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class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Conteúdo" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Conteúdo</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">mover para a barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">ocultar</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Início</div> </a> </li> <li id="toc-Características_principais" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Características_principais"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Características principais</span> </div> </a> <ul id="toc-Características_principais-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Aplicações" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Aplicações"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Aplicações</span> </div> </a> <ul id="toc-Aplicações-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-História" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#História"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>História</span> </div> </a> <ul id="toc-História-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ocorrência" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ocorrência"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Ocorrência</span> </div> </a> <ul id="toc-Ocorrência-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Produção_em_Reatores_Nucleares" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Produção_em_Reatores_Nucleares"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Produção em Reatores Nucleares</span> </div> </a> <ul id="toc-Produção_em_Reatores_Nucleares-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Utilização" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Utilização"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Utilização</span> </div> </a> <ul id="toc-Utilização-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Compostos" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Compostos"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Compostos</span> </div> </a> <ul id="toc-Compostos-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Isótopos" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Isótopos"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Isótopos</span> </div> </a> <ul id="toc-Isótopos-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Precauções" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Precauções"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Precauções</span> </div> </a> <ul id="toc-Precauções-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Referências" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referências"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>Referências</span> </div> </a> <ul id="toc-Referências-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bibliografia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bibliografia"> <div class="vector-toc-text"> <span class="vector-toc-numb">11</span> <span>Bibliografia</span> </div> </a> <ul id="toc-Bibliografia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ligações_externas" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ligações_externas"> <div class="vector-toc-text"> <span class="vector-toc-numb">12</span> <span>Ligações externas</span> </div> </a> <ul id="toc-Ligações_externas-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="Conteúdo" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <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="Alternar o índice" > <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">Alternar o índice</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">Protactínio</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="Ir para um artigo noutra língua. Disponível em 133 línguas" > <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-133" 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">133 línguas</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/Protaktinium" title="Protaktinium — africanês" lang="af" hreflang="af" data-title="Protaktinium" data-language-autonym="Afrikaans" data-language-local-name="africanês" 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%8D%95%E1%88%AE%E1%89%B3%E1%8A%AD%E1%89%B2%E1%8A%92%E1%8B%A8%E1%88%9D" title="ፕሮታክቲኒየም — amárico" lang="am" hreflang="am" data-title="ፕሮታክቲኒየም" data-language-autonym="አማርኛ" data-language-local-name="amárico" 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/Protoactinio" title="Protoactinio — aragonês" lang="an" hreflang="an" data-title="Protoactinio" data-language-autonym="Aragonés" data-language-local-name="aragonês" 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%AA%E0%A5%8D%E0%A4%B0%E0%A5%8B%E0%A4%9F%E0%A5%88%E0%A4%95%E0%A5%8D%E0%A4%9F%E0%A5%80%E0%A4%A8%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="प्रोटैक्टीनियम — angika" lang="anp" hreflang="anp" data-title="प्रोटैक्टीनियम" 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%A8%D8%B1%D9%88%D8%AA%D9%83%D8%AA%D9%8A%D9%86%D9%8A%D9%88%D9%85" title="بروتكتينيوم — árabe" lang="ar" hreflang="ar" data-title="بروتكتينيوم" data-language-autonym="العربية" data-language-local-name="árabe" 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/%D9%BE%D8%B1%D9%88%D8%B7%D8%A7%D9%83%D8%AA%D9%8A%D9%86%D9%8A%D9%88%D9%85" title="پروطاكتينيوم — Moroccan Arabic" lang="ary" hreflang="ary" data-title="پروطاكتينيوم" data-language-autonym="الدارجة" data-language-local-name="Moroccan Arabic" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%A8%D8%B1%D9%88%D8%AA%D9%83%D8%AA%D9%8A%D9%86%D9%8A%D9%88%D9%85" title="بروتكتينيوم — Egyptian Arabic" lang="arz" hreflang="arz" data-title="بروتكتينيوم" data-language-autonym="مصرى" data-language-local-name="Egyptian Arabic" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Protactiniu" title="Protactiniu — asturiano" lang="ast" hreflang="ast" data-title="Protactiniu" data-language-autonym="Asturianu" data-language-local-name="asturiano" 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/Protaktinium" title="Protaktinium — azerbaijano" lang="az" hreflang="az" data-title="Protaktinium" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaijano" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-ban mw-list-item"><a href="https://ban.wikipedia.org/wiki/Protaktinium" title="Protaktinium — balinês" lang="ban" hreflang="ban" data-title="Protaktinium" data-language-autonym="Basa Bali" data-language-local-name="balinês" class="interlanguage-link-target"><span>Basa Bali</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9F%D1%80%D0%B0%D1%82%D0%B0%D0%BA%D1%82%D1%8B%D0%BD%D1%96%D0%B9" title="Пратактыній — bielorrusso" lang="be" hreflang="be" data-title="Пратактыній" data-language-autonym="Беларуская" data-language-local-name="bielorrusso" 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%9F%D1%80%D0%B0%D1%82%D0%B0%D0%BA%D1%82%D1%8B%D0%BD" title="Пратактын — Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Пратактын" 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%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D0%B9" title="Протактиний — búlgaro" lang="bg" hreflang="bg" data-title="Протактиний" data-language-autonym="Български" data-language-local-name="búlgaro" 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%AA%E0%A5%8D%E0%A4%B0%E0%A5%8B%E0%A4%9F%E0%A5%88%E0%A4%95%E0%A5%8D%E0%A4%9F%E0%A4%BF%E0%A4%A8%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="प्रोटैक्टिनियम — Bhojpuri" lang="bh" hreflang="bh" data-title="प्रोटैक्टिनियम" 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%AA%E0%A7%8D%E0%A6%B0%E0%A7%8B%E0%A6%9F%E0%A7%87%E0%A6%95%E0%A7%8D%E0%A6%9F%E0%A6%BF%E0%A6%A8%E0%A6%BF%E0%A6%AF%E0%A6%BC%E0%A6%BE%E0%A6%AE" title="প্রোটেক্টিনিয়াম — bengalês" lang="bn" hreflang="bn" data-title="প্রোটেক্টিনিয়াম" data-language-autonym="বাংলা" data-language-local-name="bengalês" 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%94%E0%BD%B4%E0%BC%8B%E0%BD%A2%E0%BD%BC%E0%BC%8B%E0%BD%8A%E0%BD%BA%E0%BD%82%E0%BC%8B%E0%BD%8A%E0%BD%B2%E0%BC%8B%E0%BD%93%E0%BD%B2%E0%BD%98%E0%BC%8D" title="པུ་རོ་ཊེག་ཊི་ནིམ། — tibetano" lang="bo" hreflang="bo" data-title="པུ་རོ་ཊེག་ཊི་ནིམ།" data-language-autonym="བོད་ཡིག" data-language-local-name="tibetano" 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/Protaktiniom" title="Protaktiniom — bretão" lang="br" hreflang="br" data-title="Protaktiniom" data-language-autonym="Brezhoneg" data-language-local-name="bretão" 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/Protaktinij" title="Protaktinij — bósnio" lang="bs" hreflang="bs" data-title="Protaktinij" data-language-autonym="Bosanski" data-language-local-name="bósnio" 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/Protoactini" title="Protoactini — catalão" lang="ca" hreflang="ca" data-title="Protoactini" data-language-autonym="Català" data-language-local-name="catalão" 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/Protactinium" title="Protactinium — Mindong" lang="cdo" hreflang="cdo" data-title="Protactinium" 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/Protactinyo" title="Protactinyo — cebuano" lang="ceb" hreflang="ceb" data-title="Protactinyo" 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/%D9%BE%D8%B1%DB%86%D8%AA%DB%95%DA%A9%D8%AA%DB%8C%D9%86%DB%8C%DB%86%D9%85" title="پرۆتەکتینیۆم — curdo central" lang="ckb" hreflang="ckb" data-title="پرۆتەکتینیۆم" data-language-autonym="کوردی" data-language-local-name="curdo central" 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/Protoattiniu" title="Protoattiniu — córsico" lang="co" hreflang="co" data-title="Protoattiniu" data-language-autonym="Corsu" data-language-local-name="córsico" 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/Protaktinium" title="Protaktinium — checo" lang="cs" hreflang="cs" data-title="Protaktinium" data-language-autonym="Čeština" data-language-local-name="checo" 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%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D0%B9" title="Протактиний — chuvash" lang="cv" hreflang="cv" data-title="Протактиний" data-language-autonym="Чӑвашла" data-language-local-name="chuvash" 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/Protactiniwm" title="Protactiniwm — galês" lang="cy" hreflang="cy" data-title="Protactiniwm" data-language-autonym="Cymraeg" data-language-local-name="galês" 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/Protactinium" title="Protactinium — dinamarquês" lang="da" hreflang="da" data-title="Protactinium" data-language-autonym="Dansk" data-language-local-name="dinamarquês" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Protactinium" title="Protactinium — alemão" lang="de" hreflang="de" data-title="Protactinium" data-language-autonym="Deutsch" data-language-local-name="alemão" 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%A0%CF%81%CF%89%CF%84%CE%B1%CE%BA%CF%84%CE%AF%CE%BD%CE%B9%CE%BF" title="Πρωτακτίνιο — grego" lang="el" hreflang="el" data-title="Πρωτακτίνιο" data-language-autonym="Ελληνικά" data-language-local-name="grego" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en badge-Q17437798 badge-goodarticle mw-list-item" title="artigo bom"><a href="https://en.wikipedia.org/wiki/Protactinium" title="Protactinium — inglês" lang="en" hreflang="en" data-title="Protactinium" data-language-autonym="English" data-language-local-name="inglês" 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/Protaktinio" title="Protaktinio — esperanto" lang="eo" hreflang="eo" data-title="Protaktinio" 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/Protactinio" title="Protactinio — espanhol" lang="es" hreflang="es" data-title="Protactinio" data-language-autonym="Español" data-language-local-name="espanhol" 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/Protaktiinium" title="Protaktiinium — estónio" lang="et" hreflang="et" data-title="Protaktiinium" data-language-autonym="Eesti" data-language-local-name="estónio" 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/Protaktinio" title="Protaktinio — basco" lang="eu" hreflang="eu" data-title="Protaktinio" data-language-autonym="Euskara" data-language-local-name="basco" 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/%D9%BE%D8%B1%D9%88%D8%AA%D8%A7%DA%A9%D8%AA%DB%8C%D9%86%DB%8C%D9%85" title="پروتاکتینیم — persa" lang="fa" hreflang="fa" data-title="پروتاکتینیم" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi badge-Q17559452 badge-recommendedarticle mw-list-item" title="artigo recomendado"><a href="https://fi.wikipedia.org/wiki/Protaktinium" title="Protaktinium — finlandês" lang="fi" hreflang="fi" data-title="Protaktinium" data-language-autonym="Suomi" data-language-local-name="finlandês" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Protactinium" title="Protactinium — francês" lang="fr" hreflang="fr" data-title="Protactinium" data-language-autonym="Français" data-language-local-name="francês" 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/Protaktiinium" title="Protaktiinium — frísio setentrional" lang="frr" hreflang="frr" data-title="Protaktiinium" data-language-autonym="Nordfriisk" data-language-local-name="frísio setentrional" 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/Protoatini" title="Protoatini — friulano" lang="fur" hreflang="fur" data-title="Protoatini" data-language-autonym="Furlan" data-language-local-name="friulano" 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/Pr%C3%B3tachtainiam" title="Prótachtainiam — irlandês" lang="ga" hreflang="ga" data-title="Prótachtainiam" data-language-autonym="Gaeilge" data-language-local-name="irlandês" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gd mw-list-item"><a href="https://gd.wikipedia.org/wiki/Protactinium" title="Protactinium — gaélico escocês" lang="gd" hreflang="gd" data-title="Protactinium" data-language-autonym="Gàidhlig" data-language-local-name="gaélico escocês" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Protactinio" title="Protactinio — galego" lang="gl" hreflang="gl" data-title="Protactinio" data-language-autonym="Galego" data-language-local-name="galego" 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%AA%E0%AB%8D%E0%AA%B0%E0%AB%8B%E0%AA%9F%E0%AB%87%E0%AA%95%E0%AB%8D%E0%AA%9F%E0%AA%BF%E0%AA%A8%E0%AB%80%E0%AA%AF%E0%AA%AE" title="પ્રોટેક્ટિનીયમ — guzerate" lang="gu" hreflang="gu" data-title="પ્રોટેક્ટિનીયમ" data-language-autonym="ગુજરાતી" data-language-local-name="guzerate" 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/Protaghtinnium" title="Protaghtinnium — manx" lang="gv" hreflang="gv" data-title="Protaghtinnium" 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/Protactinium" title="Protactinium — hacá" lang="hak" hreflang="hak" data-title="Protactinium" data-language-autonym="客家語 / Hak-kâ-ngî" data-language-local-name="hacá" 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%A4%D7%A8%D7%95%D7%98%D7%A7%D7%98%D7%99%D7%A0%D7%99%D7%95%D7%9D" title="פרוטקטיניום — hebraico" lang="he" hreflang="he" data-title="פרוטקטיניום" data-language-autonym="עברית" data-language-local-name="hebraico" 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%AA%E0%A5%8D%E0%A4%B0%E0%A5%8B%E0%A4%9F%E0%A5%88%E0%A4%95%E0%A5%8D%E0%A4%9F%E0%A5%80%E0%A4%A8%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="प्रोटैक्टीनियम — hindi" lang="hi" hreflang="hi" data-title="प्रोटैक्टीनियम" 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/Protactinium" title="Protactinium — Fiji Hindi" lang="hif" hreflang="hif" data-title="Protactinium" data-language-autonym="Fiji Hindi" data-language-local-name="Fiji Hindi" class="interlanguage-link-target"><span>Fiji Hindi</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Protaktinij" title="Protaktinij — croata" lang="hr" hreflang="hr" data-title="Protaktinij" data-language-autonym="Hrvatski" data-language-local-name="croata" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Protakt%C3%ADnium" title="Protaktínium — húngaro" lang="hu" hreflang="hu" data-title="Protaktínium" data-language-autonym="Magyar" data-language-local-name="húngaro" 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%8A%D6%80%D5%B8%D5%BF%D5%A1%D5%AF%D5%BF%D5%AB%D5%B6%D5%AB%D5%B8%D6%82%D5%B4" title="Պրոտակտինիում — arménio" lang="hy" hreflang="hy" data-title="Պրոտակտինիում" data-language-autonym="Հայերեն" data-language-local-name="arménio" 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/Protactinium" title="Protactinium — interlíngua" lang="ia" hreflang="ia" data-title="Protactinium" data-language-autonym="Interlingua" data-language-local-name="interlíngua" 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/Protaktinium" title="Protaktinium — indonésio" lang="id" hreflang="id" data-title="Protaktinium" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonésio" 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/Protaktinio" title="Protaktinio — ido" lang="io" hreflang="io" data-title="Protaktinio" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Protoattinio" title="Protoattinio — italiano" lang="it" hreflang="it" data-title="Protoattinio" data-language-autonym="Italiano" data-language-local-name="italiano" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%97%E3%83%AD%E3%83%88%E3%82%A2%E3%82%AF%E3%83%81%E3%83%8B%E3%82%A6%E3%83%A0" title="プロトアクチニウム — japonês" lang="ja" hreflang="ja" data-title="プロトアクチニウム" data-language-autonym="日本語" data-language-local-name="japonês" 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/jinmrproktini" title="jinmrproktini — lojban" lang="jbo" hreflang="jbo" data-title="jinmrproktini" 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/Protaktinium" title="Protaktinium — javanês" lang="jv" hreflang="jv" data-title="Protaktinium" data-language-autonym="Jawa" data-language-local-name="javanês" 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%9E%E1%83%A0%E1%83%9D%E1%83%A2%E1%83%90%E1%83%A5%E1%83%A2%E1%83%98%E1%83%9C%E1%83%98%E1%83%A3%E1%83%9B%E1%83%98" title="პროტაქტინიუმი — georgiano" lang="ka" hreflang="ka" data-title="პროტაქტინიუმი" data-language-autonym="ქართული" data-language-local-name="georgiano" 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/Pr%C9%94tak%C9%A9t%C9%A9n%C9%A9y%C9%94m" title="Prɔtakɩtɩnɩyɔm — Kabiye" lang="kbp" hreflang="kbp" data-title="Prɔtakɩtɩnɩyɔm" 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%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D0%B9" title="Протактиний — cazaque" lang="kk" hreflang="kk" data-title="Протактиний" data-language-autonym="Қазақша" data-language-local-name="cazaque" 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%AA%E0%B3%8D%E0%B2%B0%E0%B3%8A%E0%B2%9F%E0%B2%BE%E0%B2%95%E0%B3%8D%E0%B2%9F%E0%B2%BF%E0%B2%A8%E0%B2%BF%E0%B2%AF%E0%B2%AE%E0%B3%8D" title="ಪ್ರೊಟಾಕ್ಟಿನಿಯಮ್ — canarim" lang="kn" hreflang="kn" data-title="ಪ್ರೊಟಾಕ್ಟಿನಿಯಮ್" data-language-autonym="ಕನ್ನಡ" data-language-local-name="canarim" 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/%ED%94%84%EB%A1%9C%ED%8A%B8%EC%95%85%ED%8B%B0%EB%8A%84" title="프로트악티늄 — coreano" lang="ko" hreflang="ko" data-title="프로트악티늄" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-kv mw-list-item"><a href="https://kv.wikipedia.org/wiki/%D0%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D0%B9" title="Протактиний — komi" lang="kv" hreflang="kv" data-title="Протактиний" 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/Protaktiniom" title="Protaktiniom — córnico" lang="kw" hreflang="kw" data-title="Protaktiniom" data-language-autonym="Kernowek" data-language-local-name="córnico" 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%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D0%B9" title="Протактиний — quirguiz" lang="ky" hreflang="ky" data-title="Протактиний" data-language-autonym="Кыргызча" data-language-local-name="quirguiz" 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/Protactinium" title="Protactinium — latim" lang="la" hreflang="la" data-title="Protactinium" data-language-autonym="Latina" data-language-local-name="latim" 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/Protactinium" title="Protactinium — luxemburguês" lang="lb" hreflang="lb" data-title="Protactinium" data-language-autonym="Lëtzebuergesch" data-language-local-name="luxemburguês" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Protactinium" title="Protactinium — limburguês" lang="li" hreflang="li" data-title="Protactinium" data-language-autonym="Limburgs" data-language-local-name="limburguês" 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/Protoattinio" title="Protoattinio — Ligurian" lang="lij" hreflang="lij" data-title="Protoattinio" data-language-autonym="Ligure" data-language-local-name="Ligurian" class="interlanguage-link-target"><span>Ligure</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Protaktinis" title="Protaktinis — lituano" lang="lt" hreflang="lt" data-title="Protaktinis" data-language-autonym="Lietuvių" data-language-local-name="lituano" 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/Protakt%C4%ABnijs" title="Protaktīnijs — letão" lang="lv" hreflang="lv" data-title="Protaktīnijs" data-language-autonym="Latviešu" data-language-local-name="letão" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D1%83%D0%BC" title="Протактиниум — macedónio" lang="mk" hreflang="mk" data-title="Протактиниум" data-language-autonym="Македонски" data-language-local-name="macedónio" 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%AA%E0%B5%8D%E0%B4%B0%E0%B5%8A%E0%B4%9F%E0%B5%8D%E0%B4%9F%E0%B4%95%E0%B5%8D%E0%B4%B1%E0%B5%8D%E0%B4%B1%E0%B4%BF%E0%B4%A8%E0%B4%BF%E0%B4%AF%E0%B4%82" title="പ്രൊട്ടക്റ്റിനിയം — malaiala" lang="ml" hreflang="ml" data-title="പ്രൊട്ടക്റ്റിനിയം" data-language-autonym="മലയാളം" data-language-local-name="malaiala" 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%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8" title="Протактини — mongol" lang="mn" hreflang="mn" data-title="Протактини" data-language-autonym="Монгол" data-language-local-name="mongol" 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%AA%E0%A5%8D%E0%A4%B0%E0%A5%8B%E0%A4%9F%E0%A5%85%E0%A4%95%E0%A5%8D%E0%A4%9F%E0%A4%BF%E0%A4%A8%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="प्रोटॅक्टिनियम — marata" lang="mr" hreflang="mr" data-title="प्रोटॅक्टिनियम" data-language-autonym="मराठी" data-language-local-name="marata" 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%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D0%B9" title="Протактиний — Western Mari" lang="mrj" hreflang="mrj" data-title="Протактиний" data-language-autonym="Кырык мары" data-language-local-name="Western Mari" class="interlanguage-link-target"><span>Кырык мары</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Protaktinium" title="Protaktinium — malaio" lang="ms" hreflang="ms" data-title="Protaktinium" data-language-autonym="Bahasa Melayu" data-language-local-name="malaio" 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%95%E1%80%9B%E1%80%AD%E1%80%AF%E1%80%90%E1%80%80%E1%80%BA%E1%80%90%E1%80%AE%E1%80%94%E1%80%AE%E1%80%9A%E1%80%99%E1%80%BA" title="ပရိုတက်တီနီယမ် — birmanês" lang="my" hreflang="my" data-title="ပရိုတက်တီနီယမ်" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="birmanês" 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/Protactinium" title="Protactinium — baixo-alemão" lang="nds" hreflang="nds" data-title="Protactinium" data-language-autonym="Plattdüütsch" data-language-local-name="baixo-alemão" 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%AA%E0%A5%8D%E0%A4%B0%E0%A5%8B%E0%A4%9F%E0%A5%8D%E0%A4%AF%E0%A4%BE%E0%A4%95%E0%A5%8D%E0%A4%9F%E0%A4%BF%E0%A4%A8%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="प्रोट्याक्टिनियम — newari" lang="new" hreflang="new" data-title="प्रोट्याक्टिनियम" data-language-autonym="नेपाल भाषा" data-language-local-name="newari" class="interlanguage-link-target"><span>नेपाल भाषा</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Protactinium" title="Protactinium — neerlandês" lang="nl" hreflang="nl" data-title="Protactinium" data-language-autonym="Nederlands" data-language-local-name="neerlandês" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Protactinium" title="Protactinium — norueguês nynorsk" lang="nn" hreflang="nn" data-title="Protactinium" data-language-autonym="Norsk nynorsk" data-language-local-name="norueguês 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/Protactinium" title="Protactinium — norueguês bokmål" lang="nb" hreflang="nb" data-title="Protactinium" data-language-autonym="Norsk bokmål" data-language-local-name="norueguês bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Protactini" title="Protactini — occitano" lang="oc" hreflang="oc" data-title="Protactini" data-language-autonym="Occitan" data-language-local-name="occitano" 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/Protaktinii" title="Protaktinii — Livvi-Karelian" lang="olo" hreflang="olo" data-title="Protaktinii" data-language-autonym="Livvinkarjala" data-language-local-name="Livvi-Karelian" class="interlanguage-link-target"><span>Livvinkarjala</span></a></li><li class="interlanguage-link interwiki-os mw-list-item"><a href="https://os.wikipedia.org/wiki/%D0%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D0%B9" title="Протактиний — ossético" lang="os" hreflang="os" data-title="Протактиний" data-language-autonym="Ирон" data-language-local-name="ossético" class="interlanguage-link-target"><span>Ирон</span></a></li><li class="interlanguage-link interwiki-pi mw-list-item"><a href="https://pi.wikipedia.org/wiki/%E0%A4%AA%E0%A5%8D%E0%A4%B0%E0%A5%8B%E0%A4%9F%E0%A5%8D%E0%A4%AF%E0%A4%BE%E0%A4%95%E0%A5%8D%E0%A4%9F%E0%A4%BF%E0%A4%A8%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="प्रोट्याक्टिनियम — páli" lang="pi" hreflang="pi" data-title="प्रोट्याक्टिनियम" data-language-autonym="पालि" data-language-local-name="páli" 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/Protaktyn" title="Protaktyn — polaco" lang="pl" hreflang="pl" data-title="Protaktyn" data-language-autonym="Polski" data-language-local-name="polaco" 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/Protoactini" title="Protoactini — Piedmontese" lang="pms" hreflang="pms" data-title="Protoactini" data-language-autonym="Piemontèis" data-language-local-name="Piedmontese" class="interlanguage-link-target"><span>Piemontèis</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D9%BE%D8%B1%D9%88%D9%B9%DB%8C%DA%A9%D9%B9%DB%8C%D9%86%DB%8C%D9%85" title="پروٹیکٹینیم — Western Punjabi" lang="pnb" hreflang="pnb" data-title="پروٹیکٹینیم" 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/%D9%BE%D8%B1%D9%88%D9%BC%DB%90%DA%A9%D9%BC%DB%90%D9%86%D9%8A%D9%88%D9%85" title="پروټېکټېنيوم — pastó" lang="ps" hreflang="ps" data-title="پروټېکټېنيوم" data-language-autonym="پښتو" data-language-local-name="pastó" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/Purutaktinyu" title="Purutaktinyu — quíchua" lang="qu" hreflang="qu" data-title="Purutaktinyu" data-language-autonym="Runa Simi" data-language-local-name="quíchua" 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/Protactiniu" title="Protactiniu — romeno" lang="ro" hreflang="ro" data-title="Protactiniu" data-language-autonym="Română" data-language-local-name="romeno" 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/Protactiniu" title="Protactiniu — aromeno" lang="rup" hreflang="rup" data-title="Protactiniu" data-language-autonym="Armãneashti" data-language-local-name="aromeno" 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%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D0%B9" title="Протактиний — russo" lang="ru" hreflang="ru" data-title="Протактиний" data-language-autonym="Русский" data-language-local-name="russo" 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%AA%E0%A5%8D%E0%A4%B0%E0%A5%8B%E0%A4%9F%E0%A5%8D%E0%A4%AF%E0%A4%BE%E0%A4%95%E0%A5%8D%E0%A4%9F%E0%A4%BF%E0%A4%A8%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="प्रोट्याक्टिनियम — sânscrito" lang="sa" hreflang="sa" data-title="प्रोट्याक्टिनियम" data-language-autonym="संस्कृतम्" data-language-local-name="sânscrito" 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%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D1%83%D0%BC" title="Протактиниум — sakha" lang="sah" hreflang="sah" data-title="Протактиниум" data-language-autonym="Саха тыла" data-language-local-name="sakha" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sc mw-list-item"><a href="https://sc.wikipedia.org/wiki/Protoat%C3%ACniu" title="Protoatìniu — sardo" lang="sc" hreflang="sc" data-title="Protoatìniu" data-language-autonym="Sardu" data-language-local-name="sardo" 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/Protoattiniu" title="Protoattiniu — siciliano" lang="scn" hreflang="scn" data-title="Protoattiniu" data-language-autonym="Sicilianu" data-language-local-name="siciliano" 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/Protactinium" title="Protactinium — scots" lang="sco" hreflang="sco" data-title="Protactinium" data-language-autonym="Scots" data-language-local-name="scots" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sd mw-list-item"><a href="https://sd.wikipedia.org/wiki/%D9%BE%D8%B1%D9%88%D9%BD%D9%8A%DA%AA%D9%BD%D9%8A%D9%86%D9%8A%D9%85" title="پروٽيڪٽينيم — sindi" lang="sd" hreflang="sd" data-title="پروٽيڪٽينيم" data-language-autonym="سنڌي" data-language-local-name="sindi" class="interlanguage-link-target"><span>سنڌي</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Protaktinijum" title="Protaktinijum — servo-croata" lang="sh" hreflang="sh" data-title="Protaktinijum" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="servo-croata" 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/Protactinium" title="Protactinium — Simple English" lang="en-simple" hreflang="en-simple" data-title="Protactinium" 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/Protakt%C3%ADnium" title="Protaktínium — eslovaco" lang="sk" hreflang="sk" data-title="Protaktínium" data-language-autonym="Slovenčina" data-language-local-name="eslovaco" 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/Protaktinij" title="Protaktinij — esloveno" lang="sl" hreflang="sl" data-title="Protaktinij" data-language-autonym="Slovenščina" data-language-local-name="esloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Protaktini" title="Protaktini — albanês" lang="sq" hreflang="sq" data-title="Protaktini" data-language-autonym="Shqip" data-language-local-name="albanês" 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%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D1%98%D1%83%D0%BC" title="Протактинијум — sérvio" lang="sr" hreflang="sr" data-title="Протактинијум" data-language-autonym="Српски / srpski" data-language-local-name="sérvio" 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/Protaktinium" title="Protaktinium — Saterland Frisian" lang="stq" hreflang="stq" data-title="Protaktinium" data-language-autonym="Seeltersk" data-language-local-name="Saterland Frisian" class="interlanguage-link-target"><span>Seeltersk</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Protaktinium" title="Protaktinium — sueco" lang="sv" hreflang="sv" data-title="Protaktinium" data-language-autonym="Svenska" data-language-local-name="sueco" 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/Protaktini" title="Protaktini — suaíli" lang="sw" hreflang="sw" data-title="Protaktini" data-language-autonym="Kiswahili" data-language-local-name="suaíli" 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%AA%E0%AF%81%E0%AE%B0%E0%AF%8B%E0%AE%9F%E0%AE%BE%E0%AE%95%E0%AF%8D%E0%AE%9F%E0%AE%BF%E0%AE%A9%E0%AE%BF%E0%AE%AF%E0%AE%AE%E0%AF%8D" title="புரோடாக்டினியம் — tâmil" lang="ta" hreflang="ta" data-title="புரோடாக்டினியம்" data-language-autonym="தமிழ்" data-language-local-name="tâmil" 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%AA%E0%B1%8D%E0%B0%B0%E0%B1%8A%E0%B0%9F%E0%B0%BE%E0%B0%95%E0%B1%8D%E0%B0%9F%E0%B1%80%E0%B0%A8%E0%B0%BF%E0%B0%AF%E0%B0%82" title="ప్రొటాక్టీనియం — telugu" lang="te" hreflang="te" data-title="ప్రొటాక్టీనియం" 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%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D0%B9" title="Протактиний — tajique" lang="tg" hreflang="tg" data-title="Протактиний" data-language-autonym="Тоҷикӣ" data-language-local-name="tajique" 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%B9%82%E0%B8%9E%E0%B8%A3%E0%B9%81%E0%B8%97%E0%B8%81%E0%B8%97%E0%B8%B4%E0%B9%80%E0%B8%99%E0%B8%B5%E0%B8%A2%E0%B8%A1" title="โพรแทกทิเนียม — tailandês" lang="th" hreflang="th" data-title="โพรแทกทิเนียม" data-language-autonym="ไทย" data-language-local-name="tailandês" 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/Protaktinyo" title="Protaktinyo — tagalo" lang="tl" hreflang="tl" data-title="Protaktinyo" data-language-autonym="Tagalog" data-language-local-name="tagalo" 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/Protaktinyum" title="Protaktinyum — turco" lang="tr" hreflang="tr" data-title="Protaktinyum" data-language-autonym="Türkçe" data-language-local-name="turco" 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%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D0%B9" title="Протактиний — tatar" lang="tt" hreflang="tt" data-title="Протактиний" data-language-autonym="Татарча / tatarça" data-language-local-name="tatar" 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/%D9%BE%D8%B1%D9%88%D8%AA%D8%A7%D9%83%D8%AA%D9%89%D9%86%D9%89%D9%8A" title="پروتاكتىنىي — uigur" lang="ug" hreflang="ug" data-title="پروتاكتىنىي" data-language-autonym="ئۇيغۇرچە / Uyghurche" data-language-local-name="uigur" 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%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D1%96%D0%B9" title="Протактиній — ucraniano" lang="uk" hreflang="uk" data-title="Протактиній" data-language-autonym="Українська" data-language-local-name="ucraniano" 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/%D9%BE%D8%B1%D9%88%D9%B9%DB%8C%DA%A9%D9%B9%DB%8C%D9%86%DB%8C%D9%85" title="پروٹیکٹینیم — urdu" lang="ur" hreflang="ur" data-title="پروٹیکٹینیم" 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/Protaktiniy" title="Protaktiniy — usbeque" lang="uz" hreflang="uz" data-title="Protaktiniy" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="usbeque" 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/Protaktinii" title="Protaktinii — Veps" lang="vep" hreflang="vep" data-title="Protaktinii" data-language-autonym="Vepsän kel’" data-language-local-name="Veps" class="interlanguage-link-target"><span>Vepsän kel’</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Protactini" title="Protactini — vietnamita" lang="vi" hreflang="vi" data-title="Protactini" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Protactinyo" title="Protactinyo — waray" lang="war" hreflang="war" data-title="Protactinyo" 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%95%A4" title="镤 — wu" lang="wuu" hreflang="wuu" data-title="镤" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-xal mw-list-item"><a href="https://xal.wikipedia.org/wiki/%D0%9F%D1%80%D0%BE%D1%82%D0%B0%D0%BA%D1%82%D0%B8%D0%BD%D0%B8%D1%83%D0%BC" title="Протактиниум — kalmyk" lang="xal" hreflang="xal" data-title="Протактиниум" data-language-autonym="Хальмг" data-language-local-name="kalmyk" class="interlanguage-link-target"><span>Хальмг</span></a></li><li class="interlanguage-link interwiki-yo mw-list-item"><a href="https://yo.wikipedia.org/wiki/Protaktin%C3%AD%E1%BB%8D%CC%80m" title="Protaktiníọ̀m — ioruba" lang="yo" hreflang="yo" data-title="Protaktiníọ̀m" data-language-autonym="Yorùbá" data-language-local-name="ioruba" 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%95%A4" title="镤 — chinês" lang="zh" hreflang="zh" data-title="镤" data-language-autonym="中文" data-language-local-name="chinês" 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%8F%B7" title="鏷 — Literary Chinese" lang="lzh" hreflang="lzh" data-title="鏷" data-language-autonym="文言" data-language-local-name="Literary Chinese" class="interlanguage-link-target"><span>文言</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Protactinium" title="Protactinium — min nan" lang="nan" hreflang="nan" data-title="Protactinium" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="min nan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E9%8F%B7" title="鏷 — cantonês" lang="yue" hreflang="yue" data-title="鏷" data-language-autonym="粵語" data-language-local-name="cantonês" 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/UmPhacagu" title="UmPhacagu — zulu" lang="zu" hreflang="zu" data-title="UmPhacagu" data-language-autonym="IsiZulu" data-language-local-name="zulu" class="interlanguage-link-target"><span>IsiZulu</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1109#sitelinks-wikipedia" title="Editar hiperligações interlínguas" class="wbc-editpage">Editar hiperligações</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="Espaços nominais"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul 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href="/wiki/Especial:P%C3%A1ginas_afluentes/Protact%C3%ADnio" title="Lista de todas as páginas que contêm hiperligações para esta [j]" accesskey="j"><span>Páginas afluentes</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Especial:Altera%C3%A7%C3%B5es_relacionadas/Protact%C3%ADnio" rel="nofollow" title="Mudanças recentes nas páginas para as quais esta contém hiperligações [k]" accesskey="k"><span>Alterações relacionadas</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Wikipedia:Carregar_ficheiro" title="Carregar ficheiros [u]" accesskey="u"><span>Carregar ficheiro</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Especial:P%C3%A1ginas_especiais" title="Lista de páginas especiais [q]" accesskey="q"><span>Páginas especiais</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Protact%C3%ADnio&oldid=61704774" title="Hiperligação permanente para esta revisão desta 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wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Protactinium" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q1109" title="Hiperligação para o elemento do repositório de dados [g]" accesskey="g"><span>Elemento Wikidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Ferramentas de página"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Aspeto"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Aspeto</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">mover para a barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">ocultar</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Origem: Wikipédia, a enciclopédia livre.</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="pt" dir="ltr"><table class="infobox_v2" cellspacing="7" border="0" style="padding: 0.1em; width:300px;"> <tbody><tr> <th colspan="5"> <table cellpadding="1" cellspacing="0" style="text-align: center;" width="100%"> <tbody><tr class="topo" style="font-size:150%; background-color:#ff99cc;"> <td width="10%"><span typeof="mw:File"><a href="/wiki/Ficheiro:Pix.gif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/e/ed/Pix.gif" decoding="async" width="45" height="45" class="mw-file-element" data-file-width="1" data-file-height="1" /></a></span> </td> <td width="80%" style="color:black;">Protactínio </td> <td width="10%"><span typeof="mw:File"><a href="/wiki/Ficheiro:Stylised_atom_with_three_Bohr_model_orbits_and_stylised_nucleus.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Stylised_atom_with_three_Bohr_model_orbits_and_stylised_nucleus.svg/32px-Stylised_atom_with_three_Bohr_model_orbits_and_stylised_nucleus.svg.png" decoding="async" width="32" height="36" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Stylised_atom_with_three_Bohr_model_orbits_and_stylised_nucleus.svg/48px-Stylised_atom_with_three_Bohr_model_orbits_and_stylised_nucleus.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6f/Stylised_atom_with_three_Bohr_model_orbits_and_stylised_nucleus.svg/64px-Stylised_atom_with_three_Bohr_model_orbits_and_stylised_nucleus.svg.png 2x" data-file-width="530" data-file-height="600" /></a></span> </td></tr></tbody></table> </th></tr> <tr> <td colspan="2"> <table align="center" cellpadding="0" cellspacing="0" width="100%" style="background:#f9f9f9"> <tbody><tr> <td colspan="2" align="center" style="padding-bottom:0.5em;"><a href="/wiki/T%C3%B3rio" title="Tório">Tório</a> ← <b>Protactínio</b> → <a href="/wiki/Ur%C3%A2nio" title="Urânio">Urânio</a> </td></tr> <tr> <td style="height:16px; valign:middle; text-align:center;"><a href="/wiki/Praseod%C3%ADmio" title="Praseodímio">Pr</a> </td> <td align="center" rowspan="5"> <table border="0" cellpadding="0" cellspacing="1" align="center" style="border-collapse:separate;width:248px;background-color:transparent;"> <tbody><tr> <td style="padding:0;width:7px;height:9px;border:none;background-color:#a0ffa0;"><a href="/wiki/Hidrog%C3%A9nio" title="Hidrogénio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="border:none;width:7px;padding:0;background-color:transparent;"> </td> <td colspan="14" rowspan="5" style="border:none;padding:0;background-color:transparent;"><span typeof="mw:File"><a href="/wiki/Ficheiro:Tetragonal.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/15/Tetragonal.png/32px-Tetragonal.png" decoding="async" width="32" height="42" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/15/Tetragonal.png/48px-Tetragonal.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/15/Tetragonal.png/64px-Tetragonal.png 2x" data-file-width="130" data-file-height="170" /></a></span> </td> <td colspan="10" rowspan="3" style="border:none;text-align:center;padding:0;background-color:transparent;"> <table align="center" border="0" cellpadding="0" cellspacing="0" style="background-color:transparent; margin:0;"> <tbody><tr> <td style="font-size:10pt;border:none;padding:0;line-height:1em;background-color:transparent;"> <br />91</td> <td style="font-size:16pt;border:none;padding:0;line-height:1em;background-color:transparent;"><b>Pa</b></td></tr></tbody></table> </td> <td colspan="5" style="border:none;padding:0;background-color:transparent;"> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#c0ffff;"><a href="/wiki/H%C3%A9lio" title="Hélio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td></tr> <tr> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff6666;"><a href="/wiki/L%C3%ADtio" title="Lítio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffdead;"><a href="/wiki/Ber%C3%ADlio" title="Berílio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccc99;"><a href="/wiki/Boro" title="Boro"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#a0ffa0;"><a href="/wiki/Carbono" title="Carbono"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#a0ffa0;"><a href="/wiki/Azoto" title="Azoto"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#a0ffa0;"><a href="/wiki/Oxig%C3%A9nio" title="Oxigénio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffff99;"><a href="/wiki/Fl%C3%BAor" title="Flúor"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#c0ffff;"><a href="/wiki/N%C3%A9on" title="Néon"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td></tr> <tr> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff6666;"><a href="/wiki/S%C3%B3dio" title="Sódio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffdead;"><a href="/wiki/Magn%C3%A9sio" title="Magnésio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccccc;"><a href="/wiki/Alum%C3%ADnio" title="Alumínio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccc99;"><a href="/wiki/Sil%C3%ADcio" title="Silício"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#a0ffa0;"><a href="/wiki/F%C3%B3sforo" title="Fósforo"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#a0ffa0;"><a href="/wiki/Enxofre" title="Enxofre"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffff99;"><a href="/wiki/Cloro" title="Cloro"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#c0ffff;"><a href="/wiki/%C3%81rgon" title="Árgon"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td></tr> <tr> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff6666;"><a href="/wiki/Pot%C3%A1ssio" title="Potássio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffdead;"><a href="/wiki/C%C3%A1lcio" title="Cálcio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 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title="Crômio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Mangan%C3%AAs" title="Manganês"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Ferro" title="Ferro"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Cobalto" title="Cobalto"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/N%C3%ADquel" title="Níquel"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Cobre" title="Cobre"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Zinco" title="Zinco"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccccc;"><a