.1016/S0079-6786(97)81004-7</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Progress+in+Solid+State+Chemistry&amp;rft.atitle=Amalgamurile+metalelor+alcaline&amp;rft.volume=25&amp;rft.issue=1%E2%80%932&amp;rft.pages=73-123&amp;rft.date=1997&amp;rft_id=info%3Adoi%2F10.1016%2FS0079-6786%2897%2981004-7&amp;rft.aulast=Deiseroth&amp;rft.aufirst=H.+J.&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-greenwood-20">^ <a href="#cite_ref-greenwood_20-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-greenwood_20-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-greenwood_20-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-greenwood_20-3"><sup><i><b>d</b></i></sup></a> <span class="reference-text"><cite class="citation book">Greenwood, N.N.; Earnshaw, A. 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Oxford, UK: Pergamon Press. <a href="/wiki/International_Standard_Book_Number" title="International Standard Book Number">ISBN</a>&#160;<a href="/wiki/Special:Referin%C8%9Be_%C3%AEn_c%C4%83r%C8%9Bi/0-08-022057-6" title="Special:Referințe în cărți/0-08-022057-6">0-08-022057-6</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Chemistry+of+the+Elements&amp;rft.place=Oxford%2C+UK&amp;rft.pub=Pergamon+Press&amp;rft.date=1984&amp;rft.isbn=0-08-022057-6&amp;rft.aulast=Greenwood&amp;rft.aufirst=N.N.&amp;rft.au=Earnshaw%2C+A.&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-HollemanAF-21">^ <a href="#cite_ref-HollemanAF_21-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-HollemanAF_21-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-HollemanAF_21-2"><sup><i><b>c</b></i></sup></a> <span class="reference-text"><cite class="citation book">Holleman, Arnold F.; Wiberg, Egon; Wiberg, Nils (<time datetime="1985">1985</time>). „Vergleichende Übersicht über die Gruppe der Alkalimetalle”. <i><span></span></i>Lehrbuch der Anorganischen Chemie<i><span></span></i> (în German) (ed. 91–100). Walter de Gruyter. pp.&#160;953–955. <a href="/wiki/International_Standard_Book_Number" title="International Standard Book Number">ISBN</a>&#160;<a href="/wiki/Special:Referin%C8%9Be_%C3%AEn_c%C4%83r%C8%9Bi/3-11-007511-3" title="Special:Referințe în cărți/3-11-007511-3">3-11-007511-3</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Vergleichende+%C3%9Cbersicht+%C3%BCber+die+Gruppe+der+Alkalimetalle&amp;rft.btitle=Lehrbuch+der+Anorganischen+Chemie&amp;rft.pages=953-955&amp;rft.edition=91%E2%80%93100&amp;rft.pub=Walter+de+Gruyter&amp;rft.date=1985&amp;rft.isbn=3-11-007511-3&amp;rft.aulast=Holleman&amp;rft.aufirst=Arnold+F.&amp;rft.au=Wiberg%2C+Egon&amp;rft.au=Wiberg%2C+Nils&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><span class="citation-comment" style="display:none; color:#33aa33; margin-left:0.3em">Mentenanță CS1: Limbă nerecunoscută (<a href="/wiki/Categorie:Mentenan%C8%9B%C4%83_CS1:_Limb%C4%83_nerecunoscut%C4%83" title="Categorie:Mentenanță CS1: Limbă nerecunoscută">link</a>) </span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-22"><b><a href="#cite_ref-22">^</a></b> <span class="reference-text"><cite class="citation journal">Andreev, S. 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(<time datetime="1987">1987</time>). „Laser resonance photoionization spectroscopy of Rydberg levels in Fr”. <i><a href="/wiki/Physical_Review_Letters" title="Physical Review Letters">Physical Review Letters</a></i>. <b>59</b> (12): 1274–76. <a href="/wiki/Bibcode" title="Bibcode">Bibcode</a>:<a rel="nofollow" class="external text" href="http://adsabs.harvard.edu/abs/1987PhRvL..59.1274A">1987PhRvL..59.1274A</a>. <a href="/wiki/Digital_object_identifier" title="Digital object identifier">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1103%2FPhysRevLett.59.1274">10.1103/PhysRevLett.59.1274</a>. <a href="/wiki/PubMed_Identifier" title="PubMed Identifier">PMID</a>&#160;<a rel="nofollow" class="external text" href="//www.ncbi.nlm.nih.gov/pubmed/10035190">10035190</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Physical+Review+Letters&amp;rft.atitle=Laser+resonance+photoionization+spectroscopy+of+Rydberg+levels+in+Fr&amp;rft.volume=59&amp;rft.issue=12&amp;rft.pages=1274-76&amp;rft.date=1987&amp;rft_id=info%3Apmid%2F10035190&amp;rft_id=info%3Adoi%2F10.1103%2FPhysRevLett.59.1274&amp;rft_id=info%3Abibcode%2F1987PhRvL..59.1274A&amp;rft.aulast=Andreev&amp;rft.aufirst=S.+V.&amp;rft.au=Letokhov%2C+V.+S.&amp;rft.au=Mishin%2C+V.+I.&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-24"><b><a href="#cite_ref-24">^</a></b> <span class="reference-text"><cite class="citation journal">Dye, J. 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Wiley-VCH. p.&#160;90. <a href="/wiki/International_Standard_Book_Number" title="International Standard Book Number">ISBN</a>&#160;<a href="/wiki/Special:Referin%C8%9Be_%C3%AEn_c%C4%83r%C8%9Bi/3-527-29561-5" title="Special:Referințe în cărți/3-527-29561-5">3-527-29561-5</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Etching+in+microsystem+technology&amp;rft.pages=90&amp;rft.pub=Wiley-VCH&amp;rft.date=1999&amp;rft.isbn=3-527-29561-5&amp;rft.au=K%C3%B6hler%2C+Michael+J.