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<span class="vector-toc-numb">1</span> <span>Ontdekking</span> </div> </a> <ul id="toc-Ontdekking-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Toepassingen" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Toepassingen"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Toepassingen</span> </div> </a> <ul id="toc-Toepassingen-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Opmerkelijke_eigenschappen" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Opmerkelijke_eigenschappen"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Opmerkelijke eigenschappen</span> </div> </a> <ul id="toc-Opmerkelijke_eigenschappen-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Verschijning" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Verschijning"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Verschijning</span> </div> </a> <ul id="toc-Verschijning-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Isotopen" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Isotopen"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Isotopen</span> </div> </a> <ul id="toc-Isotopen-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Toxicologie_en_veiligheid" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Toxicologie_en_veiligheid"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Toxicologie en veiligheid</span> </div> </a> <ul id="toc-Toxicologie_en_veiligheid-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Externe_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Externe_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Externe links</span> </div> </a> <ul id="toc-Externe_links-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="Inhoud" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Inhoudsopgave" > <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="Inhoudsopgave omschakelen" > <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">Inhoudsopgave omschakelen</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">Cesium</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="Ga naar een artikel in een andere taal. Beschikbaar in 148 talen" > <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 talen</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 – Amhaars" lang="am" hreflang="am" data-title="ሴሲየም" data-language-autonym="አማርኛ" data-language-local-name="Amhaars" 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 – Aragonees" lang="an" hreflang="an" data-title="Cesio" data-language-autonym="Aragonés" data-language-local-name="Aragonees" 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 – Arabisch" lang="ar" hreflang="ar" data-title="سيزيوم" data-language-autonym="العربية" data-language-local-name="Arabisch" 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 – Marokkaans Arabisch" lang="ary" hreflang="ary" data-title="سيزيوم" data-language-autonym="الدارجة" data-language-local-name="Marokkaans Arabisch" 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 – Egyptisch Arabisch" lang="arz" hreflang="arz" data-title="سيزيوم" data-language-autonym="مصرى" data-language-local-name="Egyptisch Arabisch" 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 – Asturisch" lang="ast" hreflang="ast" data-title="Cesiu" data-language-autonym="Asturianu" data-language-local-name="Asturisch" 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 – Azerbeidzjaans" lang="az" hreflang="az" data-title="Sezium" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbeidzjaans" 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 – Basjkiers" lang="ba" hreflang="ba" data-title="Цезий" data-language-autonym="Башҡортса" data-language-local-name="Basjkiers" 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 – Balinees" lang="ban" hreflang="ban" data-title="Sésium" data-language-autonym="Basa Bali" data-language-local-name="Balinees" 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 – Belarussisch" lang="be" hreflang="be" data-title="Цэзій" data-language-autonym="Беларуская" data-language-local-name="Belarussisch" 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 – Bulgaars" lang="bg" hreflang="bg" data-title="Цезий" data-language-autonym="Български" data-language-local-name="Bulgaars" 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 – Bengaals" lang="bn" hreflang="bn" data-title="সিজিয়াম" data-language-autonym="বাংলা" data-language-local-name="Bengaals" 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། – Tibetaans" lang="bo" hreflang="bo" data-title="སྰེ་སིམ།" data-language-autonym="བོད་ཡིག" data-language-local-name="Tibetaans" 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 – Bretons" lang="br" hreflang="br" data-title="Keziom" data-language-autonym="Brezhoneg" data-language-local-name="Bretons" 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 – Bosnisch" lang="bs" hreflang="bs" data-title="Cezij" data-language-autonym="Bosanski" data-language-local-name="Bosnisch" 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 – Catalaans" lang="ca" hreflang="ca" data-title="Cesi" data-language-autonym="Català" data-language-local-name="Catalaans" 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 – Cebuano" lang="ceb" hreflang="ceb" data-title="Cesyo" data-language-autonym="Cebuano" data-language-local-name="Cebuano" 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 – Soranî" lang="ckb" hreflang="ckb" data-title="سیزیۆم" data-language-autonym="کوردی" data-language-local-name="Soranî" 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 – Corsicaans" lang="co" hreflang="co" data-title="Cesiu" data-language-autonym="Corsu" data-language-local-name="Corsicaans" 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 – Tsjechisch" lang="cs" hreflang="cs" data-title="Cesium" data-language-autonym="Čeština" data-language-local-name="Tsjechisch" 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 – Tsjoevasjisch" lang="cv" hreflang="cv" data-title="Цезий" data-language-autonym="Чӑвашла" data-language-local-name="Tsjoevasjisch" 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 – Welsh" lang="cy" hreflang="cy" data-title="Cesiwm" data-language-autonym="Cymraeg" data-language-local-name="Welsh" 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 – Deens" lang="da" hreflang="da" data-title="Cæsium" data-language-autonym="Dansk" data-language-local-name="Deens" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de badge-Q17437796 badge-featuredarticle mw-list-item" title="uitgelicht artikel"><a href="https://de.wikipedia.org/wiki/Caesium" title="Caesium – Duits" lang="de" hreflang="de" data-title="Caesium" data-language-autonym="Deutsch" data-language-local-name="Duits" 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 – Grieks" lang="el" hreflang="el" data-title="Καίσιο" data-language-autonym="Ελληνικά" data-language-local-name="Grieks" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en badge-Q17437796 badge-featuredarticle mw-list-item" title="uitgelicht artikel"><a href="https://en.wikipedia.org/wiki/Caesium" title="Caesium – Engels" lang="en" hreflang="en" data-title="Caesium" data-language-autonym="English" data-language-local-name="Engels" 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 – Spaans" lang="es" hreflang="es" data-title="Cesio" data-language-autonym="Español" data-language-local-name="Spaans" 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 – Estisch" lang="et" hreflang="et" data-title="Tseesium" data-language-autonym="Eesti" data-language-local-name="Estisch" 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 – Baskisch" lang="eu" hreflang="eu" data-title="Zesio" data-language-autonym="Euskara" data-language-local-name="Baskisch" 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 – Perzisch" lang="fa" hreflang="fa" data-title="سزیم" data-language-autonym="فارسی" data-language-local-name="Perzisch" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi badge-Q17559452 badge-recommendedarticle mw-list-item" title="aanbevolen artikel"><a href="https://fi.wikipedia.org/wiki/Cesium" title="Cesium – Fins" lang="fi" hreflang="fi" data-title="Cesium" data-language-autonym="Suomi" data-language-local-name="Fins" 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 – Faeröers" lang="fo" hreflang="fo" data-title="Sesium" data-language-autonym="Føroyskt" data-language-local-name="Faeröers" 