href="/wiki/G%C3%A1lio" title="Gálio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccc99;"><a href="/wiki/Germ%C3%A2nio" title="Germânio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccc99;"><a href="/wiki/Ars%C3%AAnio" title="Arsênio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#a0ffa0;"><a href="/wiki/Sel%C3%AAnio" title="Selênio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffff99;"><a href="/wiki/Bromo" title="Bromo"><span style="float: left; width: 7px; 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title="Paládio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Prata" title="Prata"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/C%C3%A1dmio" title="Cádmio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccccc;"><a href="/wiki/%C3%8Dndio_(elemento_qu%C3%ADmico)" title="Índio (elemento químico)"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td 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style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffbfff;"><a href="/wiki/C%C3%A9rio" title="Cério"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffbfff;"><a href="/wiki/Praseod%C3%ADmio" title="Praseodímio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffbfff;"><a href="/wiki/Neod%C3%ADmio" title="Neodímio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td 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7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/%C3%93smio" title="Ósmio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Ir%C3%ADdio" title="Irídio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Platina" title="Platina"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Ouro" title="Ouro"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Merc%C3%BArio_(elemento_qu%C3%ADmico)" title="Mercúrio (elemento químico)"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccccc;"><a href="/wiki/T%C3%A1lio" title="Tálio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccccc;"><a href="/wiki/Chumbo" title="Chumbo"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccccc;"><a href="/wiki/Bismuto" title="Bismuto"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#cccc99;"><a href="/wiki/Pol%C3%B4nio" title="Polônio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffff99;"><a href="/wiki/%C3%81stato" title="Ástato"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#c0ffff;"><a href="/wiki/R%C3%A1don" title="Rádon"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td></tr> <tr> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff6666;"><a href="/wiki/Fr%C3%A2ncio" title="Frâncio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffdead;"><a href="/wiki/R%C3%A1dio_(elemento_qu%C3%ADmico)" title="Rádio (elemento químico)"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Act%C3%ADnio" title="Actínio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/T%C3%B3rio" title="Tório"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a class="mw-selflink selflink"><span style="float: left; width: 5px; height: 7px; font-size: 7px; line-height: 7px; word-spacing: 3px; cursor: pointer;border:1px solid black"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Ur%C3%A2nio" title="Urânio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Nept%C3%BAnio" title="Neptúnio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Plut%C3%B4nio" class="mw-redirect" title="Plutônio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Amer%C3%ADcio" title="Amerício"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/C%C3%BArio" title="Cúrio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Berqu%C3%A9lio" title="Berquélio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Calif%C3%B3rnio" title="Califórnio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Einst%C3%AAnio" title="Einstênio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/F%C3%A9rmio" title="Férmio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Mendel%C3%A9vio" title="Mendelévio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Nob%C3%A9lio" title="Nobélio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ff99cc;"><a href="/wiki/Laur%C3%AAncio" title="Laurêncio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Rutherf%C3%B3rdio" title="Rutherfórdio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/D%C3%BAbnio" title="Dúbnio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Seab%C3%B3rgio" title="Seabórgio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/B%C3%B3hrio" title="Bóhrio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/H%C3%A1ssio" title="Hássio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Meitn%C3%A9rio" title="Meitnério"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Darmst%C3%A1cio" class="mw-redirect" title="Darmstácio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Roentg%C3%AAnio" title="Roentgênio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#ffc0c0;"><a href="/wiki/Copern%C3%ADcio" title="Copernício"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#E8E8E8;"><a href="/wiki/Nip%C3%B3nio" class="mw-redirect" title="Nipónio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#E8E8E8;"><a href="/wiki/Fler%C3%B3vio" title="Fleróvio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#E8E8E8;"><a href="/wiki/Mosc%C3%B3vio" title="Moscóvio"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#E8E8E8;"><a href="/wiki/Liverm%C3%B3rio" title="Livermório"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#fcfecc;"><a href="/wiki/Tenesso" title="Tenesso"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td> <td style="padding:0;width:7px;height:9px;border:none;background-color:#c0ffff;"><a href="/wiki/Ogan%C3%A9sson" class="mw-redirect" title="Oganésson"><span style="float: left; width: 7px; height: 9px; font-size: 9px; line-height: 9px; word-spacing: 3px; cursor: pointer;"> </span></a> </td></tr></tbody></table> </td></tr> <tr> <td style="height:16px; valign:middle; text-align:center;">↑ </td></tr> <tr> <td style="height:16px; valign:middle; text-align:center;"><b>Pa</b> </td></tr> <tr> <td style="height:16px; valign:middle; text-align:center;">↓ </td></tr> <tr> <td style="height:16px; valign:middle; text-align:center;"> </td></tr> <tr> <td colspan="2" align="center" style="padding-top:0.5em;"><a href="/wiki/Tabela_peri%C3%B3dica" title="Tabela periódica">Tabela completa</a> • <a href="/wiki/Tabela_peri%C3%B3dica_estendida" title="Tabela periódica estendida">Tabela estendida</a> </td></tr></tbody></table> </td></tr> <tr> <th colspan="2" style="background-color:#ff99cc; text-align: center; padding: 3px; line-height: 15px;">Aparência </th></tr> <tr> <td colspan="2" style="text-align:center">branco prateado brilhante<br /> </td></tr> <tr> <th colspan="2" style="background-color:#ff99cc; text-align: center; padding: 3px; line-height: 15px;">Informações gerais </th></tr> <tr> <td width="60%"><a href="/wiki/Lista_de_elementos_qu%C3%ADmicos" title="Lista de elementos químicos">Nome</a>, <a href="/wiki/Lista_de_elementos_qu%C3%ADmicos" title="Lista de elementos químicos">símbolo</a>, <a href="/wiki/N%C3%BAmero_at%C3%B3mico" title="Número atómico">número</a> </td> <td width="40%">Protactínio, Pa, 91 </td></tr> <tr> <td><a href="/wiki/S%C3%A9rie_qu%C3%ADmica" title="Série química">Série química</a> </td> <td><a href="/wiki/Actin%C3%ADdeo" title="Actinídeo">Actinídeo</a> </td></tr> <tr> <td><a href="/wiki/Grupo_(qu%C3%ADmica)" title="Grupo (química)">Grupo</a>, <a href="/wiki/Per%C3%ADodo_(qu%C3%ADmica)" title="Período (química)">período</a>, <a href="/wiki/Bloco_da_tabela_peri%C3%B3dica" title="Bloco da tabela periódica">bloco</a> </td> <td>n/a, 7, f </td></tr> <tr> <td><a href="/wiki/Densidade" title="Densidade">Densidade</a>, <a href="/wiki/Escala_de_Mohs" title="Escala de Mohs">dureza</a> </td> <td>15370 <a href="/wiki/Quilograma_por_metro_c%C3%BAbico" title="Quilograma por metro cúbico">kg/m<sup class="exposant">3</sup></a>, <small>dureza desconhecida</small> </td></tr> <tr> <td><a href="/wiki/Registro_CAS" class="mw-redirect" title="Registro CAS">Número CAS</a> </td> <td>7440-13-3 </td></tr> <tr style="display:none;"> <td><a href="/wiki/N%C3%BAmero_EINECS" title="Número EINECS">Número EINECS</a> </td> <td> </td></tr> <tr> <th colspan="2" style="background-color:#ff99cc; text-align: center; padding: 3px; line-height: 15px;">Propriedade atómicas </th></tr> <tr> <td><a href="/wiki/Massa_at%C3%B3mica" title="Massa atómica">Massa atómica</a> </td> <td>231,03588 <a href="/wiki/Unidade_de_massa_at%C3%B3mica" class="mw-redirect" title="Unidade de massa atómica">u</a> </td></tr> <tr> <td><a href="/wiki/Raio_at%C3%B3mico" title="Raio atómico">Raio atómico</a> <small>(calculado)</small> </td> <td>163 <a href="/wiki/Pic%C3%B4metro" class="mw-redirect" title="Picômetro">pm</a> </td></tr> <tr> <td><a href="/wiki/Raio_covalente" title="Raio covalente">Raio covalente</a> </td> <td>200 <a href="/wiki/Pic%C3%B4metro" class="mw-redirect" title="Picômetro">pm</a> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Raio_de_Van_der_Waals" title="Raio de Van der Waals">Raio de Van der Waals</a> </td> <td><a href="/wiki/Pic%C3%B4metro" class="mw-redirect" title="Picômetro">pm</a> </td></tr> <tr> <td><a href="/wiki/Configura%C3%A7%C3%A3o_electr%C3%B3nica" class="mw-redirect" title="Configuração electrónica">Configuração electrónica</a> </td> <td>[<a href="/wiki/R%C3%A1don" title="Rádon">Rn</a>] 7s<sup>2</sup> 6d<sup>1</sup> 5f<sup>2</sup> </td></tr> <tr> <td><a href="/wiki/El%C3%A9tron" title="Elétron">Elétrons</a> <small>(por <a href="/wiki/N%C3%ADvel_de_energia" title="Nível de energia">nível de energia</a>)</small> </td> <td>2, 8, 18, 32, 20, 9, 2 <small>(<a href="/wiki/Ficheiro:Electron_shell_091_Protactinium.svg" title="Ficheiro:Electron shell 091 Protactinium.svg">ver imagem</a>)</small> </td></tr> <tr> <td><a href="/wiki/Estado_de_oxida%C3%A7%C3%A3o" title="Estado de oxidação">Estado(s) de oxidação</a> </td> <td>2, 3, 4, <b>5</b> </td></tr> <tr> <td><a href="/wiki/%C3%93xido" title="Óxido">Óxido</a> </td> <td><a href="/wiki/%C3%93xido#Óxidos_básicos" title="Óxido">fracamente básico</a> </td></tr> <tr> <td><a href="/wiki/Estrutura_cristalina" title="Estrutura cristalina">Estrutura cristalina</a> </td> <td><a href="/wiki/Sistema_tetragonal" class="mw-redirect" title="Sistema tetragonal">tetragonal</a> </td></tr> <tr> <th colspan="2" style="background-color:#ff99cc; text-align: center; padding: 3px; line-height: 15px;">Propriedades físicas </th></tr> <tr> <td><a href="/wiki/Estados_f%C3%ADsicos_da_mat%C3%A9ria" class="mw-redirect" title="Estados físicos da matéria">Estado da matéria</a> </td> <td><a href="/wiki/S%C3%B3lido" title="Sólido">sólido</a> </td></tr> <tr> <td><a href="/wiki/Ponto_de_fus%C3%A3o" title="Ponto de fusão">Ponto de fusão</a> </td> <td>1841 <a href="/wiki/Kelvin" title="Kelvin">K</a> </td></tr> <tr> <td><a href="/wiki/Ponto_de_ebuli%C3%A7%C3%A3o" title="Ponto de ebulição">Ponto de ebulição</a> </td> <td>4300 <a href="/wiki/Kelvin" title="Kelvin">K</a> </td></tr> <tr> <td><a href="/wiki/Calor_de_fus%C3%A3o" title="Calor de fusão">Entalpia de fusão</a> </td> <td>12,34 <a href="/wiki/Quilojoule_por_mol" title="Quilojoule por mol">kJ/mol</a> </td></tr> <tr> <td><a href="/wiki/Entalpia_de_vaporiza%C3%A7%C3%A3o" title="Entalpia de vaporização">Entalpia de vaporização</a> </td> <td>481 <a href="/wiki/Quilojoule_por_mol" title="Quilojoule por mol">kJ/mol</a> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Temperatura_cr%C3%ADtica" title="Temperatura crítica">Temperatura crítica</a> </td> <td> <a href="/wiki/Kelvin" title="Kelvin">K</a> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Press%C3%A3o_cr%C3%ADtica" title="Pressão crítica">Pressão crítica</a> </td> <td> <a href="/wiki/Pascal_(unidade)" title="Pascal (unidade)">Pa</a> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Volume_molar" title="Volume molar">Volume molar</a> </td> <td><a href="/wiki/Metro_c%C3%BAbico" title="Metro cúbico">m<sup class="exposant">3</sup></a>/<a href="/wiki/Mol" title="Mol">mol</a> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Press%C3%A3o_de_vapor" title="Pressão de vapor">Pressão de vapor</a> </td> <td> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Velocidade_do_som" title="Velocidade do som">Velocidade do som</a> </td> <td><a href="/wiki/Metro_por_segundo" title="Metro por segundo">m/s</a> a 20 <a href="/wiki/Grau_Celsius" title="Grau Celsius">°C</a> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Classe_magn%C3%A9tica" class="mw-redirect" title="Classe magnética">Classe magnética</a> </td> <td> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Susceptibilidade_magn%C3%A9tica" title="Susceptibilidade magnética">Susceptibilidade magnética</a> </td> <td> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Permeabilidade_magn%C3%A9tica" title="Permeabilidade magnética">Permeabilidade magnética</a> </td> <td> </td></tr> <tr style="display:none;"> <td><a href="/wiki/Temperatura_de_Curie" title="Temperatura de Curie">Temperatura de Curie</a> </td> <td> <a href="/wiki/Kelvin" title="Kelvin">K</a> </td></tr> <tr> <th colspan="2" style="background-color:#ff99cc; text-align: center; padding: 3px; line-height: 15px;">Diversos </th></tr> <tr> <td><a href="/wiki/Eletronegatividade" title="Eletronegatividade">Eletronegatividade</a> <small>(<a href="/wiki/Escala_de_Pauling" title="Escala de Pauling">Pauling</a>)</small> </td> <td>1,5 </td></tr> <tr> <td><a href="/wiki/Calor_espec%C3%ADfico" title="Calor específico">Calor específico</a> </td> <td>120 <a href="/wiki/Joule_por_quilograma_por_kelvin" class="mw-redirect" title="Joule por quilograma por kelvin">J/(kg·K)</a> </td></tr> <tr> <td><a href="/wiki/Condutividade_el%C3%A9trica" title="Condutividade elétrica">Condutividade elétrica</a> </td> <td>5,29·10<sup>6</sup> <a href="/wiki/Siemens_(unidade)" title="Siemens (unidade)">S</a>/m </td></tr> <tr> <td><a href="/wiki/Condutividade_t%C3%A9rmica" title="Condutividade térmica">Condutividade térmica</a> </td> <td>47 <a href="/wiki/Watt_por_metro_por_kelvin" title="Watt por metro por kelvin">W/(m·K)</a> </td></tr> <tr> <td>1.º <a href="/wiki/Potencial_de_ioniza%C3%A7%C3%A3o" title="Potencial de ionização">Potencial de ionização</a> </td> <td>568 <a href="/wiki/Quilojoule_por_mol" title="Quilojoule por mol">kJ/mol</a> </td></tr> <tr style="display:none;"> <td>2.º Potencial de ionização </td> <td>kJ/mol </td></tr> <tr style="display:none;"> <td>3.º Potencial de ionização </td> <td>kJ/mol </td></tr> <tr style="display:none;"> <td>4.º Potencial de ionização </td> <td>kJ/mol </td></tr> <tr style="display:none;"> <td>5.º Potencial de ionização </td> <td>kJ/mol </td></tr> <tr style="display:none;"> <td>6.º Potencial de ionização </td> <td>kJ/mol </td></tr> <tr style="display:none;"> <td>7.