&amp;rft_id=http%3A%2F%2Fbooks.google.com%2F%3Fid%3DF-8SltAKSF8C%26pg%3DPA90%26lpg%3DPA90%26dq%3Dcaesium%2Bhydroxide%2Betch%2Bquartz%26q%3Dcesium&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /><sup>[<i><a href="/wiki/Wikipedia:Leg%C4%83turi_externe" title="Wikipedia:Legături externe">nefuncțională</a></i>]</sup></span> </li> <li id="cite_note-27"><b><a href="#cite_ref-27">^</a></b> <span class="reference-text"><cite class="citation journal">Moyer, Bruce A.; Birdwell, Joseph F.; Bonnesen, Peter V.; Delmau, Laetitia H. 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Accesat în <span class="nowrap">25 martie</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Lithium%2C+cesium%2C+and+rubidium%E2%80%94The+rare+alkali+metals&amp;rft.btitle=United+States+mineral+resources&amp;rft.pages=365-378&amp;rft.pub=U.S.+Geological+Survey+Professional&amp;rft.date=1973&amp;rft.aulast=Norton&amp;rft.aufirst=J.+J.&amp;rft_id=http%3A%2F%2Fpubs.er.usgs.gov%2Fusgspubs%2Fpp%2Fpp820&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span> <span style="font-size:100%" class="error citation-comment">Verificați datele pentru: <code style="color:inherit; border:inherit; padding:inherit;">&#124;access-date=</code> (<a href="/wiki/Ajutor:Erori_CS1#bad_date" title="Ajutor:Erori CS1">ajutor</a>)</span><span class="citation-comment" style="display:none; color:#33aa33; margin-left:0.3em">Mentenanță CS1: Nume multiple: lista editorilor (<a href="/wiki/Categorie:Mentenan%C8%9B%C4%83_CS1:_Nume_multiple:_lista_editorilor" title="Categorie:Mentenanță CS1: Nume multiple: lista editorilor">link</a>) </span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-Burt-59">^ <a href="#cite_ref-Burt_59-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Burt_59-1"><sup><i><b>b</b></i></sup></a> <span class="reference-text"><cite class="citation book">Burt, R. O. (<time datetime="1993">1993</time>). „Caesium and cesium compounds”. <i>Kirk-Othmer encyclopedia of chemical technology</i>. <b>5</b> (ed. 4th). New York: John Wiley &amp; Sons, Inc. pp.&#160;749–764. <a href="/wiki/International_Standard_Book_Number" title="International Standard Book Number">ISBN</a>&#160;<a href="/wiki/Special:Referin%C8%9Be_%C3%AEn_c%C4%83r%C8%9Bi/978-0-471-48494-3" title="Special:Referințe în cărți/978-0-471-48494-3">978-0-471-48494-3</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Caesium+and+cesium+compounds&amp;rft.btitle=Kirk-Othmer+encyclopedia+of+chemical+technology&amp;rft.place=New+York&amp;rft.pages=749-764&amp;rft.edition=4th&amp;rft.pub=John+Wiley+%26+Sons%2C+Inc.&amp;rft.date=1993&amp;rft.isbn=978-0-471-48494-3&amp;rft.aulast=Burt&amp;rft.aufirst=R.+O.&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-60"><b><a href="#cite_ref-60">^</a></b> <span class="reference-text"><cite class="citation journal">Benton, William; Turner, Jim (<time datetime="2000">2000</time>). <a rel="nofollow" class="external text" href="http://www.iadc.org/dcpi/dc-mayjun00/m-cabot.pdf">„Cesium formate fluid succeeds in North Sea HPHT field trials”</a> <span style="font-size:85%;">(PDF)</span>. <i>Drilling Contractor</i> (May/June): 38–41<span class="reference-accessdate">. Accesat în <time datetime="2012-03-25">25 martie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Drilling+Contractor&amp;rft.atitle=Cesium+formate+fluid+succeeds+in+North+Sea+HPHT+field+trials&amp;rft.issue=May%2FJune&amp;rft.pages=38-41&amp;rft.date=2000&amp;rft.aulast=Benton&amp;rft.aufirst=William&amp;rft.au=Turner%2C+Jim&amp;rft_id=http%3A%2F%2Fwww.iadc.org%2Fdcpi%2Fdc-mayjun00%2Fm-cabot.pdf&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-CEC-61">^ <a href="#cite_ref-CEC_61-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-CEC_61-1"><sup><i><b>b</b></i></sup></a> <span class="reference-text"><cite class="citation book">transl. and rev. by Eagleson, Mary (<time datetime="1994">1994</time>). <a rel="nofollow" class="external text" href="http://books.google.com/?id=Owuv-c9L_IMC&amp;pg=PA198"><i>Concise encyclopedia chemistry</i></a>. Berlin: de Gruyter. p.&#160;198. <a href="/wiki/International_Standard_Book_Number" title="International Standard Book Number">ISBN</a>&#160;<a href="/wiki/Special:Referin%C8%9Be_%C3%AEn_c%C4%83r%C8%9Bi/978-3-11-011451-5" title="Special:Referințe în cărți/978-3-11-011451-5">978-3-11-011451-5</a><span class="reference-accessdate">. Accesat în <time datetime="2012-03-25">25 martie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Concise+encyclopedia+chemistry&amp;rft.place=Berlin&amp;rft.pages=198&amp;rft.pub=de+Gruyter&amp;rft.date=1994&amp;rft.isbn=978-3-11-011451-5&amp;rft.au=transl.+and+rev.+by+Eagleson%2C+Mary&amp;rft_id=http%3A%2F%2Fbooks.google.com%2F%3Fid%3DOwuv-c9L_IMC%26pg%3DPA198&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-Down-62">^ <a href="#cite_ref-Down_62-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Down_62-1"><sup><i><b>b</b></i></sup></a> <span class="reference-text"><cite class="citation conference">Downs, J. D.; Blaszczynski, M.; Turner, J.; Harris, M. 