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 – Frans" lang="fr" hreflang="fr" data-title="Césium" data-language-autonym="Français" data-language-local-name="Frans" 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 – Noord-Fries" lang="frr" hreflang="frr" data-title="Tseesium" data-language-autonym="Nordfriisk" data-language-local-name="Noord-Fries" 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 – Friulisch" lang="fur" hreflang="fur" data-title="Cesi" data-language-autonym="Furlan" data-language-local-name="Friulisch" 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 – Iers" lang="ga" hreflang="ga" data-title="Caeisiam" data-language-autonym="Gaeilge" data-language-local-name="Iers" 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 – Ganyu" lang="gan" hreflang="gan" data-title="銫" data-language-autonym="贛語" data-language-local-name="Ganyu" 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 – Schots-Gaelisch" lang="gd" hreflang="gd" data-title="Caesium" data-language-autonym="Gàidhlig" data-language-local-name="Schots-Gaelisch" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl badge-Q17437796 badge-featuredarticle mw-list-item" title="uitgelicht artikel"><a href="https://gl.wikipedia.org/wiki/Cesio" title="Cesio – Galicisch" lang="gl" hreflang="gl" data-title="Cesio" data-language-autonym="Galego" data-language-local-name="Galicisch" 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 – Hakka" lang="hak" hreflang="hak" data-title="Caesium" data-language-autonym="客家語 / Hak-kâ-ngî" data-language-local-name="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 – Hebreeuws" lang="he" hreflang="he" data-title="צסיום" data-language-autonym="עברית" data-language-local-name="Hebreeuws" 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 – Fijisch Hindi" lang="hif" hreflang="hif" data-title="Caesium" data-language-autonym="Fiji Hindi" data-language-local-name="Fijisch 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 – Kroatisch" lang="hr" hreflang="hr" data-title="Cezij" data-language-autonym="Hrvatski" data-language-local-name="Kroatisch" 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 – Haïtiaans Creools" lang="ht" hreflang="ht" data-title="Sezyòm" data-language-autonym="Kreyòl ayisyen" data-language-local-name="Haïtiaans Creools" 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 – Hongaars" lang="hu" hreflang="hu" data-title="Cézium" data-language-autonym="Magyar" data-language-local-name="Hongaars" 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 – Armeens" lang="hy" hreflang="hy" data-title="Ցեզիում" data-language-autonym="Հայերեն" data-language-local-name="Armeens" 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 – Indonesisch" lang="id" hreflang="id" data-title="Sesium" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesisch" 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 – IJslands" lang="is" hreflang="is" data-title="Sesín" data-language-autonym="Íslenska" data-language-local-name="IJslands" 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 – Italiaans" lang="it" hreflang="it" data-title="Cesio" data-language-autonym="Italiano" data-language-local-name="Italiaans" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja badge-Q17437798 badge-goodarticle mw-list-item" title="goed artikel"><a href="https://ja.wikipedia.org/wiki/%E3%82%BB%E3%82%B7%E3%82%A6%E3%83%A0" title="セシウム – Japans" lang="ja" hreflang="ja" data-title="セシウム" data-language-autonym="日本語" data-language-local-name="Japans" 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 – Javaans" lang="jv" hreflang="jv" data-title="Sésium" data-language-autonym="Jawa" data-language-local-name="Javaans" 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 – Georgisch" lang="ka" hreflang="ka" data-title="ცეზიუმი" data-language-autonym="ქართული" data-language-local-name="Georgisch" 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 – Kazachs" lang="kk" hreflang="kk" data-title="Цезий" data-language-autonym="Қазақша" data-language-local-name="Kazachs" 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 – Koreaans" lang="ko" hreflang="ko" data-title="세슘" data-language-autonym="한국어" data-language-local-name="Koreaans" 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 – Koerdisch" lang="ku" hreflang="ku" data-title="Sezyûm" data-language-autonym="Kurdî" data-language-local-name="Koerdisch" 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 – Cornish" lang="kw" hreflang="kw" data-title="Cesiom" data-language-autonym="Kernowek" data-language-local-name="Cornish" 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 – Kirgizisch" lang="ky" hreflang="ky" data-title="Цезий" data-language-autonym="Кыргызча" data-language-local-name="Kirgizisch" 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 – Latijn" lang="la" hreflang="la" data-title="Caesium" data-language-autonym="Latina" data-language-local-name="Latijn" 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 – Luxemburgs" lang="lb" hreflang="lb" data-title="Cäsium" data-language-autonym="Lëtzebuergesch" data-language-local-name="Luxemburgs" 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) – Luganda" lang="lg" hreflang="lg" data-title="Seziyaamu (Cesium)" data-language-autonym="Luganda" data-language-local-name="Luganda" 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 – Limburgs" lang="li" hreflang="li" data-title="Cesium" data-language-autonym="Limburgs" data-language-local-name="Limburgs" 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) – Ligurisch" lang="lij" hreflang="lij" data-title="Çesio (elemento)" data-language-autonym="Ligure" data-language-local-name="Ligurisch" 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 – Lombardisch" lang="lmo" hreflang="lmo" data-title="Cesio" data-language-autonym="Lombard" data-language-local-name="Lombardisch" 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 – Litouws" lang="lt" hreflang="lt" data-title="Cezis" data-language-autonym="Lietuvių" data-language-local-name="Litouws" 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 – Lets" lang="lv" hreflang="lv" data-title="Cēzijs" data-language-autonym="Latviešu" data-language-local-name="Lets" 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 – Moksja" lang="mdf" hreflang="mdf" data-title="Цези" data-language-autonym="Мокшень" data-language-local-name="Moksja" 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 – Macedonisch" lang="mk" hreflang="mk" data-title="Цезиум" data-language-autonym="Македонски" data-language-local-name="Macedonisch" 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 – Mongools" lang="mn" hreflang="mn" data-title="Цези" data-language-autonym="Монгол" data-language-local-name="Mongools" 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 – West-Mari" lang="mrj" hreflang="mrj" data-title="Цезий" data-language-autonym="Кырык мары" data-language-local-name="West-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 – Maleis" lang="ms" hreflang="ms" data-title="Sesium" data-language-autonym="Bahasa Melayu" data-language-local-name="Maleis" 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 – Birmaans" lang="my" hreflang="my" data-title="ဆယ်ဆီယမ်" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="Birmaans" 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 – Nedersaksisch" lang="nds" hreflang="nds" data-title="Cäsium" data-language-autonym="Plattdüütsch" data-language-local-name="Nedersaksisch" 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-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Cesium" title="Cesium – Noors - Nynorsk" lang="nn" hreflang="nn" data-title="Cesium" data-language-autonym="Norsk nynorsk" data-language-local-name="Noors - 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 – Noors - Bokmål" lang="nb" hreflang="nb" data-title="Cesium" data-language-autonym="Norsk bokmål" data-language-local-name="Noors - 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 – Occitaans" lang="oc" hreflang="oc" data-title="Cèsi" data-language-autonym="Occitan" data-language-local-name="Occitaans" 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 – Afaan Oromo" lang="om" hreflang="om" data-title="Seeziyeemii" data-language-autonym="Oromoo" data-language-local-name="Afaan 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 – Ossetisch" lang="os" hreflang="os" data-title="Цезий" data-language-autonym="Ирон" data-language-local-name="Ossetisch" 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 – Pools" lang="pl" hreflang="pl" data-title="Cez" data-language-autonym="Polski" data-language-local-name="Pools" 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 – Piëmontees" lang="pms" hreflang="pms" data-title="Cesio" data-language-autonym="Piemontèis" data-language-local-name="Piëmontees" 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 – Pasjtoe" lang="ps" hreflang="ps" data-title="سېزيوم" data-language-autonym="پښتو" data-language-local-name="Pasjtoe" 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 – Portugees" lang="pt" hreflang="pt" data-title="Césio" data-language-autonym="Português" data-language-local-name="Portugees" 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-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Cesiu" title="Cesiu – Roemeens" lang="ro" hreflang="ro" data-title="Cesiu" data-language-autonym="Română" data-language-local-name="Roemeens" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-roa-rup mw-list-item"><a href="https://roa-rup.wikipedia.org/wiki/Cesiu" title="Cesiu – Aroemeens" lang="rup" hreflang="rup" data-title="Cesiu" data-language-autonym="Armãneashti" data-language-local-name="Aroemeens" 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 – Russisch" lang="ru" hreflang="ru" data-title="Цезий" data-language-autonym="Русский" data-language-local-name="Russisch" 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 – Sanskriet" lang="sa" hreflang="sa" data-title="सेसियम" data-language-autonym="संस्कृतम्" data-language-local-name="Sanskriet" 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 – Jakoets" lang="sah" hreflang="sah" data-title="Сезиум" data-language-autonym="Саха тыла" data-language-local-name="Jakoets" 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 – Sardijns" lang="sc" hreflang="sc" data-title="Tzèsiu" data-language-autonym="Sardu" data-language-local-name="Sardijns" 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) – Siciliaans" lang="scn" hreflang="scn" data-title="Cesiu (elementu)" data-language-autonym="Sicilianu" data-language-local-name="Siciliaans" 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 – Schots" lang="sco" hreflang="sco" data-title="Caesium" data-language-autonym="Scots" data-language-local-name="Schots" 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 – Servo-Kroatisch" lang="sh" hreflang="sh" data-title="Cezij" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Servo-Kroatisch" 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 – Slowaaks" lang="sk" hreflang="sk" data-title="Cézium" data-language-autonym="Slovenčina" data-language-local-name="Slowaaks" 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 – Sloveens" lang="sl" hreflang="sl" data-title="Cezij" data-language-autonym="Slovenščina" data-language-local-name="Sloveens" 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 – Somalisch" lang="so" hreflang="so" data-title="Kaasiyaam" data-language-autonym="Soomaaliga" data-language-local-name="Somalisch" 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 – Albanees" lang="sq" hreflang="sq" data-title="Ceziumi" data-language-autonym="Shqip" data-language-local-name="Albanees" 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 – Servisch" lang="sr" hreflang="sr" data-title="Цезијум" data-language-autonym="Српски / srpski" data-language-local-name="Servisch" 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 – Saterfries" lang="stq" hreflang="stq" data-title="Cesium" data-language-autonym="Seeltersk" data-language-local-name="Saterfries" 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 – Zweeds" lang="sv" hreflang="sv" data-title="Cesium" data-language-autonym="Svenska" data-language-local-name="Zweeds" 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 – Tamil" lang="ta" hreflang="ta" data-title="சீசியம்" data-language-autonym="தமிழ்" data-language-local-name="Tamil" 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 – Tadzjieks" lang="tg" hreflang="tg" data-title="Сезий" data-language-autonym="Тоҷикӣ" data-language-local-name="Tadzjieks" 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 – Thai" lang="th" hreflang="th" data-title="ซีเซียม" data-language-autonym="ไทย" data-language-local-name="Thai" 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 – Turks" lang="tr" hreflang="tr" data-title="Sezyum" data-language-autonym="Türkçe" data-language-local-name="Turks" 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 – Tataars" lang="tt" hreflang="tt" data-title="Цезий" data-language-autonym="Татарча / tatarça" data-language-local-name="Tataars" 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 – Oeigoers" lang="ug" hreflang="ug" data-title="سېزىي" data-language-autonym="ئۇيغۇرچە / Uyghurche" data-language-local-name="Oeigoers" 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 – Oekraïens" lang="uk" hreflang="uk" data-title="Цезій" data-language-autonym="Українська" data-language-local-name="Oekraïens" 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 – Oezbeeks" lang="uz" hreflang="uz" data-title="Seziy" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Oezbeeks" 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 – Wepsisch" lang="vep" hreflang="vep" data-title="Cezii" data-language-autonym="Vepsän kel’" data-language-local-name="Wepsisch" class="interlanguage-link-target"><span>Vepsän kel’</span></a></li><li class="interlanguage-link interwiki-vi badge-Q17437798 badge-goodarticle mw-list-item" title="goed artikel"><a href="https://vi.wikipedia.org/wiki/Caesi" title="Caesi – Vietnamees" lang="vi" hreflang="vi" data-title="Caesi" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamees" 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 – Waals" lang="wa" hreflang="wa" data-title="Ceziom" data-language-autonym="Walon" data-language-local-name="Waals" 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 – Wuyu" lang="wuu" hreflang="wuu" data-title="铯" data-language-autonym="吴语" data-language-local-name="Wuyu" 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 – Kalmuks" lang="xal" hreflang="xal" data-title="Цесиум" data-language-autonym="Хальмг" data-language-local-name="Kalmuks" 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 – Jiddisch" lang="yi" hreflang="yi" data-title="צעז" data-language-autonym="ייִדיש" data-language-local-name="Jiddisch" 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 – Chinees" lang="zh" hreflang="zh" data-title="铯" data-language-autonym="中文" data-language-local-name="Chinees" 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 – Klassiek Chinees" lang="lzh" hreflang="lzh" data-title="銫" data-language-autonym="文言" data-language-local-name="Klassiek Chinees" 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 – Minnanyu" lang="nan" hreflang="nan" data-title="Caesium" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnanyu" 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 – Kantonees" lang="yue" hreflang="yue" data-title="銫" data-language-autonym="粵語" data-language-local-name="Kantonees" 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 – Zoeloe" lang="zu" hreflang="zu" data-title="UmCanga" data-language-autonym="IsiZulu" data-language-local-name="Zoeloe" 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="Taalkoppelingen bewerken" class="wbc-editpage">Koppelingen bewerken</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="Naamruimten"> <div 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class="mw-parser-output"><span id="tpl_Woordenboek"><span typeof="mw:File"><a href="https://nl.wiktionary.org/wiki/cesium" title="Zoek dit woord op in WikiWoordenboek"><img alt="Zoek dit woord op in WikiWoordenboek" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/20px-Wiktionary_small.svg.png" decoding="async" width="18" height="18" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f9/Wiktionary_small.svg/40px-Wiktionary_small.svg.png 1.5x" data-file-width="350" data-file-height="350" /></a></span></span></div></div> </div> <div id="siteSub" class="noprint">Uit Wikipedia, de vrije encyclopedie</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="nl" dir="ltr"><table