º Potencial de ionização </td> <td>kJ/mol </td></tr> <tr style="display:none;"> <td>8.º Potencial de ionização </td> <td>kJ/mol </td></tr> <tr style="display:none;"> <td>9.º Potencial de ionização </td> <td>kJ/mol </td></tr> <tr style="display:none;"> <td>10.º Potencial de ionização </td> <td>kJ/mol </td></tr> <tr> <th colspan="2" style="background-color:#ff99cc; text-align: center; padding: 3px; line-height: 15px; margin-top:none; margin-left:none; margin-right:none;">Isótopos mais estáveis </th></tr> <tr> <td colspan="2" style="padding:0px"> <table width="100%" rules="all" class="wikitable" style="text-align:center; margin-top:0; margin-bottom:0;"> <tbody><tr style="background:#f2f2f2;"> <td valign="middle" rowspan="2"><a href="/wiki/Is%C3%B3topo" title="Isótopo">iso</a> </td> <td valign="middle" rowspan="2"><a href="/wiki/Abund%C3%A2ncia_natural" title="Abundância natural">AN</a> </td> <td valign="middle" rowspan="2"><a href="/wiki/Meia-vida" title="Meia-vida">Meia-vida</a> </td> <td valign="middle" rowspan="2"><a href="/wiki/Modo_de_decaimento" class="mw-redirect" title="Modo de decaimento">MD</a> </td> <td><a href="/wiki/Energia_de_decaimento" title="Energia de decaimento">Ed</a> </td> <td valign="middle" rowspan="2"><a href="/wiki/Produto_de_decaimento" title="Produto de decaimento">PD</a> </td></tr> <tr style="background:#f2f2f2;"> <td><a href="/wiki/El%C3%A9tron-volt" title="Elétron-volt">MeV</a> </td></tr> <tr><td><sup>229</sup>Pa</td><td><a href="/wiki/Radiois%C3%B3topo_sint%C3%A9tico" title="Radioisótopo sintético">sintético</a></td><td>1,4 <a href="/wiki/Dia" title="Dia">d</a></td><td><a href="/wiki/Emiss%C3%A3o_alfa" title="Emissão alfa">α</a></td><td>5,58</td><td><sup>225</sup><a href="/wiki/Act%C3%ADnio" title="Actínio">Ac</a></td> </tr> <tr><td><sup>230</sup>Pa</td><td><a href="/wiki/Radiois%C3%B3topo_sint%C3%A9tico" title="Radioisótopo sintético">sintético</a></td><td>17,4 <a href="/wiki/Dia" title="Dia">d</a></td><td><a href="/wiki/Captura_eletr%C3%B4nica" title="Captura eletrônica">ε</a><br /><a href="/wiki/Emiss%C3%A3o_beta" title="Emissão beta">β<sup>−</sup></a></td><td>1,310<br />1,310</td><td><sup>230</sup><a href="/wiki/T%C3%B3rio" title="Tório">Th</a><br /><sup>230</sup><a href="/wiki/Ur%C3%A2nio" title="Urânio">U</a></td> </tr> <tr><td><sup>231</sup>Pa</td><td>~100%</td><td>32760 <a href="/wiki/Ano" title="Ano">a</a></td><td><a href="/wiki/Emiss%C3%A3o_alfa" title="Emissão alfa">α</a></td><td>5,149</td><td><sup>227</sup><a href="/wiki/Act%C3%ADnio" title="Actínio">Ac</a></td> </tr> <tr><td><sup>232</sup>Pa</td><td><a href="/wiki/Radiois%C3%B3topo_sint%C3%A9tico" title="Radioisótopo sintético">sintético</a></td><td>1,31 <a href="/wiki/Dia" title="Dia">d</a></td><td><a href="/wiki/Emiss%C3%A3o_beta" title="Emissão beta">β<sup>−</sup></a></td><td>0,31</td><td><sup>232</sup><a href="/wiki/Ur%C3%A2nio" title="Urânio">U</a></td> </tr> <tr><td><sup>233</sup>Pa</td><td><a href="/wiki/Radiois%C3%B3topo_sint%C3%A9tico" title="Radioisótopo sintético">sintético</a></td><td>26,967 <a href="/wiki/Dia" title="Dia">d</a></td><td><a href="/wiki/Emiss%C3%A3o_beta" title="Emissão beta">β<sup>−</sup></a></td><td>0,571</td><td><sup>233</sup><a href="/wiki/Ur%C3%A2nio" title="Urânio">U</a></td> </tr> <tr><td><sup>234<a href="/wiki/Isomeria_nuclear" title="Isomeria nuclear">m</a></sup>Pa</td><td><a href="/wiki/Radiois%C3%B3topo" title="Radioisótopo">traços</a></td><td>1,17 <a href="/wiki/Minuto" title="Minuto">min</a></td><td><a href="/wiki/Emiss%C3%A3o_beta" title="Emissão beta">β<sup>−</sup></a><br /><a href="/w/index.php?title=Transi%C3%A7%C3%A3o_isom%C3%A9rica&action=edit&redlink=1" class="new" title="Transição isomérica (página não existe)">TI</a></td><td>2,29<br />0,0694</td><td><sup>234</sup><a href="/wiki/Ur%C3%A2nio" title="Urânio">U</a><br /><sup>234</sup>Pa</td> </tr> <tr><td><sup>234</sup>Pa</td><td><a href="/wiki/Radiois%C3%B3topo" title="Radioisótopo">traços</a></td><td>6,75 <a href="/wiki/Hora" title="Hora">h</a></td><td><a href="/wiki/Emiss%C3%A3o_beta" title="Emissão beta">β<sup>−</sup></a></td><td>0,23</td><td><sup>234</sup><a href="/wiki/Ur%C3%A2nio" title="Urânio">U</a></td> </tr> </tbody></table> </td></tr> <tr> <td colspan="2" style="text-align:center; border-top: 2px #ff99cc solid; font-size: 80%;"><i>Unidades do <a href="/wiki/Sistema_Internacional_de_Unidades" title="Sistema Internacional de Unidades">SI</a> & <a href="/wiki/Condi%C3%A7%C3%B5es_Normais_de_Temperatura_e_Press%C3%A3o" class="mw-redirect" title="Condições Normais de Temperatura e Pressão">CNTP</a>, salvo indicação contrária.</i> </td></tr> <tr> <td colspan="2" style="text-align: center;"><div class="plainlinks hlist navbar mini"><ul><li class="nv-ver"><a href="/wiki/Predefini%C3%A7%C3%A3o:Elemento/infocaixa" class="mw-redirect" title="Predefinição:Elemento/infocaixa"><abbr title="Ver esta predefinição">v</abbr></a></li><li class="nv-discutir"><a href="/w/index.php?title=Predefini%C3%A7%C3%A3o_Discuss%C3%A3o:Elemento/infocaixa&action=edit&redlink=1" class="new" title="Predefinição Discussão:Elemento/infocaixa (página não existe)"><abbr title="Discutir esta predefinição">d</abbr></a></li><li class="nv-editar"><a class="external text" href="https://pt.wikipedia.org/w/index.php?title=Predefini%C3%A7%C3%A3o:Elemento/infocaixa&action=edit"><abbr title="Editar esta predefinição">e</abbr></a></li></ul></div> </td></tr></tbody></table> <p>O <b>protactínio</b> é um <a href="/wiki/Tabela_peri%C3%B3dica" title="Tabela periódica">elemento químico</a> de símbolo <b>Pa</b> e de <a href="/wiki/N%C3%BAmero_at%C3%B4mico" class="mw-redirect" title="Número atômico">número atômico</a> igual a 91 (91 <a href="/wiki/Pr%C3%B3ton" title="Próton">prótons</a> e 91 <a href="/wiki/El%C3%A9tron" title="Elétron">elétrons</a>), com <a href="/wiki/Massa_at%C3%B3mica" title="Massa atómica">massa atómica</a> aproximada de 231,0 <a href="/wiki/Unidade_de_massa_at%C3%B3mica" class="mw-redirect" title="Unidade de massa atómica">u</a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span>[</span>1<span>]</span></a></sup> À temperatura ambiente, o protactínio encontra-se no <a href="/wiki/S%C3%B3lido" title="Sólido">estado sólido</a>. Não existe atualmente nenhum uso para o protactínio fora do âmbito da pesquisa científica básica. Foi identificado pela primeira vez em <a href="/wiki/1913" title="1913">1913</a> por <a href="/wiki/Kasimir_Fajans" title="Kasimir Fajans">Kasimir Fajans</a> e <a href="/w/index.php?title=O._H._G%C3%B6hring&action=edit&redlink=1" class="new" title="O. H. Göhring (página não existe)">O. H. Göhring</a>.<sup id="cite_ref-:0_2-0" class="reference"><a href="#cite_note-:0-2"><span>[</span>2<span>]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Características_principais"><span id="Caracter.C3.ADsticas_principais"></span>Características principais</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protact%C3%ADnio&veaction=edit&section=1" title="Editar secção: Características principais" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protact%C3%ADnio&action=edit&section=1" title="Editar código-fonte da secção: Características principais"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>O protactínio é um elemento <a href="/wiki/Metal" title="Metal">metálico</a> prateado que pertence ao grupo dos <a href="/wiki/Actin%C3%ADdio" class="mw-redirect" title="Actinídio">actinídios</a>, com lustre metálico brilhante que se conserva no <a href="/wiki/Atmosfera" title="Atmosfera">ar</a> por poucas horas. Torna-se um <a href="/wiki/Supercondutividade" title="Supercondutividade">supercondutor</a> em temperaturas abaixo de 1,4 K. </p> <div class="mw-heading mw-heading2"><h2 id="Aplicações"><span id="Aplica.C3.A7.C3.B5es"></span>Aplicações</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protact%C3%ADnio&veaction=edit&section=2" title="Editar secção: Aplicações" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protact%C3%ADnio&action=edit&section=2" title="Editar código-fonte da secção: Aplicações"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Devido a sua escassez, alta <a href="/wiki/Radioatividade" title="Radioatividade">radioatividade</a> e <a href="/wiki/Toxicidade" title="Toxicidade">toxicidade</a>, não existe atualmente nenhum uso para o protactínio fora do âmbito da pesquisa científica básica </p> <div class="mw-heading mw-heading2"><h2 id="História"><span id="Hist.C3.B3ria"></span>História</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protact%C3%ADnio&veaction=edit&section=3" title="Editar secção: História" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protact%C3%ADnio&action=edit&section=3" title="Editar código-fonte da secção: História"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Em 1871, <a href="/wiki/Dmitri_Mendeleev" class="mw-redirect" title="Dmitri Mendeleev">Dmitri Mendeleev</a> <a href="/w/index.php?title=Mendeleev%27s_predicted_elements&action=edit&redlink=1" class="new" title="Mendeleev's predicted elements (página não existe)">previu</a> a existência de um elemento entre <a href="/wiki/T%C3%B3rio" title="Tório">tório</a> e <a href="/wiki/Ur%C3%A2nio" title="Urânio">urânio</a>.<sup id="cite_ref-:0_2-1" class="reference"><a href="#cite_note-:0-2"><span>[</span>2<span>]</span></a></sup> O grupo de elementos de actinídeo era desconhecido na época. Portanto, o urânio foi posicionado abaixo do <a href="/wiki/Tungst%C3%AAnio" title="Tungstênio">tungstênio</a>, e tório abaixo de zircônio, deixando o espaço abaixo de tântalo vazio e, até 1950, <a href="/wiki/Tabela_peri%C3%B3dica" title="Tabela periódica">tabelas periódicas</a> foram publicados com esta estrutura. Por muito tempo os químicos procuraram o eka-tântalo como um elemento com propriedades químicas similares ao tântalo, fazendo uma descoberta do protactínio quase impossível. O análogo mais pesado do tântalo foi posteriormente encontrado como o elemento <a href="/wiki/D%C3%BAbnio" title="Dúbnio">transurânico dubnium</a>. </p><p>O protactínio (do grego "protos", "primeiro") foi identificado pela primeira vez em <a href="/wiki/1913" title="1913">1913</a>, quando <a href="/wiki/Kasimir_Fajans" title="Kasimir Fajans">Kasimir Fajans</a> e <a href="/w/index.php?title=O._H._G%C3%B6hring&action=edit&redlink=1" class="new" title="O. H. Göhring (página não existe)">O. H. Göhring</a> encontraram o <a href="/wiki/Is%C3%B3topo" title="Isótopo">isótopo</a> de curta duração 234m-Pa, com <a href="/wiki/Meia-vida" title="Meia-vida">meia-vida</a> de aproximadamente 1,17 minutos, durante seus estudos sobre a <a href="/w/index.php?title=S%C3%A9rie_de_decaimento&action=edit&redlink=1" class="new" title="Série de decaimento (página não existe)">série de decaimento</a> do U-238. Deram ao novo elemento o nome de "Brevium" (do latim "brevis", "breve"). O nome foi mudado para "Protoactinium" ("protoactínio") em <a href="/wiki/1918" title="1918">1918</a> quando dois grupos de cientistas (<a href="/wiki/Otto_Hahn" title="Otto Hahn">Otto Hahn</a> e <a href="/wiki/Lise_Meitner" title="Lise Meitner">Lise Meitner</a>, na <a href="/wiki/Alemanha" title="Alemanha">Alemanha</a>, e <a href="/wiki/Frederick_Soddy" title="Frederick Soddy">Frederick Soddy</a> e <a href="/w/index.php?title=John_Cranston&action=edit&redlink=1" class="new" title="John Cranston (página não existe)">John Cranston</a> no <a href="/wiki/Reino_Unido" title="Reino Unido">Reino Unido</a>), independentemente, descobriram o 231-Pa.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span>[</span>3<span>]</span></a></sup> Em <a href="/wiki/1949" title="1949">1949</a>, o nome foi abreviado para "protactínio". </p><p>Em <a href="/wiki/1927" title="1927">1927</a>, <a href="/wiki/Aristid_V._Grosse" class="mw-redirect" title="Aristid V. Grosse">Aristid V. Grosse</a> preparou 2 mg de Pa<sub>2</sub>O<sub>5</sub>, do qual o protactínio foi isolado.<sup id="cite_ref-:1_4-0" class="reference"><a href="#cite_note-:1-4"><span>[</span>4<span>]</span></a></sup> Em <a href="/wiki/1934" title="1934">1934</a>, foi isolado pela primeira vez a partir de 0.1 mg de Pa<sub>2</sub>O<sub>5</sub>, primeiro convertendo o óxido em iodeto e, em seguida, decompondo o iodeto eletricamente com uso de um filamento aquecido em alto vácuo,<sup id="cite_ref-:1_4-1" class="reference"><a href="#cite_note-:1-4"><span>[</span>4<span>]</span></a></sup> conforme a reação: </p> <dl><dd>2PaI<sub>5</sub> → 2Pa + 5I<sub>2</sub>.</dd></dl> <p>É possível recuperá-lo dos <a href="/wiki/Mineral" title="Mineral">minerais</a> de urânio por extração com <a href="/wiki/Solvente" title="Solvente">solvente</a>. O PaF<sub>4</sub> obtido é <a href="/wiki/Redu%C3%A7%C3%A3o" title="Redução">reduzido</a> com <a href="/wiki/B%C3%A1rio" title="Bário">bário</a>. </p><p>Em <a href="/wiki/1961" title="1961">1961</a>, no Reino Unido, produziu-se 125 gramas de protactínio 99,9% puro, processando 60 toneladas de minérios de urânio. Esta foi a única fonte de protactínio do mundo por muitos anos seguintes </p> <div class="mw-heading mw-heading2"><h2 id="Ocorrência"><span id="Ocorr.C3.AAncia"></span>Ocorrência</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protact%C3%ADnio&veaction=edit&section=4" title="Editar secção: Ocorrência" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protact%C3%ADnio&action=edit&section=4" title="Editar código-fonte da secção: Ocorrência"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>O protactínio é um produto da fissão do <a href="/wiki/T%C3%B3rio" title="Tório">tório</a>, <a href="/wiki/Plut%C3%B4nio" class="mw-redirect" title="Plutônio">plutônio</a> e <a href="/wiki/Ur%C3%A2nio" title="Urânio">urânio</a>. É o mais raro dos elementos de ocorrência natural. </p><p>Quase todo o protactínio natural é encontrado na forma de protactínio-231. É um <a href="/wiki/Radia%C3%A7%C3%A3o_alfa" class="mw-redirect" title="Radiação alfa">emissor alfa</a> e é formado pela decadência do urânio-235, enquanto que o protactínio-234 (emissor de radiação <a href="/wiki/Radia%C3%A7%C3%A3o_beta" class="mw-redirect" title="Radiação beta">beta</a>) é produzido como resultado da degradação do <a href="/wiki/Ur%C3%A2nio-238" title="Urânio-238">urânio-238</a>. Quase todo o urânio-238 (99,8%) decai primeiro para o isômero de <sup>234m</sup>Pa. </p><p>O protactínio ocorre na <a href="/wiki/Pechblenda" class="mw-redirect" title="Pechblenda">pechblenda</a> na proporção de 1 <a href="/wiki/Parte_por_milh%C3%A3o" title="Parte por milhão">parte</a> de Pa-231 para 10 milhões de partes do minério. Os minérios do <a href="/wiki/Zaire" title="Zaire">Zaire</a> tem aproximadamente 3 <a href="/wiki/Parte_por_milh%C3%A3o" title="Parte por milhão">ppm</a>. O protactínio é um dos elementos mais raros e caros. </p> <div class="mw-heading mw-heading2"><h2 id="Produção_em_Reatores_Nucleares"><span id="Produ.C3.A7.C3.A3o_em_Reatores_Nucleares"></span>Produção em Reatores Nucleares</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protact%C3%ADnio&veaction=edit&section=5" title="Editar secção: Produção em Reatores Nucleares" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protact%C3%ADnio&action=edit&section=5" title="Editar código-fonte da secção: Produção em Reatores Nucleares"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Dois principais isótopos de protactínio, <sup>231</sup> Pa e <sup>233</sup> Pa, são produzidos a partir de tório em <a href="/wiki/Reator_nuclear" title="Reator nuclear">reatores nucleares</a>. Ambos são indesejáveis e são usualmente removidos, adicionando assim complexidade ao projeto e operação do reator. Em particular, as reações <sup>232</sup> Th via ( <i>n</i>, 2 <i>n</i> ) produzem <sup>231</sup> Th (meia-vida 25,5 horas) que rapidamente decai para <sup>231</sup> Pa. O último isótopo, embora não seja um resíduo transurânico, tem uma meia-vida longa de 32,760 anos, sendo um dos principais contribuintes para a radio toxicidade a longo prazo de combustíveis nucleares usados nas usinas.  </p><p>O protactínio-233 é formado após a captura de neutrões por <sup>232</sup> Th. Além disso, decai para urânio-233 ou capta outro nêutron e converte-se em urânio não fissível-234. <sup>233</sup> Pa tem uma meia-vida relativamente longa de 27 dias e alta seção transversal para captura de nêutrons (o chamado " veneno de nêutrons "). Assim, em vez de decrescer rapidamente para o <sup>233</sup> U útil, uma fracção significativa de <sup>233</sup> Pa converte-se em isótopos não fissíveis e consome nêutrons, degradando <a href="/w/index.php?title=Neutron_economy&action=edit&redlink=1" class="new" title="Neutron economy (página não existe)">a</a> eficiência do reactor. Para evitar isso, <sup>233</sup> Pa é extraído da zona ativa de reatores de sal fundido de tório, durante sua operação, de modo que só decai para <sup>233</sup> U. Isto é conseguido usando várias colunas de bismuto fundido com lítio dissolvido nele. Num cenário simplificado, o lítio reduz seletivamente os sais de protactínio para o metal de protactínio que é então extraído do ciclo de sal fundido. É escolhido devido ao seu baixo <a href="/w/index.php?title=Melting_point&action=edit&redlink=1" class="new" title="Melting point (página não existe)">ponto de fusão</a> (271 ° C), baixa pressão de vapor, boa solubilidade para lítio e actinídeos e imiscibilidade com fusão de halogêneos. </p> <div class="mw-heading mw-heading2"><h2 id="Utilização"><span id="Utiliza.C3.A7.C3.A3o"></span>Utilização</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protact%C3%ADnio&veaction=edit&section=6" title="Editar secção: Utilização" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protact%C3%ADnio&action=edit&section=6" title="Editar código-fonte da secção: Utilização"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Embora protactínio esteja situado na tabela periódica entre o urânio e o tório (ambos com aplicações numerosas), devido a sua escassez, radioatividade elevada e toxicidade elevada, não há atualmente nenhum uso para o protactínio fora da pesquisa científica. </p><p>O Protactínio-231 surge da decomposição de urânio-235 formada em reatores nucleares, e pela reação <sup>232</sup> Th + n → <sup>231</sup> Th + 2n e posterior decaimento beta. Uma vez pensou-se ser capaz de suportar uma reação em cadeia nuclear, que poderia, em princípio, ser usada para construir armas nucleares : o físico Walter Seifritz ( <a href="/w/index.php?title=Walter_Seifritz&action=edit&redlink=1" class="new" title="Walter Seifritz (página não existe)">de</a> ) uma vez estimou a massa crítica associada como 750 ± 180 kg. No entanto, a possibilidade de criticidade de <sup>231</sup> Pa foi descartada desde então. </p><p>Com o advento de espectrômetros de massa altamente sensíveis, uma aplicação de <sup>231</sup> Pa como um traçador em geologia e pale oceanografia tornou-se possível. Assim, a proporção de protactínio-231 para Tório-230 é usada para <a href="/wiki/Data%C3%A7%C3%A3o_radiom%C3%A9trica" title="Datação radiométrica">datação radiométrica</a> de sedimentos que têm até 175.000 anos de idade e na modelagem da formação de minerais. Em particular, a sua avaliação em sedimentos oceânicos permitiu reconstruir os movimentos dos corpos de água do Atlântico Norte durante a última <a href="/wiki/Ice_Age" title="Ice Age">Idade do Gelo</a>. Algumas das variações de datação relacionadas ao protactínio dependem da análise das concentrações relativas de vários membros de longa vida da cadeia de decaimento do urânio - urânio, tório e protactínio, por exemplo. Esses elementos possuem 6, 5 e 4 elétrons f na camada externa e, portanto, favorecem os estados de oxidação +6, +5 e +4, respectivamente, e mostram propriedades físicas e químicas diferentes. Assim, o tório e o protactínio, (exceto os compostos com urânio), são pouco solúveis em soluções aquosas e precipitam nos sedimentos; A taxa de precipitação é mais rápida para o tório do que para o protactínio. Além disso, a análise de concentração tanto para o protactínio-231 (meia-vida 32.760 anos) quanto para o tório-230 (meia-vida 75.380 anos) permite melhorar a precisão. Este método de duplo isótopo é também fracamente sensível a não homogeneidades na distribuição espacial dos isótopos e a variações na sua taxa de precipitação. </p> <div class="mw-heading mw-heading2"><h2 id="Compostos">Compostos</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protact%C3%ADnio&veaction=edit&section=7" title="Editar secção: Compostos" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protact%C3%ADnio&action=edit&section=7" title="Editar código-fonte da secção: Compostos"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Fluoreto" title="Fluoreto">Fluoretos</a>: <a href="/w/index.php?title=Fluoreto_de_protact%C3%ADnio_IV&action=edit&redlink=1" class="new" title="Fluoreto de protactínio IV (página não existe)">PaF<sub>4</sub></a> e <a href="/w/index.php?title=Fluoreto_de_protact%C3%ADnio_V&action=edit&redlink=1" class="new" title="Fluoreto de protactínio V (página não existe)">PaF<sub>5</sub></a></li> <li><a href="/wiki/Cloreto" title="Cloreto">Cloretos</a>: <a href="/w/index.php?title=Cloreto_de_protact%C3%ADnio_IV&action=edit&redlink=1" class="new" title="Cloreto de protactínio IV (página não existe)">PaCl<sub>4</sub></a> e <a href="/w/index.php?title=Cloreto_de_protact%C3%ADnio_V&action=edit&redlink=1" class="new" title="Cloreto de protactínio V (página não existe)">PaCl<sub>5</sub></a></li> <li><a href="/wiki/Brometo" title="Brometo">Brometos</a>: <a href="/w/index.php?title=Brometo_de_protact%C3%ADnio_IV&action=edit&redlink=1" class="new" title="Brometo de protactínio IV (página não existe)">PaBr<sub>4</sub></a> e <a href="/w/index.php?title=Brometo_de_protact%C3%ADnio_V&action=edit&redlink=1" class="new" title="Brometo de protactínio V (página não existe)">PaBr<sub>5</sub></a></li> <li><a href="/wiki/Iodeto" title="Iodeto">Iodetos</a>: <a href="/w/index.php?title=Iodeto_de_protact%C3%ADnio_III&action=edit&redlink=1" class="new" title="Iodeto de protactínio III (página não existe)">PaI<sub>3</sub></a>, <a href="/w/index.php?title=Iodeto_de_protact%C3%ADnio_IV&action=edit&redlink=1" class="new" title="Iodeto de protactínio IV (página não existe)">PaI<sub>4</sub></a> e <a href="/w/index.php?title=Iodeto_de_protact%C3%ADnio_V&action=edit&redlink=1" class="new" title="Iodeto de protactínio V (página não existe)">PaI<sub>5</sub></a></li> <li><a href="/wiki/%C3%93xido" title="Óxido">Óxidos</a>: <a href="/w/index.php?title=%C3%93xido_de_protact%C3%ADnio_II&action=edit&redlink=1" class="new" title="Óxido de protactínio II (página não existe)">PaO</a>, <a href="/w/index.php?title=%C3%93xido_de_protact%C3%ADnio_IV&action=edit&redlink=1" class="new" title="Óxido de protactínio IV (página não existe)">PaO<sub>2</sub></a> e <a href="/w/index.php?title=%C3%93xido_de_protact%C3%ADnio_V&action=edit&redlink=1" class="new" title="Óxido de protactínio V (página não existe)">Pa<sub>2</sub>O<sub>5</sub></a></li></ul> <p>Os halogenetos são conhecidos nos estados de oxidação de +5. </p> <table class="wikitable" style="text-align:center; font-size:100%;"> <tbody><tr> <th>Número de oxidação</th> <th>F</th> <th>Cl</th> <th>Br</th> <th>I </th></tr> <tr> <td>+5 </td> <td><a href="/w/index.php?title=Fluoreto_de_protact%C3%ADnio(V)&action=edit&redlink=1" class="new" title="Fluoreto de protactínio(V) (página não existe)">Fluoreto de protactínio(V)</a><br />PaF<sub>5</sub><br />branco </td> <td><a href="/wiki/Cloreto_de_protact%C3%ADnio(V)" title="Cloreto de protactínio(V)">Cloreto de protactínio(V)</a><br />PaCl<sub>5</sub><br />amarelo </td> <td><a href="/w/index.php?title=Brometo_de_protact%C3%ADnio(V)&action=edit&redlink=1" class="new" title="Brometo de protactínio(V) (página não existe)">Brometo de protactínio(V)</a><br />PaBr<sub>5</sub><br />vermelho </td> <td><a href="/w/index.php?title=Iodeto_de_protact%C3%ADnio(V)&action=edit&redlink=1" class="new" title="Iodeto de protactínio(V) (página não existe)">Iodeto de protactínio(V)</a><br />PaI<sub>5</sub><br />preto </td></tr></tbody></table> <div class="mw-heading mw-heading2"><h2 id="Isótopos"><span id="Is.C3.B3topos"></span>Isótopos</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protact%C3%ADnio&veaction=edit&section=8" title="Editar secção: Isótopos" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protact%C3%ADnio&action=edit&section=8" title="Editar código-fonte da secção: Isótopos"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Contém 29 <a href="/wiki/Radiois%C3%B3topo" title="Radioisótopo">radioisótopos</a> do protactínio foram identificados, sendo os mais estáveis 231-Pa com <a href="/wiki/Meia-vida" title="Meia-vida">meia-vida</a> de 32760 anos, 233-Pa com meia-vida de 26.967 dias, e 230-Pa com meia vida de 17.4 dias. Todos os demais isótopos <a href="/wiki/Radioatividade" title="Radioatividade">radioativos</a> apresentam meias-vidas abaixo de 1.6 dias, e maioria destes abaixo de 18 segundos. Este elemento apresenta 2 <a href="/w/index.php?title=Meta_estado&action=edit&redlink=1" class="new" title="Meta estado (página não existe)">meta estados</a>, 217m-Pa (t<sub>½</sub> 1.15 milisegundos) e 234m-Pa (t<sub>½</sub> 1.7 minutos). </p><p>O principal <a href="/wiki/Modo_de_decaimento" class="mw-redirect" title="Modo de decaimento">modo de decaimento</a> anterior ao isótopo mais estável, 231-Pa, é a <a href="/wiki/Emiss%C3%A3o_alfa" title="Emissão alfa">emissão alfa</a>, e o modo dos posteriores é a <a href="/wiki/Emiss%C3%A3o_beta" title="Emissão beta">emissão beta menos</a>. Os <a href="/wiki/Produto_de_decaimento" title="Produto de decaimento">produtos de decaimento</a> primários antes do 231-Pa são os isótopos do elemento Ac (<a href="/wiki/Act%C3%ADnio" title="Actínio">actínio</a> e os produtos primários após são os isótopos do elemento U (<a href="/wiki/Ur%C3%A2nio" title="Urânio">urânio</a>). </p> <div class="mw-heading mw-heading2"><h2 id="Precauções"><span id="Precau.C3.A7.C3.B5es"></span>Precauções</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protact%C3%ADnio&veaction=edit&section=9" title="Editar secção: Precauções" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protact%C3%ADnio&action=edit&section=9" title="Editar código-fonte da secção: Precauções"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>O protactínio é <a href="/wiki/Veneno" title="Veneno">tóxico</a> e altamente <a href="/wiki/Radioatividade" title="Radioatividade">radioativo</a>, portanto requer precauções de manuseio semelhantes àquelas usadas com o <a href="/wiki/Plut%C3%B4nio" class="mw-redirect" title="Plutônio">plutônio</a>. </p> <h2 id="Referências" style="cursor: help;" title="Esta seção foi configurada para não ser editável diretamente. Edite a página toda ou a seção anterior em vez disso."><span id="Refer.C3.AAncias"></span>Referências</h2> <div class="reflist" style="list-style-type: decimal;"><div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><a href="#CITEREFEmsley2003">Emsley 2003</a>, p. 349</span> </li> <li id="cite_note-:0-2"><span class="mw-cite-backlink">↑ <sup><i><b><a href="#cite_ref-:0_2-0">a</a></b></i></sup> <sup><i><b><a href="#cite_ref-:0_2-1">b</a></b></i></sup></span> <span class="reference-text"><a href="#CITEREFEmsley2003">Emsley 2003</a>, p. 347</span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text"><a href="#CITEREFEmsley2003">Emsley 2003</a>, pp. 347-348</span> </li> <li id="cite_note-:1-4"><span class="mw-cite-backlink">↑ <sup><i><b><a href="#cite_ref-:1_4-0">a</a></b></i></sup> <sup><i><b><a href="#cite_ref-:1_4-1">b</a></b></i></sup></span> <span class="reference-text"><a href="#CITEREFEmsley2003">Emsley 2003</a>, p. 348</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Bibliografia">Bibliografia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protact%C3%ADnio&veaction=edit&section=10" title="Editar secção: Bibliografia" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protact%C3%ADnio&action=edit&section=10" title="Editar código-fonte da secção: Bibliografia"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite id="CITEREFEmsley2003" class="citation book">Emsley, John (2003). <i>Nature's Building Blocks: An A-Z Guide to the Elements</i>. Oxford: Oxford University Press. <a href="/wiki/International_Standard_Book_Number" title="International Standard Book Number">ISBN</a> <a href="/wiki/Especial:Fontes_de_livros/9780198503408" title="Especial:Fontes de livros/9780198503408">9780198503408</a></cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AProtact%C3nio&rft.aufirst=John&rft.aulast=Emsley&rft.btitle=Nature%27s+Building+Blocks%3A+An+A-Z+Guide+to+the+Elements&rft.date=2003&rft.genre=book&rft.isbn=9780198503408&rft.place=Oxford&rft.pub=Oxford+University+Press&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></li></ul> <div class="mw-heading mw-heading2"><h2 id="Ligações_externas"><span id="Liga.C3.A7.C3.B5es_externas"></span>Ligações externas</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Protact%C3%ADnio&veaction=edit&section=11" title="Editar secção: Ligações externas" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Protact%C3%ADnio&action=edit&section=11" title="Editar código-fonte da secção: Ligações externas"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.webelements.com/protactinium/">«WebElements.com - Protactinium»</a> (em inglês)</cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AProtact%C3nio&rft.btitle=WebElements.com+-+Protactinium&rft.genre=unknown&rft_id=https%3A%2F%2Fwww.webelements.com%2Fprotactinium%2F&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></li> <li><cite class="citation web"><a rel="nofollow" class="external text" href="https://environmentalchemistry.com/yogi/periodic/Pa.html">«EnvironmentalChemistry.com - Protactinium»</a> (em