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Accesat în <time datetime="2012-03-26">26 martie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=conference&amp;rft.btitle=Drilling+and+Completing+Difficult+HP%2FHT+Wells+With+the+Aid+of+Cesium+Formate+Brines-A+Performance+Review&amp;rft.place=Miami%2C+Florida%2C+USASociety+of+Petroleum+Engineers&amp;rft.date=2006&amp;rft_id=info%3Adoi%2F10.2118%2F99068-MS&amp;rft.aulast=Downs&amp;rft.aufirst=J.+D.&amp;rft.au=Blaszczynski%2C+M.&amp;rft.au=Turner%2C+J.&amp;rft.au=Harris%2C+M.&amp;rft_id=http%3A%2F%2Fwww.spe.org%2Felibinfo%2FeLibrary_Papers%2Fspe%2F2006%2F06DC%2FSPE-99068-MS%2FSPE-99068-MS.htm&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-63"><b><a href="#cite_ref-63">^</a></b> <span class="reference-text"><cite class="citation journal">Flatern, Rick (<time datetime="2001">2001</time>). „Keeping cool in the HPHT environment”. <i>Offshore Engineer</i> (February): 33–37.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Offshore+Engineer&amp;rft.atitle=Keeping+cool+in+the+HPHT+environment&amp;rft.issue=February&amp;rft.pages=33-37&amp;rft.date=2001&amp;rft.aulast=Flatern&amp;rft.aufirst=Rick&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-64"><b><a href="#cite_ref-64">^</a></b> <span class="reference-text"><cite class="citation journal">Rasor, Ned S.; Warner, Charles (septembrie 1964). „Correlation of Emission Processes for Adsorbed Alkali Films on Metal Surfaces”. <i>Journal of Applied Physics</i>. <b>35</b> (9): 2589–2600. <a href="/wiki/Bibcode" title="Bibcode">Bibcode</a>:<a rel="nofollow" class="external text" href="http://adsabs.harvard.edu/abs/1964JAP....35.2589R">1964JAP....35.2589R</a>. <a href="/wiki/Digital_object_identifier" title="Digital object identifier">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1063%2F1.1713806">10.1063/1.1713806</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Journal+of+Applied+Physics&amp;rft.atitle=Correlation+of+Emission+Processes+for+Adsorbed+Alkali+Films+on+Metal+Surfaces&amp;rft.volume=35&amp;rft.issue=9&amp;rft.pages=2589-2600&amp;rft.date=1964-09&amp;rft_id=info%3Adoi%2F10.1063%2F1.1713806&amp;rft_id=info%3Abibcode%2F1964JAP....35.2589R&amp;rft.aulast=Rasor&amp;rft.aufirst=Ned+S.&amp;rft.au=Warner%2C+Charles&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-65"><b><a href="#cite_ref-65">^</a></b> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="http://www.americanelements.com/cs.html">„Cesium Supplier &amp; Technical Information”</a>. 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Accesat în <time datetime="2012-03-29">29 martie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Internal+Standards&amp;rft.btitle=Instrumenta%C8%9Bie+de+laborator&amp;rft.place=New+York&amp;rft.pages=108&amp;rft.pub=John+Wiley+and+Sons&amp;rft.date=1994&amp;rft.isbn=978-0-471-28572-4&amp;rft.aulast=Haven&amp;rft.aufirst=Mary+C.&amp;rft.au=Tetrault%2C+Gregory+A.&amp;rft.au=Schenken%2C+Jerald+R.&amp;rft_id=http%3A%2F%2Fbooks.google.com%2F%3Fid%3Dz9SzvsSCHv4C%26pg%3DPA108&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-70"><b><a href="#cite_ref-70">^</a></b> <span class="reference-text"><cite class="citation book">McGee, James D. 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Accesat în <time datetime="2012-03-29">29 martie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Photo-electronic+image+devices%3A+proceedings+of+the+fourth+symposium+held+at+Imperial+College%2C+London%2C+September+16%E2%80%9320%2C+1968&amp;rft.pages=391&amp;rft.pub=Academic+Press&amp;rft.date=1969&amp;rft.isbn=978-0-12-014528-7&amp;rft.aulast=McGee&amp;rft.aufirst=James+D.&amp;rft_id=http%3A%2F%2Fbooks.google.com%2F%3Fid%3D1o1WECNJkscC%26pg%3DPA391%26lpg%3D391&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-71"><b><a href="#cite_ref-71">^</a></b> <span class="reference-text">Manfred Bick, Horst Prinz, "Cesium and Cesium Compounds" din "Ullmann's Encyclopedia of Industrial Chemistry 2005", Wiley-VCH, Weinheim. <a href="/wiki/Digital_object_identifier" title="Digital object identifier">doi</a>:<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1002/14356007.a06">153 10.1002/14356007.a06 153</a>.</span> </li> <li id="cite_note-72"><b><a href="#cite_ref-72">^</a></b> <span class="reference-text"><cite class="citation book">Desai, Mohamed A., ed. (<time datetime="2000">2000</time>). „Gradient Materials”. <a rel="nofollow" class="external text" href="http://books.google.com/?id=1kn89nI2gUsC&amp;pg=PA61"><i>Downstream processing methods</i></a>. Totowa, N.J.: Humana Press. pp.&#160;61–62. <a href="/wiki/International_Standard_Book_Number" title="International Standard Book Number">ISBN</a>&#160;<a href="/wiki/Special:Referin%C8%9Be_%C3%AEn_c%C4%83r%C8%9Bi/978-0-89603-564-5" title="Special:Referințe în cărți/978-0-89603-564-5">978-0-89603-564-5</a><span class="reference-accessdate">. Accesat în <time datetime="2012-03-29">29 martie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Gradient+Materials&amp;rft.btitle=Downstream+processing+methods&amp;rft.place=Totowa%2C+N.J.&amp;rft.pages=61-62&amp;rft.pub=Humana+Press&amp;rft.date=2000&amp;rft.isbn=978-0-89603-564-5&amp;rft_id=http%3A%2F%2Fbooks.google.com%2F%3Fid%3D1kn89nI2gUsC%26pg%3DPA61&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-73"><b><a href="#cite_ref-73">^</a></b> <span class="reference-text"><cite class="citation book">Burt, R. O. (<time datetime="1993">1993</time>). „Cesium and cesium compounds”. <i>Kirk-Othmer encyclopedia of chemical technology</i>. <b>5</b> (ed. 4th). New York: John Wiley &amp; Sons. p.