class="infobox" cellpadding="1" cellspacing="1"> <tbody><tr> <th class="infobox-kop notheme" style="background-color:#cedaf2; color:inherit; text-align:center; font-size:120%;" colspan="3">Cesium </th></tr> <tr> <td style="text-align:center;" colspan="3"><span> <table style="font-size:85%; padding:0; border-collapse:collapse; text-align:center" border="0" align="center" class="vatop"> <tbody><tr> <td> </td> <th><a href="/wiki/Alkalimetaal" title="Alkalimetaal">1</a></th> <th colspan="16"></th> <th><a href="/wiki/Edelgas" title="Edelgas">18</a> </th></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-1-element" title="Periode-1-element">1</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Waterstof_(element)" title="Waterstof (element)">H</a> </td> <th style="vertical-align: middle;"><a href="/wiki/Aardalkalimetaal" title="Aardalkalimetaal">2</a> </th> <th colspan="10" style="text-align:center"><big><a href="/wiki/Periodiek_systeem" title="Periodiek systeem">Periodiek systeem</a></big> </th> <th style="vertical-align: middle;"><a href="/wiki/Boorgroep" title="Boorgroep">13</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Koolstofgroep" title="Koolstofgroep">14</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Stikstofgroep" title="Stikstofgroep">15</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Zuurstofgroep" title="Zuurstofgroep">16</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Halogeen" title="Halogeen">17</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Helium" title="Helium">He</a> </td></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-2-element" title="Periode-2-element">2</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Lithium_(element)" title="Lithium (element)">Li</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Beryllium" title="Beryllium">Be</a> </td> <td colspan="10" align="center"> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Boor_(element)" title="Boor (element)">B</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Koolstof" title="Koolstof">C</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Stikstof_(element)" title="Stikstof (element)">N</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Zuurstof_(element)" title="Zuurstof (element)">O</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Fluor_(element)" title="Fluor (element)">F</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Neon_(element)" title="Neon (element)">Ne</a> </td></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-3-element" title="Periode-3-element">3</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Natrium" title="Natrium">Na</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Magnesium" title="Magnesium">Mg</a> </td> <th style="vertical-align: middle;"><a href="/wiki/Scandiumgroep" title="Scandiumgroep">3</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Titaangroep" title="Titaangroep">4</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Vanadiumgroep" title="Vanadiumgroep">5</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Chroomgroep" title="Chroomgroep">6</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Mangaangroep" title="Mangaangroep">7</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Platinagroep" title="Platinagroep">8</a> </th> <th style="vertical-align: middle;">9 </th> <th style="vertical-align: middle;">10 </th> <th style="vertical-align: middle;"><a href="/wiki/Kopergroep" title="Kopergroep">11</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Zinkgroep" title="Zinkgroep">12</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Aluminium" title="Aluminium">Al</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Silicium" title="Silicium">Si</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Fosfor" title="Fosfor">P</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Zwavel" title="Zwavel">S</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Chloor_(element)" title="Chloor (element)">Cl</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Argon" title="Argon">Ar</a> </td></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-4-element" title="Periode-4-element">4</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Kalium" title="Kalium">K</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Calcium" title="Calcium">Ca</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Scandium" title="Scandium">Sc</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Titanium" title="Titanium">Ti</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Vanadium" title="Vanadium">V</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Chroom_(element)" title="Chroom (element)">Cr</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Mangaan" title="Mangaan">Mn</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/IJzer_(element)" title="IJzer (element)">Fe</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Kobalt" title="Kobalt">Co</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Nikkel" title="Nikkel">Ni</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Koper_(element)" title="Koper (element)">Cu</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Zink_(element)" title="Zink (element)">Zn</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Gallium" title="Gallium">Ga</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Germanium" title="Germanium">Ge</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Arseen" title="Arseen">As</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Seleen" title="Seleen">Se</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Broom_(element)" title="Broom (element)">Br</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Krypton_(element)" title="Krypton (element)">Kr</a> </td></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-5-element" title="Periode-5-element">5</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Rubidium" title="Rubidium">Rb</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Strontium" title="Strontium">Sr</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Yttrium" title="Yttrium">Y</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Zirkonium" title="Zirkonium">Zr</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Niobium" title="Niobium">Nb</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Molybdeen" title="Molybdeen">Mo</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Technetium" title="Technetium">Tc</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Ruthenium" title="Ruthenium">Ru</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Rodium" title="Rodium">Rh</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Palladium_(element)" title="Palladium (element)">Pd</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Zilver" title="Zilver">Ag</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Cadmium" title="Cadmium">Cd</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Indium" title="Indium">In</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Tin_(element)" title="Tin (element)">Sn</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Antimoon" title="Antimoon">Sb</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Telluur" title="Telluur">Te</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Jodium_(element)" title="Jodium (element)">I</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Xenon" title="Xenon">Xe</a> </td></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-6-element" title="Periode-6-element">6</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#fbf"><a class="mw-selflink selflink">Cs</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Barium" title="Barium">Ba</a> </td> <td style="border:1px solid #aaaaaa; vertical-align: middle;" bgcolor="#777"><a href="/wiki/Lanthanide" title="Lanthanide">↓</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Hafnium" title="Hafnium">Hf</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Tantaal" title="Tantaal">Ta</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Wolfraam" title="Wolfraam">W</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Renium" title="Renium">Re</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Osmium" title="Osmium">Os</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Iridium_(element)" title="Iridium (element)">Ir</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Platina" title="Platina">Pt</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Goud" title="Goud">Au</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Kwik" title="Kwik">Hg</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Thallium" title="Thallium">Tl</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Lood_(element)" title="Lood (element)">Pb</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Bismut" title="Bismut">Bi</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Polonium" title="Polonium">Po</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Astaat" title="Astaat">At</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Radon_(element)" title="Radon (element)">Rn</a> </td></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-7-element" title="Periode-7-element">7</a> </th> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Francium" title="Francium">Fr</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Radium" title="Radium">Ra</a> </td> <td width="32" style="border:1px solid #aaaaaa; vertical-align: middle;" bgcolor="#777"><a href="/wiki/Actinide" title="Actinide">↓↓</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Rutherfordium" title="Rutherfordium">Rf</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Dubnium" title="Dubnium">Db</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Seaborgium" title="Seaborgium">Sg</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Bohrium" title="Bohrium">Bh</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Hassium" title="Hassium">Hs</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Meitnerium" title="Meitnerium">Mt</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Darmstadtium" title="Darmstadtium">Ds</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/R%C3%B6ntgenium" title="Röntgenium">Rg</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Copernicium" title="Copernicium">Cn</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Nihonium" title="Nihonium">Nh</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Flerovium" title="Flerovium">Fl</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Moscovium" title="Moscovium">Mc</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Livermorium" title="Livermorium">Lv</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Tennessine" title="Tennessine">Ts</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Oganesson" title="Oganesson">Og</a> </td></tr> <tr> <td colspan="19">  </td></tr> <tr> <th colspan="3" style="vertical-align: middle;"><a href="/wiki/Lanthanide" title="Lanthanide">Lanthaniden</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Lanthaan" title="Lanthaan">La</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Cerium" title="Cerium">Ce</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Praseodymium" title="Praseodymium">Pr</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Neodymium" title="Neodymium">Nd</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Promethium" title="Promethium">Pm</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Samarium" title="Samarium">Sm</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Europium" title="Europium">Eu</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Gadolinium" title="Gadolinium">Gd</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Terbium" title="Terbium">Tb</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Dysprosium" title="Dysprosium">Dy</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Holmium" title="Holmium">Ho</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Erbium" title="Erbium">Er</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Thulium" title="Thulium">Tm</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Ytterbium" title="Ytterbium">Yb</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Lutetium" title="Lutetium">Lu</a> </td> <td> </td></tr> <tr> <th colspan="3" style="vertical-align: middle;"><a href="/wiki/Actinide" title="Actinide">Actiniden</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Actinium" title="Actinium">Ac</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Thorium" title="Thorium">Th</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Protactinium" title="Protactinium">Pa</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Uranium" title="Uranium">U</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Neptunium" title="Neptunium">Np</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Plutonium" title="Plutonium">Pu</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Americium" title="Americium">Am</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Curium" title="Curium">Cm</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Berkelium" title="Berkelium">Bk</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Californium" title="Californium">Cf</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Einsteinium" title="Einsteinium">Es</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Fermium" title="Fermium">Fm</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Mendelevium" title="Mendelevium">Md</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Nobelium" title="Nobelium">No</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Lawrencium" title="Lawrencium">Lr</a> </td> <td> </td></tr></tbody></table></span> </td></tr> <tr> <td style="text-align:center; padding:0;" colspan="3"><span typeof="mw:File"><a href="/wiki/Bestand:Cesium.jpg" class="mw-file-description"><img alt="Ampul met cesium" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Cesium.jpg/304px-Cesium.jpg" decoding="async" width="304" height="228" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Cesium.jpg/456px-Cesium.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Cesium.jpg/608px-Cesium.jpg 2x" data-file-width="4000" data-file-height="3000" /></a></span> </td></tr> <tr> <td style="text-align:center;" colspan="3"><div style="font-size:90%">Ampul met cesium</div> </td></tr> <tr> <th class="infobox-kop notheme" style="background-color:#cedaf2; color:inherit; text-align:center;" colspan="3">Algemeen </th></tr> <tr> <th><a href="/wiki/Lijst_van_chemische_elementen" title="Lijst van chemische elementen">Naam</a> </th> <td colspan="2">Cesium </td></tr> <tr> <th><a href="/wiki/Lijst_van_chemische_elementen" title="Lijst van chemische elementen">Symbool</a> </th> <td colspan="2">Cs </td></tr> <tr> <th><a href="/wiki/Atoomnummer" title="Atoomnummer">Atoomnummer</a> </th> <td colspan="2">55 </td></tr> <tr> <th><a href="/wiki/Groep_(periodiek_systeem)" title="Groep (periodiek systeem)">Groep</a> </th> <td colspan="2"><a href="/wiki/Alkalimetaal" title="Alkalimetaal">Alkalimetalen</a> </td></tr> <tr> <th><a href="/wiki/Periode_(scheikunde)" title="Periode (scheikunde)">Periode</a> </th> <td colspan="2"><a href="/wiki/Periode-6-element" title="Periode-6-element">Periode 6</a> </td></tr> <tr> <th><a href="/wiki/Blok_van_het_periodiek_systeem" title="Blok van het periodiek systeem">Blok</a> </th> <td colspan="2"><a href="/wiki/S-blok" title="S-blok">S-blok</a> </td></tr> <tr> <th><a href="/wiki/Reeks_van_het_periodiek_systeem" title="Reeks van het periodiek systeem">Reeks</a> </th> <td colspan="2"><a href="/wiki/Alkalimetaal" title="Alkalimetaal">Alkalimetalen</a> </td></tr> <tr> <th><a href="/wiki/Kleur" title="Kleur">Kleur</a> </th> <td colspan="2">Zilver/Goud </td></tr> <tr> <th class="infobox-kop notheme" style="background-color:#cedaf2; color:inherit;" colspan="3">Chemische eigenschappen </th></tr> <tr> <th><a href="/wiki/Atoommassa" title="Atoommassa">Atoommassa</a> (<a href="/wiki/Atomaire_massa-eenheid" title="Atomaire massa-eenheid">u</a>) </th> <td colspan="2">132,9054 </td></tr> <tr> <th><a href="/wiki/Elektronenconfiguratie" title="Elektronenconfiguratie">Elektronenconfiguratie</a> </th> <td colspan="2">[<a href="/wiki/Xenon" title="Xenon">Xe</a>]6s<sup>1</sup> </td></tr> <tr> <th><a href="/wiki/Oxidatietoestand" title="Oxidatietoestand">Oxidatietoestanden</a> </th> <td colspan="2">+1 </td></tr> <tr> <th><a href="/wiki/Elektronegativiteit" title="Elektronegativiteit">Elektronegativiteit</a> (<a href="/wiki/Schaal_van_Pauling" title="Schaal van Pauling">Pauling</a>) </th> <td colspan="2">0,79 </td></tr> <tr> <th><a href="/wiki/Atoomstraal" title="Atoomstraal">Atoomstraal</a> (<a href="/wiki/Picometer" title="Picometer">pm</a>) </th> <td