inglês)</cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AProtact%C3nio&rft.btitle=EnvironmentalChemistry.com+-+Protactinium&rft.genre=unknown&rft_id=https%3A%2F%2Fenvironmentalchemistry.com%2Fyogi%2Fperiodic%2FPa.html&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></li> <li><cite class="citation web"><a rel="nofollow" class="external text" href="https://education.jlab.org/itselemental/ele091.html">«It's Elemental - Protactinium»</a> (em inglês)</cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AProtact%C3nio&rft.btitle=It%27s+Elemental+-+Protactinium&rft.genre=unknown&rft_id=https%3A%2F%2Feducation.jlab.org%2Fitselemental%2Fele091.html&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></li> <li><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.tabelaperiodica.org/protactinio/">«Protactínio - vídeos e imagens»</a></cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AProtact%C3nio&rft.btitle=Protact%C3nio+-+v%C3deos+e+imagens&rft.genre=unknown&rft_id=https%3A%2F%2Fwww.tabelaperiodica.org%2Fprotactinio%2F&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></li> <li><cite class="citation web"><a rel="nofollow" class="external text" href="http://pubs.acs.org/cen/80th/protactinium.html">«Chemical & Engineering News - Protactinium»</a> (em inglês)</cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AProtact%C3nio&rft.btitle=Chemical+%26+Engineering+News+-+Protactinium&rft.genre=unknown&rft_id=http%3A%2F%2Fpubs.acs.org%2Fcen%2F80th%2Fprotactinium.html&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></li> <li><cite class="citation web"><a rel="nofollow" class="external text" href="http://nautilus.fis.uc.pt/st2.5/scenes-p/elem/e09100.html">«Protactínio»</a></cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AProtact%C3nio&rft.btitle=Protact%C3nio&rft.genre=unknown&rft_id=http%3A%2F%2Fnautilus.fis.uc.pt%2Fst2.5%2Fscenes-p%2Felem%2Fe09100.html&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></li> <li><a href="//doi.org/10.1107/S0365110X59002031" class="extiw" title="doi:10.1107/S0365110X59002031">Donohue, J. (1959). "On the crystal structure of protactinium metal". <i>Acta Crystallographica</i></a> (em inglês)</li></ul> <p><br /> </p> <div role="navigation" class="navbox" aria-labelledby="Tabela_periódica" style="padding:3px"><table class="nowraplinks collapsible expanded navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div class="plainlinks hlist navbar mini"><ul><li class="nv-ver"><a href="/wiki/Predefini%C3%A7%C3%A3o:Tabela_peri%C3%B3dica_compacta" title="Predefinição:Tabela periódica compacta"><abbr title="Ver esta predefinição" style=";;background:none transparent;border:none;-moz-box-shadow:none;-webkit-box-shadow:none;box-shadow:none; padding:0;">v</abbr></a></li><li class="nv-discutir"><a href="/wiki/Predefini%C3%A7%C3%A3o_Discuss%C3%A3o:Tabela_peri%C3%B3dica_compacta" title="Predefinição Discussão:Tabela periódica compacta"><abbr title="Discutir esta predefinição" style=";;background:none transparent;border:none;-moz-box-shadow:none;-webkit-box-shadow:none;box-shadow:none; 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font-weight:normal;"><a href="/wiki/Metal_alcalino" title="Metal alcalino">1</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Metal_alcalinoterroso" title="Metal alcalinoterroso">2</a> </th> <td colspan="14"> </td> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Elementos_do_Grupo_3" title="Elementos do Grupo 3">3</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Elementos_do_Grupo_4" title="Elementos do Grupo 4">4</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Elementos_do_Grupo_5" title="Elementos do Grupo 5">5</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Elementos_do_Grupo_6" title="Elementos do Grupo 6">6</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Elementos_do_Grupo_7" title="Elementos do Grupo 7">7</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Elementos_do_Grupo_8" title="Elementos do Grupo 8">8</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Elementos_do_Grupo_9" title="Elementos do Grupo 9">9</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Elementos_do_Grupo_10" title="Elementos do Grupo 10">10</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Elementos_do_Grupo_11" title="Elementos do Grupo 11">11</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Elementos_do_Grupo_12" title="Elementos do Grupo 12">12</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Grupo_do_boro" title="Grupo do boro">13</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Grupo_do_carbono" title="Grupo do carbono">14</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Grupo_do_nitrog%C3%AAnio" title="Grupo do nitrogênio">15</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Calcog%C3%AAnio" title="Calcogênio">16</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/Halog%C3%AAnio" title="Halogênio">17</a> </th> <th scope="col" style="background:transparent; font-weight:normal;"><a href="/wiki/G%C3%A1s_nobre" title="Gás nobre">18</a> </th></tr> <tr> <th scope="row" style="background:transparent; font-weight:normal;"><a href="/wiki/Per%C3%ADodo_1_(qu%C3%ADmica)" title="Período 1 (química)">1</a> </th> <td title="Hidrogénio, 1 (diatomic nonmetal)" style="text-align:center; background:#e7ff8f; border:none; ;"><a href="/wiki/Hidrog%C3%A9nio" title="Hidrogénio"><span style="display:block">H</span></a> </td> <td colspan="30"> </td> <td title="Hélio, 2 (noble gas)" style="text-align:center; background:#c0ffff; border:none; ;"><a href="/wiki/H%C3%A9lio" title="Hélio"><span style="display:block">He</span></a> </td></tr> <tr> <th scope="row" style="background:transparent; font-weight:normal;"><a href="/wiki/Per%C3%ADodo_2_(qu%C3%ADmica)" title="Período 2 (química)">2</a> </th> <td title="Lítio, 3 (alkali metal)" style="text-align:center; background:#ff6666; border:none; ;"><a href="/wiki/L%C3%ADtio" title="Lítio"><span style="display:block">Li</span></a> </td> <td title="Berílio, 4 (alkaline earth metal)" style="text-align:center; background:#ffdead; border:none; ;"><a href="/wiki/Ber%C3%ADlio" title="Berílio"><span style="display:block">Be</span></a> </td> <td colspan="24"> </td> <td title="Boro, 5 (metalloid)" style="text-align:center; background:#cccc99; border:none; ;"><a href="/wiki/Boro" title="Boro"><span style="display:block">B</span></a> </td> <td title="Carbono, 6 (polyatomic nonmetal)" style="text-align:center; background:#a1ffc3; border:none; ;"><a href="/wiki/Carbono" title="Carbono"><span style="display:block">C</span></a> </td> <td title="Azoto, 7 (diatomic nonmetal)" style="text-align:center; background:#e7ff8f; border:none; ;"><a href="/wiki/Azoto" title="Azoto"><span style="display:block">N</span></a> </td> <td title="Oxigénio, 8 (diatomic nonmetal)" style="text-align:center; background:#e7ff8f; border:none; ;"><a href="/wiki/Oxig%C3%A9nio" title="Oxigénio"><span style="display:block">O</span></a> </td> <td title="Flúor, 9 (diatomic nonmetal)" style="text-align:center; background:#e7ff8f; border:none; ;"><a href="/wiki/Fl%C3%BAor" title="Flúor"><span style="display:block">F</span></a> </td> <td title="Néon, 10 (noble gas)" style="text-align:center; background:#c0ffff; border:none; ;"><a href="/wiki/N%C3%A9on" title="Néon"><span style="display:block">Ne</span></a> </td></tr> <tr> <th scope="row" style="background:transparent; font-weight:normal;"><a href="/w/index.php?title=Per%C3%ADodo_3_(qu%C3%ADmica)&action=edit&redlink=1" class="new" title="Período 3 (química) (página não existe)">3</a> </th> <td title="Sódio, 11 (alkali metal)" style="text-align:center; background:#ff6666; border:none; ;"><a href="/wiki/S%C3%B3dio" title="Sódio"><span style="display:block">Na</span></a> </td> <td title="Magnésio, 12 (alkaline earth metal)" style="text-align:center; background:#ffdead; border:none; ;"><a href="/wiki/Magn%C3%A9sio" title="Magnésio"><span style="display:block">Mg</span></a> </td> <td colspan="24"> </td> <td title="Alumínio, 13 (post-transition metal)" style="text-align:center; background:#cccccc; border:none; ;"><a href="/wiki/Alum%C3%ADnio" title="Alumínio"><span style="display:block">Al</span></a> </td> <td title="Silício, 14 (metalloid)" style="text-align:center; background:#cccc99; border:none; ;"><a href="/wiki/Sil%C3%ADcio" title="Silício"><span style="display:block">Si</span></a> </td> <td title="Fósforo, 15 (polyatomic nonmetal)" style="text-align:center; background:#a1ffc3; border:none; ;"><a href="/wiki/F%C3%B3sforo" title="Fósforo"><span style="display:block">P</span></a> </td> <td title="Enxofre, 16 (polyatomic nonmetal)" style="text-align:center; background:#a1ffc3; border:none; ;"><a href="/wiki/Enxofre" title="Enxofre"><span style="display:block">S</span></a> </td> <td title="Cloro, 17 (diatomic nonmetal)" style="text-align:center; background:#e7ff8f; border:none; ;"><a href="/wiki/Cloro" title="Cloro"><span style="display:block">Cl</span></a> </td> <td title="Árgon, 18 (noble gas)" style="text-align:center; background:#c0ffff; border:none; ;"><a href="/wiki/%C3%81rgon" title="Árgon"><span style="display:block">Ar</span></a> </td></tr> <tr> <th scope="row" style="background:transparent; font-weight:normal;"><a href="/w/index.php?title=Per%C3%ADodo_4_(qu%C3%ADmica)&action=edit&redlink=1" class="new" title="Período 4 (química) (página não existe)">4</a> </th> <td title="Potássio, 19 (alkali metal)" style="text-align:center; background:#ff6666; border:none; ;"><a href="/wiki/Pot%C3%A1ssio" title="Potássio"><span style="display:block">K</span></a> </td> <td title="Cálcio, 20 (alkaline earth metal)" style="text-align:center; background:#ffdead; border:none; ;"><a href="/wiki/C%C3%A1lcio" title="Cálcio"><span style="display:block">Ca</span></a> </td> <td colspan="14"> </td> <td title="Escândio, 21 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Esc%C3%A2ndio" title="Escândio"><span style="display:block">Sc</span></a> </td> <td title="Titânio, 22 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Tit%C3%A2nio" title="Titânio"><span style="display:block">Ti</span></a> </td> <td title="Vanádio, 23 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Van%C3%A1dio" title="Vanádio"><span style="display:block">V</span></a> </td> <td title="Crômio, 24 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Cr%C3%B4mio" class="mw-redirect" title="Crômio"><span style="display:block">Cr</span></a> </td> <td title="Manganês, 25 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Mangan%C3%AAs" title="Manganês"><span style="display:block">Mn</span></a> </td> <td title="Ferro, 26 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Ferro" title="Ferro"><span style="display:block">Fe</span></a> </td> <td title="Cobalto, 27 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Cobalto" title="Cobalto"><span style="display:block">Co</span></a> </td> <td title="Níquel, 28 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/N%C3%ADquel" title="Níquel"><span style="display:block">Ni</span></a> </td> <td title="Cobre, 29 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Cobre" title="Cobre"><span style="display:block">Cu</span></a> </td> <td title="Zinco, 30 (post-transition metal)" style="text-align:center; background:#cccccc; border:none; ;"><a href="/wiki/Zinco" title="Zinco"><span style="display:block">Zn</span></a> </td> <td title="Gálio, 31 (post-transition metal)" style="text-align:center; background:#cccccc; border:none; ;"><a href="/wiki/G%C3%A1lio" title="Gálio"><span style="display:block">Ga</span></a> </td> <td title="Germânio, 32 (metalloid)" style="text-align:center; background:#cccc99; border:none; ;"><a href="/wiki/Germ%C3%A2nio" title="Germânio"><span style="display:block">Ge</span></a> </td> <td title="Arsênio, 33 (metalloid)" style="text-align:center; background:#cccc99; border:none; ;"><a href="/wiki/Ars%C3%AAnio" title="Arsênio"><span style="display:block">As</span></a> </td> <td title="Selênio, 34 (polyatomic nonmetal)" style="text-align:center; background:#a1ffc3; border:none; ;"><a href="/wiki/Sel%C3%AAnio" title="Selênio"><span style="display:block">Se</span></a> </td> <td title="Bromo, 35 (diatomic nonmetal)" style="text-align:center; background:#e7ff8f; border:none; ;"><a href="/wiki/Bromo" title="Bromo"><span style="display:block">Br</span></a> </td> <td title="Crípton, 36 (noble gas)" style="text-align:center; background:#c0ffff; border:none; ;"><a href="/wiki/Cr%C3%ADpton" title="Crípton"><span style="display:block">Kr</span></a> </td></tr> <tr> <th scope="row" style="background:transparent; font-weight:normal;"><a href="/w/index.php?title=Per%C3%ADodo_5_(qu%C3%ADmica)&action=edit&redlink=1" class="new" title="Período 5 (química) (página não existe)">5</a> </th> <td title="Rubídio, 37 (alkali metal)" style="text-align:center; background:#ff6666; border:none; ;"><a href="/wiki/Rub%C3%ADdio" title="Rubídio"><span style="display:block">Rb</span></a> </td> <td title="Estrôncio, 38 (alkaline earth metal)" style="text-align:center; background:#ffdead; border:none; ;"><a href="/wiki/Estr%C3%B4ncio" title="Estrôncio"><span style="display:block">Sr</span></a> </td> <td colspan="14"> </td> <td title="Ítrio, 39 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/%C3%8Dtrio" title="Ítrio"><span style="display:block">Y</span></a> </td> <td title="Zircônio, 40 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Zirc%C3%B4nio" title="Zircônio"><span style="display:block">Zr</span></a> </td> <td title="Nióbio, 41 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Ni%C3%B3bio" title="Nióbio"><span style="display:block">Nb</span></a> </td> <td title="Molibdênio, 42 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Molibd%C3%AAnio" title="Molibdênio"><span style="display:block">Mo</span></a> </td> <td title="Tecnécio, 43 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Tecn%C3%A9cio" title="Tecnécio"><span style="display:block">Tc</span></a> </td> <td title="Rutênio, 44 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Rut%C3%AAnio" title="Rutênio"><span style="display:block">Ru</span></a> </td> <td title="Ródio, 45 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/R%C3%B3dio" title="Ródio"><span style="display:block">Rh</span></a> </td> <td title="Paládio, 46 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Pal%C3%A1dio" title="Paládio"><span style="display:block">Pd</span></a> </td> <td title="Prata, 47 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Prata" title="Prata"><span style="display:block">Ag</span></a> </td> <td title="Cádmio, 48 (post-transition metal)" style="text-align:center; background:#cccccc; border:none; ;"><a href="/wiki/C%C3%A1dmio" title="Cádmio"><span style="display:block">Cd</span></a> </td> <td title="Índio (elemento químico), 49 (post-transition metal)" style="text-align:center; background:#cccccc; border:none; ;"><a href="/wiki/%C3%8Dndio_(elemento_qu%C3%ADmico)" title="Índio (elemento químico)"><span style="display:block">In</span></a> </td> <td title="Estanho, 50 (post-transition metal)" style="text-align:center; background:#cccccc; border:none; ;"><a href="/wiki/Estanho" title="Estanho"><span style="display:block">Sn</span></a> </td> <td title="Antimônio, 51 (metalloid)" style="text-align:center; background:#cccc99; border:none; ;"><a href="/wiki/Antim%C3%B4nio" title="Antimônio"><span style="display:block">Sb</span></a> </td> <td title="Telúrio, 52 (metalloid)" style="text-align:center; background:#cccc99; border:none; ;"><a href="/wiki/Tel%C3%BArio" title="Telúrio"><span style="display:block">Te</span></a> </td> <td title="Iodo, 53 (diatomic nonmetal)" style="text-align:center; background:#e7ff8f; border:none; ;"><a href="/wiki/Iodo" title="Iodo"><span style="display:block">I</span></a> </td> <td title="Xenônio, 54 (noble gas)" style="text-align:center; background:#c0ffff; border:none; ;"><a href="/wiki/Xen%C3%B4nio" title="Xenônio"><span style="display:block">Xe</span></a> </td></tr> <tr> <th scope="row" style="background:transparent; font-weight:normal;"><a href="/w/index.php?title=Per%C3%ADodo_6_(qu%C3%ADmica)&action=edit&redlink=1" class="new" title="Período 6 (química) (página não existe)">6</a> </th> <td title="Césio, 55 (alkali metal)" style="text-align:center; background:#ff6666; border:none; ;"><a href="/wiki/C%C3%A9sio" title="Césio"><span style="display:block">Cs</span></a> </td> <td title="Bário, 56 (alkaline earth metal)" style="text-align:center; background:#ffdead; border:none; ;"><a href="/wiki/B%C3%A1rio" title="Bário"><span style="display:block">Ba</span></a> </td> <td title="Lantânio, 57 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/Lant%C3%A2nio" title="Lantânio"><span style="display:block">La</span></a> </td> <td title="Cério, 58 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/C%C3%A9rio" title="Cério"><span style="display:block">Ce</span></a> </td> <td title="Praseodímio, 59 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/Praseod%C3%ADmio" title="Praseodímio"><span style="display:block">Pr</span></a> </td> <td title="Neodímio, 60 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/Neod%C3%ADmio" title="Neodímio"><span style="display:block">Nd</span></a> </td> <td title="Promécio, 61 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/Prom%C3%A9cio" title="Promécio"><span style="display:block">Pm</span></a> </td> <td title="Samário, 62 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/Sam%C3%A1rio" title="Samário"><span style="display:block">Sm</span></a> </td> <td title="Európio, 63 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/Eur%C3%B3pio" title="Európio"><span style="display:block">Eu</span></a> </td> <td title="Gadolínio, 64 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/Gadol%C3%ADnio" title="Gadolínio"><span style="display:block">Gd</span></a> </td> <td title="Térbio, 65 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/T%C3%A9rbio" title="Térbio"><span style="display:block">Tb</span></a> </td> <td title="Disprósio, 66 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/Dispr%C3%B3sio" title="Disprósio"><span style="display:block">Dy</span></a> </td> <td title="Hólmio, 67 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/H%C3%B3lmio" title="Hólmio"><span style="display:block">Ho</span></a> </td> <td title="Érbio, 68 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/%C3%89rbio" title="Érbio"><span style="display:block">Er</span></a> </td> <td title="Túlio, 69 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/T%C3%BAlio" title="Túlio"><span style="display:block">Tm</span></a> </td> <td title="Itérbio, 70 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/It%C3%A9rbio" title="Itérbio"><span style="display:block">Yb</span></a> </td> <td title="Lutécio, 71 (lanthanide)" style="text-align:center; background:#ffbfff; border:none; ;"><a href="/wiki/Lut%C3%A9cio" title="Lutécio"><span style="display:block">Lu</span></a> </td> <td title="Háfnio, 72 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/H%C3%A1fnio" title="Háfnio"><span style="display:block">Hf</span></a> </td> <td title="Tântalo (elemento químico), 73 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/T%C3%A2ntalo_(elemento_qu%C3%ADmico)" title="Tântalo (elemento químico)"><span style="display:block">Ta</span></a> </td> <td title="Tungstênio, 74 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Tungst%C3%AAnio" title="Tungstênio"><span style="display:block">W</span></a> </td> <td title="Rênio, 75 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/R%C3%AAnio" title="Rênio"><span style="display:block">Re</span></a> </td> <td title="Ósmio, 76 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/%C3%93smio" title="Ósmio"><span style="display:block">Os</span></a> </td> <td title="Irídio, 77 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Ir%C3%ADdio" title="Irídio"><span style="display:block">Ir</span></a> </td> <td title="Platina, 78 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Platina" title="Platina"><span style="display:block">Pt</span></a> </td> <td title="Ouro, 79 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Ouro" title="Ouro"><span style="display:block">Au</span></a> </td> <td title="Mercúrio (elemento químico), 80 (post-transition metal)" style="text-align:center; background:#cccccc; border:none; ;"><a href="/wiki/Merc%C3%BArio_(elemento_qu%C3%ADmico)" title="Mercúrio (elemento químico)"><span style="display:block">Hg</span></a> </td> <td title="Tálio, 81 (post-transition metal)" style="text-align:center; background:#cccccc; border:none; ;"><a href="/wiki/T%C3%A1lio" title="Tálio"><span style="display:block">Tl</span></a> </td> <td title="Chumbo, 82 (post-transition metal)" style="text-align:center; background:#cccccc; border:none; ;"><a href="/wiki/Chumbo" title="Chumbo"><span style="display:block">Pb</span></a> </td> <td title="Bismuto, 83 (post-transition metal)" style="text-align:center; background:#cccccc; border:none; ;"><a href="/wiki/Bismuto" title="Bismuto"><span style="display:block">Bi</span></a> </td> <td title="Polônio, 84 (post-transition metal)" style="text-align:center; background:#cccccc; border:none; ;"><a href="/wiki/Pol%C3%B4nio" title="Polônio"><span style="display:block">Po</span></a> </td> <td title="Ástato, 85 (metalloid)" style="text-align:center; background:#cccc99; border:none; ;"><a href="/wiki/%C3%81stato" title="Ástato"><span style="display:block">At</span></a> </td> <td title="Rádon, 86 (noble gas)" style="text-align:center; background:#c0ffff; border:none; ;"><a href="/wiki/R%C3%A1don" title="Rádon"><span style="display:block">Rn</span></a> </td></tr> <tr> <th scope="row" style="background:transparent; font-weight:normal;"><a href="/w/index.php?title=Per%C3%ADodo_7_(qu%C3%ADmica)&action=edit&redlink=1" class="new" title="Período 7 (química) (página não existe)">7</a> </th> <td title="Frâncio, 87 (alkali metal)" style="text-align:center; background:#ff6666; border:none; ;"><a href="/wiki/Fr%C3%A2ncio" title="Frâncio"><span style="display:block">Fr</span></a> </td> <td title="Rádio (elemento químico), 88 (alkaline earth metal)" style="text-align:center; background:#ffdead; border:none; ;"><a href="/wiki/R%C3%A1dio_(elemento_qu%C3%ADmico)" title="Rádio (elemento químico)"><span style="display:block">Ra</span></a> </td> <td title="Actínio, 89 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/Act%C3%ADnio" title="Actínio"><span style="display:block">Ac</span></a> </td> <td title="Tório, 90 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/T%C3%B3rio" title="Tório"><span style="display:block">Th</span></a> </td> <td title="Protactínio, 91 (actinide)" style="text-align:center; background:#ff99cc; border:1px solid black; ;"><a class="mw-selflink selflink"><span style="display:block">Pa</span></a> </td> <td title="Urânio, 92 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/Ur%C3%A2nio" title="Urânio"><span style="display:block">U</span></a> </td> <td title="Neptúnio, 93 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/Nept%C3%BAnio" title="Neptúnio"><span style="display:block">Np</span></a> </td> <td title="Plutónio, 94 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/Plut%C3%B3nio" title="Plutónio"><span style="display:block">Pu</span></a> </td> <td title="Amerício, 95 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/Amer%C3%ADcio" title="Amerício"><span style="display:block">Am</span></a> </td> <td title="Cúrio, 96 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/C%C3%BArio" title="Cúrio"><span style="display:block">Cm</span></a> </td> <td title="Berquélio, 97 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/Berqu%C3%A9lio" title="Berquélio"><span style="display:block">Bk</span></a> </td> <td title="Califórnio, 98 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/Calif%C3%B3rnio" title="Califórnio"><span style="display:block">Cf</span></a> </td> <td title="Einstênio, 99 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/Einst%C3%AAnio" title="Einstênio"><span style="display:block">Es</span></a> </td> <td title="Férmio, 100 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/F%C3%A9rmio" title="Férmio"><span style="display:block">Fm</span></a> </td> <td title="Mendelévio, 101 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/Mendel%C3%A9vio" title="Mendelévio"><span style="display:block">Md</span></a> </td> <td title="Nobélio, 102 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/Nob%C3%A9lio" title="Nobélio"><span style="display:block">No</span></a> </td> <td title="Laurêncio, 103 (actinide)" style="text-align:center; background:#ff99cc; border:none; ;"><a href="/wiki/Laur%C3%AAncio" title="Laurêncio"><span style="display:block">Lr</span></a> </td> <td title="Rutherfórdio, 104 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Rutherf%C3%B3rdio" title="Rutherfórdio"><span style="display:block">Rf</span></a> </td> <td title="Dúbnio, 105 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/D%C3%BAbnio" title="Dúbnio"><span style="display:block">Db</span></a> </td> <td title="Seabórgio, 106 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/Seab%C3%B3rgio" title="Seabórgio"><span style="display:block">Sg</span></a> </td> <td title="Bóhrio, 107 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/B%C3%B3hrio" title="Bóhrio"><span style="display:block">Bh</span></a> </td> <td title="Hássio, 108 (transition metal)" style="text-align:center; background:#ffc0c0; border:none; ;"><a href="/wiki/H%C3%A1ssio" title="Hássio"><span style="display:block">Hs</span></a> </td> <td title="Meitnério, 109 (unknown chemical properties)" style="text-align:center; background:#e8e8e8; border:none; ;"><a href="/wiki/Meitn%C3%A9rio" title="Meitnério"><span style="display:block">Mt</span></a> </td> <td title="Darmstádtio, 110 (unknown chemical properties)" style="text-align:center; background:#e8e8e8; border:none; ;"><a href="/wiki/Darmst%C3%A1dtio" title="Darmstádtio"><span style="display:block">Ds</span></a> </td> <td title="Roentgênio, 111 (unknown chemical properties)" style="text-align:center; background:#e8e8e8; border:none; ;"><a href="/wiki/Roentg%C3%AAnio" title="Roentgênio"><span style="display:block">Rg</span></a> </td> <td title="Copernício, 112 (post-transition metal)" style="text-align:center; background:#cccccc; border:none; ;"><a href="/wiki/Copern%C3%ADcio" title="Copernício"><span style="display:block">Cn</span></a> </td> <td title="Nihonium, 113 (unknown chemical properties)" style="text-align:center; background:#e8e8e8; border:none; ;"><a href="/wiki/Nihonium" title="Nihonium"><span style="display:block">Nh</span></a> </td> <td title="Fleróvio, 114 (unknown chemical properties)" style="text-align:center; background:#e8e8e8; border:none; ;"><a href="/wiki/Fler%C3%B3vio" title="Fleróvio"><span style="display:block">Fl</span></a> </td> <td title="Moscóvio, 115 (unknown chemical properties)" style="text-align:center; background:#e8e8e8; border:none; ;"><a href="/wiki/Mosc%C3%B3vio" title="Moscóvio"><span style="display:block">Mc</span></a> </td> <td title="Livermório, 116 (unknown chemical properties)" style="text-align:center; background:#e8e8e8; border:none; ;"><a href="/wiki/Liverm%C3%B3rio" title="Livermório"><span style="display:block">Lv</span></a> </td> <td title="Tenesso, 117 (unknown chemical properties)" style="text-align:center; background:#e8e8e8; border:none; ;"><a href="/wiki/Tenesso" title="Tenesso"><span style="display:block">Ts</span></a> </td> <td title="Oganesson, 118 (unknown chemical properties)" style="text-align:center; background:#e8e8e8; border:none; ;"><a href="/wiki/Oganesson" title="Oganesson"><span style="display:block">Og</span></a> </td></tr></tbody></table> </div></td></tr><tr><td colspan="2" class="navbox-list navbox-even wraplinks" style="width:100%;padding:0px"><div style="padding:0em 0.25em"> <table role="presentation" id="periodic-table-legend" class="wikitable" style="width:100%; line-height:120%; text-align:center; vertical-align:top; font-size:85%; background:#f8f8f8; margin:0; font-size:90%; margin-top:0.5em;"> <tbody><tr> <td> <table style="width:100%; table-layout:fixed; overflow:hidden;"> <tbody><tr> <td style="padding:0 1px; background:#ff6666;"><a href="/wiki/Metal_alcalino" title="Metal alcalino">Metais alcalinos</a> </td> <td style="padding:0 1px; background:#ffdead;"><a href="/wiki/Metal_alcalinoterroso" title="Metal alcalinoterroso">Metais alcalinos-terrosos</a> </td> <td style="padding:0 1px; background:#ffbfff;"><a href="/wiki/Lantan%C3%ADdeo" title="Lantanídeo">Lantanídeos</a> </td> <td style="padding:0 1px; background:#ff99cc;"><a href="/wiki/Actin%C3%ADdeo" title="Actinídeo">Actinídeos</a> </td> <td style="padding:0 1px; background:#ffc0c0;"><a href="/wiki/Metal_de_transi%C3%A7%C3%A3o" title="Metal de transição">Metais de<br />transição</a> </td> <td style="padding:0 1px; background:#cccccc;"><a href="/wiki/Metal_p%C3%B3s-transi%C3%A7%C3%A3o" title="Metal pós-transição">Metais<br />pós-transição</a> </td> <td style="padding:0 1px; background:#cccc99;"><a href="/wiki/Semimetal" title="Semimetal">Semimetais</a> </td> <td style="padding:0 1px; background:#a1ffc3;"><a href="/wiki/N%C3%A3o_metal" class="mw-redirect" title="Não metal">Não-metais<br />poliatômicos</a> </td> <td style="padding:0 1px; background:#e7ff8f;"><a href="/wiki/N%C3%A3o_metal" class="mw-redirect" title="Não metal">Diatômicos não metais</a> </td> <td style="padding:0 1px; background:#c0ffff;"><a href="/wiki/G%C3%A1s_nobre" title="Gás nobre">Gases nobres</a> </td> <td rowspan="1" style="padding:0 1px; background:#e8e8e8;">Propriedades<br />químicas<br />desconhecidas </td></tr> </tbody></table> </td></tr> </tbody></table> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; 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