&#160;759. <a href="/wiki/International_Standard_Book_Number" title="International Standard Book Number">ISBN</a>&#160;<a href="/wiki/Special:Referin%C8%9Be_%C3%AEn_c%C4%83r%C8%9Bi/978-0-471-15158-6" title="Special:Referințe în cărți/978-0-471-15158-6">978-0-471-15158-6</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Cesium+and+cesium+compounds&amp;rft.btitle=Kirk-Othmer+encyclopedia+of+chemical+technology&amp;rft.place=New+York&amp;rft.pages=759&amp;rft.edition=4th&amp;rft.pub=John+Wiley+%26+Sons&amp;rft.date=1993&amp;rft.isbn=978-0-471-15158-6&amp;rft.aulast=Burt&amp;rft.aufirst=R.+O.&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-74"><b><a href="#cite_ref-74">^</a></b> <span class="reference-text">Gregory K. Friestad, Bruce P. Branchaud, Walter Navarrini, Maurizio Sansotera "Cesium Fluoride" in Encyclopedia of Reagents for Organic Synthesis 2007, John Wiley &amp; Sons. <a href="/wiki/Digital_object_identifier" title="Digital object identifier">doi</a>:<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1002/047084289X.rc050.pub2">10.1002/047084289X.rc050.pub2</a></span> </li> <li id="cite_note-Takeshi-75"><b><a href="#cite_ref-Takeshi_75-0">^</a></b> <span class="reference-text"><cite class="citation web">Okumura, Takeshi (<time datetime="2003-10-21">21 octombrie 2003</time>). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20110720163223/http://earth1.epa.gov/radiation/docs/source-management/csfinallongtakeshi.pdf">„The material flow of radioactive cesium-137 in the U.S. 2000”</a> <span style="font-size:85%;">(PDF)</span>. United States Environmental Protection Agency. 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Accesat în <time datetime="2012-04-01">1 aprilie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=The+material+flow+of+radioactive+cesium-137+in+the+U.S.+2000&amp;rft.pub=United+States+Environmental+Protection+Agency&amp;rft.date=2003-10-21&amp;rft.aulast=Okumura&amp;rft.aufirst=Takeshi&amp;rft_id=http%3A%2F%2Fearth1.epa.gov%2Fradiation%2Fdocs%2Fsource-management%2Fcsfinallongtakeshi.pdf&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-76"><b><a href="#cite_ref-76">^</a></b> <span class="reference-text"><cite class="citation book">Jensen, N. L. (<time datetime="1985">1985</time>). <i>Cesium, in Mineral facts and problems</i>. Bulletin 675. U.S. Bureau of Mines. pp.&#160;133–138.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Cesium%2C+in+Mineral+facts+and+problems&amp;rft.pages=133-138&amp;rft.pub=U.S.+Bureau+of+Mines&amp;rft.date=1985&amp;rft.aulast=Jensen&amp;rft.aufirst=N.+L.&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-77"><b><a href="#cite_ref-77">^</a></b> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="http://www.medicalnewstoday.com/releases/91994.php">„IsoRay's Cesium-131 Medical Isotope Used In Milestone Procedure Treating Eye Cancers At Tufts-New England Medical Center”</a>. Medicalnewstoday.com. <time datetime="2007-12-17">17 decembrie 2007</time><span class="reference-accessdate">. Accesat în <time datetime="2012-04-01">1 aprilie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=IsoRay%27s+Cesium-131+Medical+Isotope+Used+In+Milestone+Procedure+Treating+Eye+Cancers+At+Tufts-New+England+Medical+Center&amp;rft.pub=Medicalnewstoday.com&amp;rft.date=2007-12-17&amp;rft_id=http%3A%2F%2Fwww.medicalnewstoday.com%2Freleases%2F91994.php&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-78"><b><a href="#cite_ref-78">^</a></b> <span class="reference-text"><cite class="citation book">Bentel, Gunilla Carleson (<time datetime="1996">1996</time>). „Caesium-137 Machines”. <a rel="nofollow" class="external text" href="http://books.google.com/books?id=bk0go_-FO5QC&amp;pg=PA22"><i>Radiation therapy planning</i></a>. McGraw-Hill Professional. p.&#160;22. <a href="/wiki/International_Standard_Book_Number" title="International Standard Book Number">ISBN</a>&#160;<a href="/wiki/Special:Referin%C8%9Be_%C3%AEn_c%C4%83r%C8%9Bi/978-0-07-005115-7" title="Special:Referințe în cărți/978-0-07-005115-7">978-0-07-005115-7</a><span class="reference-accessdate">. Accesat în <time datetime="2012-04-01">1 aprilie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Caesium-137+Machines&amp;rft.btitle=Radiation+therapy+planning&amp;rft.pages=22&amp;rft.pub=McGraw-Hill+Professional&amp;rft.date=1996&amp;rft.isbn=978-0-07-005115-7&amp;rft.aulast=Bentel&amp;rft.aufirst=Gunilla+Carleson&amp;rft_id=http%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3Dbk0go_-FO5QC%26pg%3DPA22&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span> <span style="font-size:100%" class="error citation-comment">Mai multe valori specificate pentru <code style="color:inherit; border:inherit; padding:inherit;">&#124;pages=</code> și <code style="color:inherit; border:inherit; padding:inherit;">&#124;page=</code> (<a href="/wiki/Ajutor:Erori_CS1#redundant_parameters" title="Ajutor:Erori CS1">ajutor</a>)</span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-79"><b><a href="#cite_ref-79">^</a></b> <span class="reference-text"><cite class="citation book">National Research Council (U.S.). 