colspan="2">265 </td></tr> <tr> <th>1e <a href="/wiki/Ionisatiepotentiaal" title="Ionisatiepotentiaal">ionisatiepotentiaal</a> (<a href="/wiki/Joule" title="Joule">kJ</a>·<a href="/wiki/Mol_(eenheid)" title="Mol (eenheid)">mol</a><sup>−1</sup>) </th> <td colspan="2">375,71 </td></tr> <tr> <th class="infobox-kop notheme" style="background-color:#cedaf2; color:inherit;" colspan="3">Fysische eigenschappen </th></tr> <tr> <th><a href="/wiki/Massadichtheid" title="Massadichtheid">Dichtheid</a> (<a href="/wiki/Kilogram" title="Kilogram">kg</a>·<a href="/wiki/Meter" title="Meter">m</a><sup>−3</sup>) </th> <td colspan="2">1873 </td></tr> <tr> <th><a href="/wiki/Hardheidsschaal_van_Mohs" title="Hardheidsschaal van Mohs">Hardheid</a> (Mohs) </th> <td colspan="2">0,2 </td></tr> <tr> <th><a href="/wiki/Smeltpunt" title="Smeltpunt">Smeltpunt</a> (<a href="/wiki/Kelvin_(eenheid)" title="Kelvin (eenheid)">K</a>) </th> <td colspan="2">301,6 </td></tr> <tr> <th><a href="/wiki/Kookpunt" title="Kookpunt">Kookpunt</a> (K) </th> <td colspan="2">944.2 </td></tr> <tr> <th><a href="/wiki/Aggregatietoestand" title="Aggregatietoestand">Aggregatietoestand</a> </th> <td colspan="2">Vast </td></tr> <tr> <th><a href="/wiki/Smeltwarmte" title="Smeltwarmte">Smeltwarmte</a> (kJ·mol<sup>−1</sup>) </th> <td colspan="2">2,092 </td></tr> <tr> <th><a href="/wiki/Verdampingswarmte" title="Verdampingswarmte">Verdampingswarmte</a> (kJ·mol<sup>−1</sup>) </th> <td colspan="2">67,74 </td></tr> <tr> <th><a href="/wiki/Kristalstructuur" title="Kristalstructuur">Kristalstructuur</a> </th> <td colspan="2">Kub </td></tr> <tr> <th><a href="/wiki/Molair_volume" title="Molair volume">Molair volume</a> (m<sup>3</sup>·mol<sup>−1</sup>) </th> <td colspan="2">70,73 · 10<sup>−6</sup> </td></tr> <tr> <th><a href="/wiki/Soortelijke_warmte" title="Soortelijke warmte">Specifieke warmte</a> (J·kg<sup>−1</sup>·K<sup>−1</sup>) </th> <td colspan="2">240 </td></tr> <tr> <th><a href="/wiki/Elektrische_weerstand_(eigenschap)" title="Elektrische weerstand (eigenschap)">Elektrische weerstand</a> (μ<a href="/wiki/Ohm_(eenheid)" title="Ohm (eenheid)">Ω</a>·<a href="/wiki/Centimeter" title="Centimeter">cm</a>) </th> <td colspan="2">20 </td></tr> <tr> <th><a href="/wiki/Warmteoverdracht" title="Warmteoverdracht">Warmtegeleiding</a> (<a href="/wiki/Watt_(eenheid)" title="Watt (eenheid)">W</a>·m<sup>−1</sup>·K<sup>−1</sup>) </th> <td colspan="2">35,9 </td></tr> <tr> <td class="ta-center" colspan="3"><small><a href="/wiki/SI-stelsel" title="SI-stelsel">SI</a>-eenheden en <a href="/wiki/Standaardomstandigheden" title="Standaardomstandigheden">standaardtemperatuur en -druk</a> worden gebruikt,<br />tenzij anders aangegeven</small> </td></tr> <tr> <td class="infobox-kop notheme center" style="background-color:#cedaf2; color:inherit;" colspan="3"> <table cellspacing="0" cellpadding="0"> <tbody><tr> <td style="vertical-align:middle;"><b>Portaal</b>  <span class="noviewer" typeof="mw:File"><a href="/wiki/Bestand:Portal.svg" class="mw-file-description" title="Portaalicoon"><img alt="Portaalicoon" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Portal.svg/22px-Portal.svg.png" decoding="async" width="22" height="20" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Portal.svg/33px-Portal.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Portal.svg/44px-Portal.svg.png 2x" data-file-width="36" data-file-height="32" /></a></span>   </td> <td class="ta-left"><b><a href="/wiki/Portaal:Scheikunde" title="Portaal:Scheikunde">Scheikunde</a> </b> </td></tr></tbody></table> </td></tr> </tbody></table> <p><b>Cesium</b> (Lat: <b>caesium</b>) is een <a href="/wiki/Scheikundig_element" class="mw-redirect" title="Scheikundig element">scheikundig element</a> met symbool <b>Cs</b> en <a href="/wiki/Atoomnummer" title="Atoomnummer">atoomnummer</a> 55. Het is een zilver/goudkleurig <a href="/wiki/Alkalimetaal" title="Alkalimetaal">alkalimetaal</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Ontdekking">Ontdekking</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesium&veaction=edit&section=1" title="Bewerk dit kopje: Ontdekking" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesium&action=edit&section=1" title="De broncode bewerken van de sectie: Ontdekking"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Cesium is als eerste spectroscopisch ontdekt door <a href="/wiki/Robert_Bunsen" title="Robert Bunsen">Robert Bunsen</a> en <a href="/wiki/Gustav_Kirchhoff" class="mw-redirect" title="Gustav Kirchhoff">Gustav Kirchhoff</a> in 1860. Het kwam in kleine hoeveelheden voor in mineraalwater uit <a href="/wiki/Bad_D%C3%BCrkheim_(stad)" title="Bad Dürkheim (stad)">Bad Dürkheim</a>, dat zij onderzochten.<sup id="cite_ref-CRC_1-0" class="reference"><a href="#cite_note-CRC-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>De naam is afkomstig van de <a href="/wiki/Latijn" title="Latijn">Latijnse</a> term <i>caesius</i>, dat als <i>hemelblauw</i> vertaald kan worden - naar de twee intense blauwe lijnen in het atomaire emissiespectrum van dit element. </p> <div class="mw-heading mw-heading2"><h2 id="Toepassingen">Toepassingen</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesium&veaction=edit&section=2" title="Bewerk dit kopje: Toepassingen" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesium&action=edit&section=2" title="De broncode bewerken van de sectie: Toepassingen"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Cesium vindt toepassing in <a href="/wiki/Foto-elektrische_cel" class="mw-redirect" title="Foto-elektrische cel">foto-elektrische cellen</a>, <a href="/wiki/Optisch_instrument" title="Optisch instrument">optische instrumenten</a>, <a href="/wiki/Scintillatieteller" class="mw-redirect" title="Scintillatieteller">scintillatietellers</a>, als <a href="/wiki/Gasbinder" title="Gasbinder">getter</a> in <a href="/wiki/Elektronenbuis" title="Elektronenbuis">elektronenbuizen</a>, in de <a href="/wiki/Glasindustrie" class="mw-redirect" title="Glasindustrie">glas</a>- en de <a href="/wiki/Keramische_industrie" title="Keramische industrie">keramische industrie</a>. </p><p>In de <a href="/wiki/Plasmafysica" title="Plasmafysica">plasmafysica</a> wordt cesium wegens de lage <a href="/wiki/Ionisatiepotentiaal" title="Ionisatiepotentiaal">ionisatiepotentiaal</a> toegepast voor het vervaardigen van sterk geïoniseerde <a href="/wiki/Plasma_(aggregatietoestand)" title="Plasma (aggregatietoestand)">plasma</a>'s. </p><p>Cesium wordt toegepast in <a href="/wiki/Atoomklok" title="Atoomklok">atoomklokken</a>. Sinds 1967 wordt de <a href="/wiki/Seconde" title="Seconde">seconde</a> in het <a href="/wiki/SI-stelsel" title="SI-stelsel">SI-stelsel</a> gedefinieerd als 9 192 631 770 cycli van de <a href="/wiki/Elektromagnetische_straling" title="Elektromagnetische straling">straling</a> die hoort bij de overgang tussen de twee <a href="/wiki/Hyperfijnstructuur" title="Hyperfijnstructuur">hyperfijnenergieniveaus</a> van de <a href="/wiki/Grondtoestand" title="Grondtoestand">grondtoestand</a> van een <a href="/wiki/Cesium-133" title="Cesium-133">cesium-133</a>-isotoop in rust bij het <a href="/wiki/Absolute_nulpunt" class="mw-redirect" title="Absolute nulpunt">absolute nulpunt</a> (= bij een temperatuur van 0 <a href="/wiki/Kelvin_(eenheid)" title="Kelvin (eenheid)">K</a>). </p> <div class="mw-heading mw-heading2"><h2 id="Opmerkelijke_eigenschappen">Opmerkelijke eigenschappen</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesium&veaction=edit&section=3" title="Bewerk dit kopje: Opmerkelijke eigenschappen" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesium&action=edit&section=3" title="De broncode bewerken van de sectie: Opmerkelijke eigenschappen"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Het metaal kan ofwel elektrochemisch ofwel door ontleding van het <a href="/wiki/Azide" title="Azide">azide</a> CsN<sub>3</sub> bereid worden, maar het moet onder een <a href="/wiki/Chemisch_inert" title="Chemisch inert">inert</a> gas, in vacuüm of onder olie bewaard worden. Het metaal zelf is bijzonder onedel. De <a href="/wiki/Elektronenconfiguratie" title="Elektronenconfiguratie">elektronenconfiguratie</a> is [Xe]6s<sup>1</sup> en het ene <a href="/wiki/Valentie-elektron" title="Valentie-elektron">valentie-elektron</a> is slechts zeer zwak aan het atoom gebonden. De eerste ionisatiepotentiaal