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Accesat în <time datetime="2012-04-01">1 aprilie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Radiation+source+use+and+replacement%3A+abbreviated+version&amp;rft.pub=National+Academies+Press&amp;rft.date=2008&amp;rft.isbn=978-0-309-11014-3&amp;rft.au=National+Research+Council+%28U.S.%29.+Committee+on+Radiation+Source+Use+and+Replacement&amp;rft_id=http%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3D3cT2REdXJ98C&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-gauges-80"><b><a href="#cite_ref-gauges_80-0">^</a></b> <span class="reference-text"><cite class="citation book">Loxton, R., Pope, P., ed. 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Accesat în <time datetime="2012-04-01">1 aprilie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Level+and+density+measurement+using+non-contact+nuclear+gauges&amp;rft.btitle=Instrumentation+%3A+A+Reader&amp;rft.place=London&amp;rft.pages=82-85&amp;rft.pub=Chapman+%26+Hall&amp;rft.date=1995&amp;rft.isbn=978-0-412-53400-3&amp;rft_id=http%3A%2F%2Fbooks.google.com%2F%3Fid%3DRwsoQbHYjvwC%26pg%3DPA82&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><span class="citation-comment" style="display:none; color:#33aa33; margin-left:0.3em">Mentenanță CS1: Nume multiple: lista editorilor (<a href="/wiki/Categorie:Mentenan%C8%9B%C4%83_CS1:_Nume_multiple:_lista_editorilor" title="Categorie:Mentenanță CS1: Nume multiple: lista editorilor">link</a>) </span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-81"><b><a href="#cite_ref-81">^</a></b> <span class="reference-text"><cite class="citation journal">Timur, A.; Toksoz, M. 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Accesat în <time datetime="2012-04-01">1 aprilie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.atitle=Isotope+Tracers+Project+%E2%80%93+Resources+on+Isotopes+%E2%80%93+Cesium&amp;rft.aulast=Kendall&amp;rft.aufirst=Carol&amp;rft_id=http%3A%2F%2Fwwwrcamnl.wr.usgs.gov%2Fisoig%2Fperiod%2Fcs_iig.html&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-83"><b><a href="#cite_ref-83">^</a></b> <span class="reference-text"><a rel="nofollow" class="external free" href="http://books.google.com/books?id=pWDQnxd-r1UC&amp;pg=PT360">http://books.google.com/books?id=pWDQnxd-r1UC&amp;pg=PT360</a> &amp;pg=PT12</span> </li> <li id="cite_note-84"><b><a href="#cite_ref-84">^</a></b> <span class="reference-text">Datele luate de la <a rel="nofollow" class="external text" href="http://atom.kaeri.re.kr/">OECD report </a> și din <i>The radiochemical Manual</i> (2nd ed.) 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Accesat în <time datetime="2012-04-01">1 aprilie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=BBC+News&amp;rft.atitle=Chinezii+%27g%C4%83sesc%27+mingi+radioactive&amp;rft.date=2009-03-27&amp;rft_id=http%3A%2F%2Fnews.bbc.co.uk%2F2%2Fhi%2Fasia-pacific%2F7967285.stm&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> <li id="cite_note-95"><b><a href="#cite_ref-95">^</a></b> <span class="reference-text"><cite class="citation news">Charbonneau, Louis (<time datetime="2003-03-12">12 martie 2003</time>). <a rel="nofollow" class="external text" href="http://www.washingtonpost.com/ac2/wp-dyn/A12629-2003Mar11">„directorul IAEA a atenționată riscul „dirty bomb" (bomblelor murdare)”</a>. <i>Washington Post</i>. 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Accesat în <time datetime="2010-04-28">28 aprilie 2010</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Washington+Post&amp;rft.atitle=directorul+IAEA+a+aten%C8%9Bionat%C4%83+riscul+%E2%80%9Edirty+bomb%E2%80%9D+%28bomblelor+murdare%29&amp;rft.pages=A15&amp;rft.date=2003-03-12&amp;rft.aulast=Charbonneau&amp;rft.aufirst=Louis&amp;rft_id=http%3A%2F%2Fwww.washingtonpost.com%2Fac2%2Fwp-dyn%2FA12629-2003Mar11&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span> <span style="font-size:100%" class="error citation-comment">Text "date 2003-03-12" ignorat (<a href="/wiki/Ajutor:Erori_CS1#text_ignored" title="Ajutor:Erori CS1">ajutor</a>)</span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Bibliografie">Bibliografie</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=22" title="Modifică secțiunea: Bibliografie" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=22" title="Edit section&#39;s source code: Bibliografie"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>V Vasilescu <i>Biofizica medicala</i> EDP 1977</li></ul> <div class="mw-heading mw-heading2"><h2 id="Legături_externe"><span id="Leg.C4.83turi_externe"></span>Legături externe</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesiu&amp;veaction=edit&amp;section=23" title="Modifică secțiunea: Legături externe" class="mw-editsection-visualeditor"><span>modificare</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesiu&amp;action=edit&amp;section=23" title="Edit section&#39;s source code: Legături externe"><span>modificare sursă</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite class="citation web">Daniel A. Steck. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20141126221703/http://george.ph.utexas.edu/~dsteck/alkalidata/cesiumnumbers.pdf">„Cesium D Line Data”</a> <span style="font-size:85%;">(PDF)</span>. Los Alamos National Laboratory (technical report LA-UR-03-7943). Arhivat din <a rel="nofollow" class="external text" href="http://george.ph.utexas.edu/~dsteck/alkalidata/cesiumnumbers.pdf">original</a> <span style="font-size:85%;">(PDF)</span> la <time datetime="2014-11-26">26 noiembrie 2014</time><span class="reference-accessdate">. Accesat în <time datetime="2012-04-01">1 aprilie 2012</time></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=Cesium+D+Line+Data&amp;rft.pub=Los+Alamos+National+Laboratory+%28technical+report+LA-UR-03-7943%29&amp;rft.au=Daniel+A.+Steck&amp;rft_id=http%3A%2F%2Fgeorge.ph.utexas.edu%2F~dsteck%2Falkalidata%2Fcesiumnumbers.pdf&amp;rfr_id=info%3Asid%2Fro.wikipedia.org%3ACesiu" class="Z3988"><span style="display:none;">&#160;</span></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r16236537" /></li> <li><a rel="nofollow" class="external text" href="http://www.webelements.com/caesium/">WebElements.com – Caesium</a></li> <li><a rel="nofollow" class="external text" href="http://www.cs.rochester.edu/users/faculty/nelson/cesium/cesium_faq.html">Humor site dedicated to caesium</a></li></ul> <div role="navigation" class="navbox" aria-labelledby="Compușii_cesiului" style="padding:3px"><table class="nowraplinks collapsible uncollapsed navbox-inner" style="border-spacing:0;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div class="plainlinks hlist navbar mini"><ul><li class="nv-view"><a href="/wiki/Format:Compu%C8%99ii_cesiului" title="Format:Compușii cesiului"><abbr title="Vizualizează acest format" style=";;border:none;-moz-box-shadow:none;-webkit-box-shadow:none;box-shadow:none;">v</abbr></a></li><li class="nv-talk"><a href="/w/index.php?title=Discu%C8%9Bie_Format:Compu%C8%99ii_cesiului&amp;action=edit&amp;redlink=1" class="new" title="Discuție Format:Compușii cesiului — pagină inexistentă"><abbr title="Discută acest format" style=";;border:none;-moz-box-shadow:none;-webkit-box-shadow:none;box-shadow:none;">d</abbr></a></li><li class="nv-edit"><a class="external text" href="https://ro.wikipedia.org/w/index.php?title=Format:Compu%C8%99ii_cesiului&amp;action=edit"><abbr title="Modifică acest format" 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<a href="/wiki/Hidroxid_de_cesiu" title="Hidroxid de cesiu">CsOH</a> • <a href="/wiki/Carbonat_de_cesiu" title="Carbonat de cesiu">Cs<sub>2</sub>CO<sub>3</sub></a> • <a href="/wiki/Sulfat_de_cesiu" title="Sulfat de cesiu">Cs<sub>2</sub>SO<sub>4</sub></a> • <a href="/wiki/Acetat_de_cesiu" title="Acetat de cesiu">CsC<sub>2</sub>H<sub>3</sub>O<sub>2</sub></a> • <a href="/wiki/Oxid_de_cesiu" title="Oxid de cesiu">Cs<sub>2</sub>O</a> • <a href="/w/index.php?title=Titanat_de_cesiu&amp;action=edit&amp;redlink=1" class="new" title="Titanat de cesiu — pagină inexistentă">Cs<sub>2</sub>TiO<sub>2</sub></a> • <a href="/wiki/Aurur%C4%83_de_cesiu" title="Aurură de cesiu">CsAu</a> • <a href="/w/index.php?title=Cianur%C4%83_de_cesiu&amp;action=edit&amp;redlink=1" class="new" title="Cianură de cesiu — pagină inexistentă">CsCN</a></div></td></tr></tbody></table></div><style data-mw-deduplicate="TemplateStyles:r16786155">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid 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.mw-parser-output .navbox-abovebelow,html.skin-theme-clientpref-os .mw-parser-output .navbox-group,html.skin-theme-clientpref-os .mw-parser-output .navbox-image,html.skin-theme-clientpref-os .mw-parser-output .navbox-list{background:inherit!important;color:inherit!important;border-top:2px solid #fdfdfd!important}html.skin-theme-clientpref-os .mw-parser-output .navbox,html.skin-theme-clientpref-os .mw-parser-output .navbox-subgroup,html.skin-theme-clientpref-os .mw-parser-output .navbox-group,html.skin-theme-clientpref-os .mw-parser-output .navbox-even,html.skin-theme-clientpref-os .mw-parser-output .navbox-abovebelow,html.skin-theme-clientpref-os .mw-parser-output .navbox-title{background:inherit!important;color:inherit!important;border-color:#54595d!important}html.skin-theme-clientpref-os .mw-parser-output .whiteText{color:#fff}}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important;background:transparent!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important;background:transparent!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style> <div role="navigation" class="navbox" aria-labelledby="Elemente_chimice" style="padding:3px"><table class="nowraplinks collapsible uncollapsed navbox-inner" style="border-spacing:0;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="3"><div class="plainlinks hlist navbar mini"><ul><li class="nv-view"><a href="/wiki/Format:Elemente_chimice" title="Format:Elemente chimice"><abbr title="Vizualizează acest format" style=";;border:none;-moz-box-shadow:none;-webkit-box-shadow:none;box-shadow:none;">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Discu%C8%9Bie_Format:Elemente_chimice" title="Discuție Format:Elemente chimice"><abbr title="Discută acest format" style=";;border:none;-moz-box-shadow:none;-webkit-box-shadow:none;box-shadow:none;">d</abbr></a></li><li class="nv-edit"><a class="external text" href="https://ro.wikipedia.org/w/index.php?title=Format:Elemente_chimice&amp;action=edit"><abbr title="Modifică acest format" style=";;border:none;-moz-box-shadow:none;-webkit-box-shadow:none;box-shadow:none;">m</abbr></a></li></ul></div><div id="Elemente_chimice" class="whiteText" style="font-size:100%;margin:0 4em"><a href="/wiki/Element_chimic" title="Element chimic">Elemente chimice</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Metale alcaline</th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"><a href="/wiki/Litiu" title="Litiu">Litiu</a> (3) • <a href="/wiki/Sodiu" title="Sodiu">Sodiu</a> (11) • <a href="/wiki/Potasiu" title="Potasiu">Potasiu</a> (19) • <a href="/wiki/Rubidiu" title="Rubidiu">Rubidiu</a> (37) • <a class="mw-selflink selflink">Cesiu</a> (55) • <a href="/wiki/Franciu" title="Franciu">Franciu</a> (87) • <a href="/wiki/Ununenniu" title="Ununenniu">Ununenniu</a> (119)</div></td><td class="navbox-image" rowspan="11" style="width:1px;padding:0px 0px 0px 2px"><div><span typeof="mw:File"><a href="/wiki/Fi%C8%99ier:TableImage.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f0/TableImage.png/80px-TableImage.png" decoding="async" width="80" height="23" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f0/TableImage.png/120px-TableImage.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f0/TableImage.png/160px-TableImage.png 2x" data-file-width="250" data-file-height="73" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Metale alcalino-pământoase</th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"><a href="/wiki/Beriliu" title="Beriliu">Beriliu</a> (4) • <a href="/wiki/Magneziu" title="Magneziu">Magneziu</a> (12) • <a href="/wiki/Calciu" title="Calciu">Calciu</a> (20) • <a href="/wiki/Stron%C8%9Biu" title="Stronțiu">Stronțiu</a> (38) • <a href="/wiki/Bariu" title="Bariu">Bariu</a> (56) • <a href="/wiki/Radiu" title="Radiu">Radiu</a> (88) • <a href="/wiki/Unbinilium" title="Unbinilium">Unbinilium</a> (120)</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Metale tranziționale</th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"><a href="/wiki/Scandiu" title="Scandiu">Scandiu</a> (21) • <a href="/wiki/Titan" title="Titan">Titan</a> (22) • <a href="/wiki/Vanadiu" title="Vanadiu">Vanadiu</a> (23) • <a href="/wiki/Crom" title="Crom">Crom</a> (24) • <a href="/wiki/Mangan" title="Mangan">Mangan</a> (25) • <a href="/wiki/Fier" title="Fier">Fier</a> (26) • <a href="/wiki/Cobalt" title="Cobalt">Cobalt</a> (27) • <a href="/wiki/Nichel" title="Nichel">Nichel</a> (28) • <a href="/wiki/Cupru" title="Cupru">Cupru</a> (29) • <a href="/wiki/Zinc" title="Zinc">Zinc</a> (30) • <a href="/wiki/Ytriu" title="Ytriu">Ytriu</a> (39) • <a href="/wiki/Zirconiu" title="Zirconiu">Zirconiu</a> (40) • <a href="/wiki/Niobiu" title="Niobiu">Niobiu</a> (41) • <a href="/wiki/Molibden" title="Molibden">Molibden</a> (42) • <a href="/wiki/Techne%C8%9Biu" title="Technețiu">Technețiu</a> (43) • <a href="/wiki/Ruteniu" title="Ruteniu">Ruteniu</a> (44) • <a href="/wiki/Rodiu" title="Rodiu">Rodiu</a> (45) • <a href="/wiki/Paladiu" title="Paladiu">Paladiu</a> (46) • <a href="/wiki/Argint" title="Argint">Argint</a> (47) • <a href="/wiki/Cadmiu" title="Cadmiu">Cadmiu</a> (48) • <a href="/wiki/Hafniu" title="Hafniu">Hafniu</a> (72) • <a href="/wiki/Tantal" title="Tantal">Tantal</a> (73) • <a href="/wiki/Wolfram" title="Wolfram">Wolfram</a> (74) • <a href="/wiki/Reniu" title="Reniu">Reniu</a> (75) • <a href="/wiki/Osmiu" title="Osmiu">Osmiu</a> (76) • <a href="/wiki/Iridiu" title="Iridiu">Iridiu</a> (77) • <a href="/wiki/Platin%C4%83" title="Platină">Platină</a> (78) • <a href="/wiki/Aur" title="Aur">Aur</a> (79) • <a href="/wiki/Mercur_(element)" title="Mercur (element)">Mercur</a> (80) • <a href="/wiki/Rutherfordiu" title="Rutherfordiu">Rutherfordiu</a> (104) • <a href="/wiki/Dubniu" title="Dubniu">Dubniu</a> (105) • <a href="/wiki/Seaborgiu" title="Seaborgiu">Seaborgiu</a> (106) • <a href="/wiki/Bohriu" title="Bohriu">Bohriu</a> (107) • <a href="/wiki/Hassiu" title="Hassiu">Hassiu</a> (108) • <a href="/wiki/Meitneriu" title="Meitneriu">Meitneriu</a> (109) • <a href="/wiki/Darmstadtiu" title="Darmstadtiu">Darmstadtiu</a> (110) • <a href="/wiki/Roentgeniu" title="Roentgeniu">Roentgeniu</a> (111) • <a href="/wiki/Coperniciu" title="Coperniciu">Coperniciu</a> (112) • <a href="/wiki/Nihoniu" title="Nihoniu">Nihoniu</a> (113) • <a href="/wiki/Fleroviu" title="Fleroviu">Fleroviu</a> (114) • <a href="/wiki/Moscoviu" title="Moscoviu">Moscoviu</a> (115) • <a href="/wiki/Livermoriu" title="Livermoriu">Livermoriu</a> (116)</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Metale post-tranziționale</th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"><a href="/wiki/Aluminiu" title="Aluminiu">Aluminiu</a> (13) • <a href="/wiki/Galiu" title="Galiu">Galiu</a> (31) • <a href="/wiki/Indiu" title="Indiu">Indiu</a> (49) • <a href="/wiki/Staniu" title="Staniu">Staniu</a> (50) • <a href="/wiki/Taliu" title="Taliu">Taliu</a> (81) • <a