is maar 3,893 <a href="/wiki/Elektronvolt" title="Elektronvolt">eV</a> of 375,71 kJ/mol,<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> de laagste waarde van alle stabiele elementen. Cesiumchemie wordt daarom beheerst door de sterke neiging het Cs<sup>+</sup>-ion te vormen. </p><p>In aanraking met water reageert het explosief onder vorming van <a href="/wiki/Cesiumhydroxide" title="Cesiumhydroxide">cesiumhydroxide</a> en waterstof. </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\ce {2Cs + 2H2O -> 2CsOH + H2}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> <mspace width="thinmathspace"></mspace> <mtext>Cs</mtext> <mo>+</mo> <mn>2</mn> <mspace width="thinmathspace"></mspace> <msubsup> <mtext>H</mtext> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mspace width="0pt" height="0pt" depth=".2em"></mspace> </mrow> </msubsup> <mtext>O</mtext> <mo stretchy="false">⟶</mo> <mn>2</mn> <mspace width="thinmathspace"></mspace> <mtext>CsOH</mtext> <mo>+</mo> <msubsup> <mtext>H</mtext> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mspace width="0pt" height="0pt" depth=".2em"></mspace> </mrow> </msubsup> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\ce {2Cs + 2H2O -> 2CsOH + H2}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/2cb7fcc8c5f57cbe40a9c1f2d4160ae9915d0c8b" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; width:31.568ex; height:2.843ex;" alt="{\displaystyle {\ce {2Cs + 2H2O -> 2CsOH + H2}}}" /></span></dd></dl> <p>De <a href="/wiki/Dichtheid_(natuurkunde)" class="mw-redirect" title="Dichtheid (natuurkunde)">dichtheid</a> van cesium is groter dan die van water, in tegenstelling tot <a href="/wiki/Natrium" title="Natrium">natrium</a>. Het metaal zal dan ook naar de bodem van een bekerglas water zinken. De warmte die bij deze reactie ontstaat, kan het gevormde waterstof niet aansteken, want daar is luchtzuurstof bij nodig. Het waterstof is na zijn reis door het water niet meer heet genoeg om te ontbranden. Wel zal de warmte verdeeld worden tussen water en cesium. Door het ontwikkelde waterstof kan het cesium zijn warmte niet makkelijk aan het water afstaan. Daardoor zal de druppel cesium snel heter worden. De druppel ligt, zonder water ertussen, direct op de bodem van het bekerglas. Door het temperatuurverschil tussen het glas direct onder de druppel heet cesium (ongeveer 600 °C) en het glas onder het "koude" water (maximaal 100 °C) zal de bodem van het bekerglas stuk springen. Op dat moment volgt de explosie door het contact van heet cesium, waterstof met zuurstof uit de lucht. </p><p>Het hydroxide is het actieve deel dat zorgt voor een base. De base is in staat glas te etsen. Ook met droge lucht kan het metaal reageren onder vorming van het oxide Cs<sub>2</sub>O en <a href="/wiki/Peroxide" title="Peroxide">peroxiden</a> (Cs<sub>2</sub>O<sub>2</sub>, Cs<sub>2</sub>O<sub>3</sub>). </p><p>Van alle metalen is dit het metaal dat het ideaal van een vrij elektronenmetaal met een parabolische bandstructuur het dichtste benadert. Het is zilverwit en zacht als boter. Het smelt al bij 28 °C en is dus een vloeistof op een warme dag. Aangezien verontreinigingen tot verlaging van het smeltpunt leiden, is dat voor een minder zuiver monster al bij kamertemperatuur het geval. </p><p>Het heeft met de andere <a href="/wiki/Alkalimetaal" title="Alkalimetaal">alkalimetalen</a> gemeen dat zijn zouten vrij goed oplosbaar zijn. Toch zijn er wel verschillen in de chemie van cesium en de lichtere alkalimetalen. Het feit dat een cesiumion relatief groot is, zorgt er bijvoorbeeld voor dat het chloride <a href="/wiki/Cesiumchloride" title="Cesiumchloride">CsCl</a> niet de keukenzoutstructuur heeft met octaëdrische omringing (6:6) maar een eigen structuur met een kubische omringing (8:8). Beide structuren zijn kubisch maar de eerste heeft ruimtegroep Fm3m, de laatste Pm3m. </p> <div class="mw-heading mw-heading2"><h2 id="Verschijning">Verschijning</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesium&veaction=edit&section=4" title="Bewerk dit kopje: Verschijning" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesium&action=edit&section=4" title="De broncode bewerken van de sectie: Verschijning"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Cesium is een vrij zeldzaam element dat behoort tot de <a href="/wiki/Alkalimetaal" title="Alkalimetaal">alkalimetalen</a>. Het mineraal <a href="/wiki/Polluciet" title="Polluciet">polluciet</a> is de voornaamste bron. De belangrijkste natuurlijke voorraden (2/3 van de wereldvoorraad) van dit metaal bevinden zich aan het Bernic Lake van <a href="/wiki/Manitoba" title="Manitoba">Manitoba</a> in <a href="/wiki/Canada" title="Canada">Canada</a>. Men schat dat zich daar 300.000 ton <a href="/wiki/Polluciet" title="Polluciet">polluciet</a> bevindt, dat gemiddeld uit 20% cesium bestaat.<sup id="cite_ref-CRC_1-1" class="reference"><a href="#cite_note-CRC-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> De rest zit in <a href="/wiki/Pegmatiet" title="Pegmatiet">pegmatiet</a> in <a href="/w/index.php?title=Bikita&action=edit&redlink=1" class="new" title="Bikita (de pagina bestaat niet)">Bikita</a> (Zimbabwe) met kleinere afzettingen in China, het Altajgebergte, Binnen-Mongolië en Tibet. </p> <div class="mw-heading mw-heading2"><h2 id="Isotopen">Isotopen</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesium&veaction=edit&section=5" title="Bewerk dit kopje: Isotopen" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesium&action=edit&section=5" title="De broncode bewerken van de sectie: Isotopen"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="hatnote" style="margin-bottom:0.5em; padding:0.5em 0 0.5em 1.6em; font-size:95%;" role="note"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ee/1rightarrow_blue.svg/20px-1rightarrow_blue.svg.png" decoding="async" width="15" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ee/1rightarrow_blue.svg/40px-1rightarrow_blue.svg.png 1.5x" data-file-width="480" data-file-height="480" /></span></span> <i>Zie <a href="/wiki/Isotopen_van_cesium" title="Isotopen van cesium">Isotopen van cesium</a> voor het hoofdartikel over dit onderwerp.</i></div> <table class="wikitable" style="font-size:90%;"> <tbody><tr> <th colspan="6">Stabielste isotopen </th></tr> <tr> <th><a href="/wiki/Isotoop" title="Isotoop">Iso</a> </th> <th><a href="/wiki/Relatieve_aanwezigheid" title="Relatieve aanwezigheid">RA</a> (%) </th> <th><a href="/wiki/Halveringstijd" title="Halveringstijd">Halveringstijd</a> </th> <th><a href="/wiki/Vervalvorm" class="mw-redirect" title="Vervalvorm">VV</a> </th> <th><a href="/wiki/Vervalenergie" title="Vervalenergie">VE</a> (M<a href="/wiki/Elektronvolt" title="Elektronvolt">eV</a>) </th> <th><a href="/wiki/Vervalproduct" title="Vervalproduct">VP</a> </th></tr> <tr> <td><sup>133</sup>Cs </td> <td>100 </td> <td colspan="4">stabiel met 78 neutronen </td></tr> <tr> <td><sup>134</sup>Cs </td> <td><a href="/wiki/Synthetische_radio-isotoop" title="Synthetische radio-isotoop">syn</a> </td> <td>2,0648 <a href="/wiki/Jaar" title="Jaar">j</a> </td> <td><a href="/wiki/B%C3%A8taverval" title="Bètaverval">β<sup>−</sup></a> </td> <td>2,059 </td> <td><sup>134</sup>Ba </td></tr> <tr> <td><sup>135</sup>Cs </td> <td><a href="/wiki/Synthetische_radio-isotoop" title="Synthetische radio-isotoop">syn</a> </td> <td>2,3·10<sup>6</sup> <a href="/wiki/Jaar" title="Jaar">j</a> </td> <td><a href="/wiki/B%C3%A8taverval" title="Bètaverval">β<sup>−</sup></a> </td> <td>5,400 </td> <td><sup>135</sup>Ba </td></tr> <tr> <td><a href="/wiki/Cesium-137" title="Cesium-137"><sup>137</sup>Cs</a> </td> <td><a href="/wiki/Synthetische_radio-isotoop" title="Synthetische radio-isotoop">syn</a> </td> <td>30,07 <a href="/wiki/Jaar" title="Jaar">j</a> </td> <td><a href="/wiki/B%C3%A8taverval" title="Bètaverval">β<sup>−</sup></a> </td> <td>1,176 </td> <td><sup>137</sup>Ba </td></tr></tbody></table> <p>Er zijn van cesium 34 isotopen bekend (atoommassa 112-145). Dit is meer dan van enig ander element. Echter, in de natuur komt slechts één stabiele isotoop voor: <sup>133</sup>Cs. De <a href="/wiki/Radio-isotoop" class="mw-redirect" title="Radio-isotoop">radioactieve isotoop</a> <sup>137</sup>Cs wordt gebruikt in hydrologisch onderzoek, analoog aan het gebruik van <a href="/wiki/Tritium" title="Tritium">tritium</a>. <sup>137</sup>Cs ontstaat bij nucleaire explosies en wordt ook gevormd in <a href="/wiki/Kerncentrale" title="Kerncentrale">kerncentrales</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Toxicologie_en_veiligheid">Toxicologie en veiligheid</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesium&veaction=edit&section=6" title="Bewerk dit kopje: Toxicologie en veiligheid" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesium&action=edit&section=6" title="De broncode bewerken van de sectie: Toxicologie en veiligheid"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><span><video id="mwe_player_0" poster="//upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Cesium_water.theora.ogv/260px--Cesium_water.theora.ogv.jpg" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="260" height="195" data-durationhint="15" data-mwtitle="Cesium_water.theora.ogv" data-mwprovider="wikimediacommons" resource="/wiki/Bestand: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="vp9, opus"" 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="theora, vorbis"" 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="vp9, opus"" 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="vp9, opus"" 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="vp8, vorbis"" data-transcodekey="360p.webm" data-width="480" data-height="360" /></video></span><figcaption>Toevoegen van een kleine hoeveelheid cesium aan water geeft een explosieve reactie.</figcaption></figure> <p>Cesium reageert <a href="/wiki/Explosief" title="Explosief">explosief</a> bij contact met <a href="/wiki/Water" title="Water">water</a>. Dat is voor de mens voornamelijk gevaarlijk wegens deze heftige reactie waarbij het <a href="/wiki/Corrosief" title="Corrosief">corrosieve</a> <a href="/wiki/Cesiumhydroxide" title="Cesiumhydroxide">cesiumhydroxide</a> (CsOH) wordt gevormd. </p> <div class="mw-heading mw-heading2"><h2 id="Externe_links">Externe links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Cesium&veaction=edit&section=7" title="Bewerk dit kopje: Externe links" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Cesium&action=edit&section=7" title="De broncode bewerken van de sectie: Externe links"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="interProject commons mw-list-item" style="display:none;"><a href="https://commons.wikimedia.org/wiki/Caesium" class="extiw" title="commons:Caesium">Mediabestanden</a></div> <div class="interProjectTemplate interProject-klein toccolours noprint" style="box-sizing:border-box; display:flex; gap:1em; align-items:center; font-size:85%; clear:right; float:right; margin: 0 0 1em 1em; padding:0.5em; width:270px;"> <div style="min-width:fit-content;"><span class="noviewer" typeof="mw:File"><a href="/wiki/Bestand:Commons-logo.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/40px-Commons-logo.svg.png" decoding="async" width="25" height="34" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/60px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span></div><div><a href="/wiki/Wikimedia_Commons" title="Wikimedia Commons">Commons</a> heeft mediabestanden op de pagina <i><b><a href="https://commons.wikimedia.org/wiki/Caesium" class="extiw" title="commons:Caesium">Caesium</a></b></i>.</div></div> <ul><li class="mw-empty-elt"></li> <li><a rel="nofollow" class="external text" href="http://www.lenntech.nl/periodiek/elementen/Cs.htm"><i>Lenntech.nl</i> - cesium</a></li> <li><style data-mw-deduplicate="TemplateStyles:r67679320">.mw-parser-output .taalaanduiding{font-family:sans-serif;font-size:85%;cursor:help;color:var(--color-subtle,#555)}.mw-parser-output .taalaanduiding span{border-bottom:1px dotted var(--color-subtle,#555)}</style><span class="taalaanduiding" title="Taal: Engels">(<span>en</span>) </span><a rel="nofollow" class="external text" href="http://environmentalchemistry.com/yogi/periodic/Cs.html"><i>EnvironmentalChemistry.com</i> - cesium</a></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r67679320" /><span class="taalaanduiding" title="Taal: Engels">(<span>en</span>) </span><a rel="nofollow" class="external text" href="http://www.webelements.com/webelements/elements/text/Cs/index.html"><i>WebElements.com</i> - cesium</a></li></ul> <div class="toccolours appendix" role="presentation" style="font-size:90%; margin:1em 0 -0.5em; clear:both;"> <div><span style="font-weight:bold">Bronnen, noten en/of referenties</span></div> <div class="reflist" style="list-style-type: decimal;"><div class="mw-references-wrap"><ol class="references"> <li id="cite_note-CRC-1"><span class="mw-cite-backlink">↑ <a href="#cite_ref-CRC_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-CRC_1-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><span class="citation" id="CITEREF1978_B-12"><cite><i><a rel="nofollow" class="external text" href="https://archive.org/details/crchandbookofche00clev">CRC Handbook of Chemistry and Physics</a></i></cite>, 56. CRC Press (1978), B-12. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20210507032442/https://archive.org/details/crchandbookofche00clev">Gearchiveerd</a> op <span class="mw-formatted-date" title="2021-05-07">7 mei 2021</span>.</span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text">De waarde in eV (elektronvolt) geldt voor één atoom: als een elektron een potentiaalverschil van 3,893 volt doorlopen heeft, heeft het de energie die nodig is om het eerste elektron van cesium af te halen. Door te vermenigvuldigen met het getal van Avogadro, te delen door de constante van Faraday <b>en</b> de omrekeningsfactor tussen eV en kJ wordt de tweede waarde verkregen.</span> </li> </ol></div></div> </div> <div class="interProject commons mw-list-item" style="display:none;"><a href="https://commons.wikimedia.org/wiki/Category:Caesium#mw-subcategories" class="extiw" title="commons:Category:Caesium">Mediabestanden</a></div> <div class="interProjectTemplate interProject-groot toccolours" style="display:flex; gap:1em; align-items:center; clear:both; margin:1em 0 -0.5em 0;"> <div style="min-width:max-content;"><span class="noviewer noresize" typeof="mw:File"><a href="/wiki/Bestand:Commons-logo.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/40px-Commons-logo.svg.png" decoding="async" width="25" height="34" class="mw-file-element" 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/></a></span></span></div></div> <div id="Chemische_elementen_en_isotopen" class="navigatie-titel"><a href="/wiki/Scheikunde" title="Scheikunde">Chemische</a> elementen en isotopen</div> <div class="navigatie-inhoud"> <style data-mw-deduplicate="TemplateStyles:r67785531">.mw-parser-output .navigatie-tabel{margin:0 auto 0 auto;text-align:left}.mw-parser-output .navigatie-tabel .links{text-align:right}.mw-parser-output .navigatie-tabel .rechts{padding-left:0.5em}@media screen and (max-width:640px){.mw-parser-output .navigatie-tabel tr{display:grid;grid-template-columns:1fr;width:100%;margin-bottom:0.5em}.mw-parser-output .navigatie-tabel tr:last-of-type{margin-bottom:0}.mw-parser-output .navigatie-tabel .links{text-align:unset}.mw-parser-output .navigatie-tabel .rechts{padding:unset}}</style><table class="navigatie-tabel vatop" cellpadding="0" cellspacing="0" style=""><tbody><tr><td class="links" style=""><b>Periodiek systeem:</b></td><td class="rechts"><a href="/wiki/Periodiek_systeem" title="Periodiek systeem">standaard</a> · <a href="/wiki/Periodiek_systeem/Alternatieve_tabel" title="Periodiek systeem/Alternatieve tabel">alternatief</a> · <a href="/wiki/Periodiek_systeem/Elektronenconfiguratie" title="Periodiek systeem/Elektronenconfiguratie">elektronenconfiguratie</a> · <a href="/wiki/Ezelsbruggetje#Scheikunde" title="Ezelsbruggetje">ezelsbruggetje eerste 20 elementen</a> · <a href="/wiki/Geschiedenis_van_het_periodiek_systeem" title="Geschiedenis van het periodiek systeem">geschiedenis</a></td></tr><tr><td class="links"><b>Isotopentabel:</b></td><td class="rechts"><a href="/wiki/Isotopentabel" title="Isotopentabel">op element (compleet</a> <a href="/wiki/Isotopentabel_(in_delen)" title="Isotopentabel (in delen)">/ in delen)</a> · <a href="/wiki/Isotopenkaart" title="Isotopenkaart">op atoommassa</a></td></tr><tr><td class="links"><b>Zie ook:</b></td><td class="rechts"><a href="/wiki/Lijst_van_chemische_elementen" title="Lijst van chemische elementen">lijst van 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