href="/wiki/Plumb" title="Plumb">Plumb</a> (82) • <a href="/wiki/Bismut" title="Bismut">Bismut</a> (83) • <a href="/wiki/Poloniu" title="Poloniu">Poloniu</a> (84)</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Metaloizi</th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"><a href="/wiki/Bor_(element)" title="Bor (element)">Bor</a> (5) • <a href="/wiki/Siliciu" title="Siliciu">Siliciu</a> (14) • <a href="/wiki/Germaniu" title="Germaniu">Germaniu</a> (32) • <a href="/wiki/Arsen" title="Arsen">Arsen</a> (33) • <a href="/wiki/Stibiu" title="Stibiu">Stibiu</a> (51) • <a href="/wiki/Telur" title="Telur">Telur</a> (52)</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Nemetale</th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"><a href="/wiki/Hidrogen" title="Hidrogen">Hidrogen</a> (1) • <a href="/wiki/Carbon" title="Carbon">Carbon</a> (6) • <a href="/wiki/Azot" title="Azot">Azot</a> (7) • <a href="/wiki/Oxigen" title="Oxigen">Oxigen</a> (8) • <a href="/wiki/Fosfor" title="Fosfor">Fosfor</a> (15) • <a href="/wiki/Sulf" title="Sulf">Sulf</a> (16) • <a href="/wiki/Seleniu" title="Seleniu">Seleniu</a> (34)</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Halogeni</th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"><a href="/wiki/Fluor" title="Fluor">Fluor</a> (9) • <a href="/wiki/Clor" title="Clor">Clor</a> (17) • <a href="/wiki/Brom" title="Brom">Brom</a> (35) • <a href="/wiki/Iod" title="Iod">Iod</a> (53) • <a href="/wiki/Astatin" title="Astatin">Astatin</a> (85) • <a href="/wiki/Tennessin" title="Tennessin">Tennessin</a> (117)</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Gaze nobile</th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"><a href="/wiki/Heliu" title="Heliu">Heliu</a> (2) • <a href="/wiki/Neon" title="Neon">Neon</a> (10) • <a href="/wiki/Argon" title="Argon">Argon</a> (18) • <a href="/wiki/Kripton" title="Kripton">Kripton</a> (36) • <a href="/wiki/Xenon" title="Xenon">Xenon</a> (54) • <a href="/wiki/Radon" title="Radon">Radon</a> (86) • <a href="/wiki/Oganesson" title="Oganesson">Oganesson</a> (118)</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Lantanide</th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"><a href="/wiki/Lantan" title="Lantan">Lantan</a> (57) • <a href="/wiki/Ceriu" title="Ceriu">Ceriu</a> (58) • <a href="/wiki/Praseodim" title="Praseodim">Praseodim</a> (59) • <a href="/wiki/Neodim" title="Neodim">Neodim</a> (60) • <a href="/wiki/Prome%C8%9Biu" title="Promețiu">Promețiu</a> (61) • <a href="/wiki/Samariu" title="Samariu">Samariu</a> (62) • <a href="/wiki/Europiu" title="Europiu">Europiu</a> (63) • <a href="/wiki/Gadoliniu" title="Gadoliniu">Gadoliniu</a> (64) <a href="/wiki/Terbiu" title="Terbiu">Terbiu</a> (65) • <a href="/wiki/Disprosiu" title="Disprosiu">Disprosiu</a> (66) • <a href="/wiki/Holmiu" title="Holmiu">Holmiu</a> (67) • <a href="/wiki/Erbiu" title="Erbiu">Erbiu</a> (68) • <a href="/wiki/Tuliu" title="Tuliu">Tuliu</a> (69) • <a href="/wiki/Yterbiu" title="Yterbiu">Yterbiu</a> (70) • <a href="/wiki/Lute%C8%9Biu" title="Lutețiu">Lutețiu</a> (71)</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Actinide</th><td class="navbox-list navbox-even" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"><a href="/wiki/Actiniu" title="Actiniu">Actiniu</a> (89) • <a href="/wiki/Thoriu" title="Thoriu">Thoriu</a> (90) • <a href="/wiki/Protactiniu" title="Protactiniu">Protactiniu</a> (91) • <a href="/wiki/Uraniu" title="Uraniu">Uraniu</a> (92) • <a href="/wiki/Neptuniu" title="Neptuniu">Neptuniu</a> (93) • <a href="/wiki/Plutoniu" title="Plutoniu">Plutoniu</a> (94) • <a href="/wiki/Americiu" title="Americiu">Americiu</a> (95) • <a href="/wiki/Curiu" title="Curiu">Curiu</a> (96) • <a href="/wiki/Berkeliu" title="Berkeliu">Berkeliu</a> (97) • <a href="/wiki/Californiu" title="Californiu">Californiu</a> (98) • <a href="/wiki/Einsteiniu" title="Einsteiniu">Einsteiniu</a> (99) • <a href="/wiki/Fermiu" title="Fermiu">Fermiu</a> (100) • <a href="/wiki/Mendeleviu" title="Mendeleviu">Mendeleviu</a> (101) • <a href="/wiki/Nobeliu" title="Nobeliu">Nobeliu</a> (102) • <a href="/wiki/Lawrenciu" title="Lawrenciu">Lawrenciu</a> (103)</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Superactinide</th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"><a href="/wiki/Unbiunium" class="mw-redirect" title="Unbiunium">Unbiunium</a> (121) • <a href="/wiki/Unbibium" class="mw-redirect" title="Unbibium">Unbibium</a> (122) • <a href="/wiki/Unbitrium" class="mw-redirect" title="Unbitrium">Unbitrium</a> (123) • <a href="/wiki/Unbiquadium" class="mw-redirect" title="Unbiquadium">Unbiquadium</a> (124) • <a href="/wiki/Unbipentium" class="mw-redirect" title="Unbipentium">Unbipentium</a> (125) • <a href="/wiki/Unbihexium" class="mw-redirect" title="Unbihexium">Unbihexium</a> (126) • <a href="/wiki/Unbiseptium" class="mw-redirect" title="Unbiseptium">Unbiseptium</a> (127) • <a href="/wiki/Unbioctium" class="mw-redirect" title="Unbioctium">Unbioctium</a> (128) • <a href="/wiki/Unbiennium" class="mw-redirect" title="Unbiennium">Unbiennium</a> (129) • <a href="/wiki/Untrinilium" class="mw-redirect" 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