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Dit is echter niet verplicht." class=""><span>Account aanmaken</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Speciaal:Aanmelden&returnto=Thorium" title="U wordt van harte uitgenodigd om aan te melden, maar dit is niet verplicht [o]" accesskey="o" class=""><span>Aanmelden</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Meer opties" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Persoonlijke hulpmiddelen" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-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-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Persoonlijke hulpmiddelen</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Gebruikersmenu" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_nl.wikipedia.org&uselang=nl"><span>Doneren</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Speciaal:GebruikerAanmaken&returnto=Thorium" title="Registreer u vooral en meld u aan. 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accesskey="y"><span>Bijdragen</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Speciaal:MijnOverleg" title="Overlegpagina van de anonieme gebruiker van dit IP-adres [n]" accesskey="n"><span>Overleg</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Inhoud" 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">Inhoud</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">naar zijbalk verplaatsen</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">verbergen</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">Top</div> </a> </li> <li id="toc-Ontdekking" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ontdekking"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Ontdekking</span> </div> </a> <ul id="toc-Ontdekking-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Toepassingen" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Toepassingen"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Toepassingen</span> </div> </a> <ul id="toc-Toepassingen-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Opmerkelijke_eigenschappen" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Opmerkelijke_eigenschappen"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Opmerkelijke eigenschappen</span> </div> </a> <ul id="toc-Opmerkelijke_eigenschappen-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Verschijning" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Verschijning"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Verschijning</span> </div> </a> <ul id="toc-Verschijning-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Isotopen" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Isotopen"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Isotopen</span> </div> </a> <ul id="toc-Isotopen-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Thorium_als_kernbrandstof" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Thorium_als_kernbrandstof"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Thorium als kernbrandstof</span> </div> </a> <ul id="toc-Thorium_als_kernbrandstof-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Toxicologie_en_veiligheid" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Toxicologie_en_veiligheid"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Toxicologie en veiligheid</span> </div> </a> <ul id="toc-Toxicologie_en_veiligheid-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Externe_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Externe_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Externe links</span> </div> </a> <ul id="toc-Externe_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Inhoud" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Inhoudsopgave omschakelen" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Inhoudsopgave omschakelen</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Thorium</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ga naar een artikel in een andere taal. Beschikbaar in 138 talen" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-138" 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">138 talen</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Torium" title="Torium – Afrikaans" lang="af" hreflang="af" data-title="Torium" data-language-autonym="Afrikaans" data-language-local-name="Afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-am mw-list-item"><a href="https://am.wikipedia.org/wiki/%E1%89%B6%E1%88%AA%E1%8B%A8%E1%88%9D" title="ቶሪየም – Amhaars" lang="am" hreflang="am" data-title="ቶሪየም" data-language-autonym="አማርኛ" data-language-local-name="Amhaars" class="interlanguage-link-target"><span>አማርኛ</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Torio" title="Torio – Aragonees" lang="an" hreflang="an" data-title="Torio" data-language-autonym="Aragonés" data-language-local-name="Aragonees" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-anp mw-list-item"><a href="https://anp.wikipedia.org/wiki/%E0%A4%A5%E0%A5%8B%E0%A4%B0%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="थोरियम – Angika" lang="anp" hreflang="anp" data-title="थोरियम" 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%AB%D9%88%D8%B1%D9%8A%D9%88%D9%85" title="ثوريوم – Arabisch" lang="ar" hreflang="ar" data-title="ثوريوم" data-language-autonym="العربية" data-language-local-name="Arabisch" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D8%B7%D9%88%D8%B1%D9%8A%D9%88%D9%85" title="طوريوم – Marokkaans Arabisch" lang="ary" hreflang="ary" data-title="طوريوم" data-language-autonym="الدارجة" data-language-local-name="Marokkaans Arabisch" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%AB%D9%88%D8%B1%D9%8A%D9%88%D9%85" title="ثوريوم – Egyptisch Arabisch" lang="arz" hreflang="arz" data-title="ثوريوم" data-language-autonym="مصرى" data-language-local-name="Egyptisch Arabisch" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Toriu" title="Toriu – Asturisch" lang="ast" hreflang="ast" data-title="Toriu" data-language-autonym="Asturianu" data-language-local-name="Asturisch" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Torium" title="Torium – Azerbeidzjaans" lang="az" hreflang="az" data-title="Torium" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbeidzjaans" 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/Thorium" title="Thorium – Balinees" lang="ban" hreflang="ban" data-title="Thorium" data-language-autonym="Basa Bali" data-language-local-name="Balinees" class="interlanguage-link-target"><span>Basa Bali</span></a></li><li class="interlanguage-link interwiki-bcl mw-list-item"><a href="https://bcl.wikipedia.org/wiki/Toryo" title="Toryo – Central Bikol" lang="bcl" hreflang="bcl" data-title="Toryo" data-language-autonym="Bikol Central" data-language-local-name="Central Bikol" class="interlanguage-link-target"><span>Bikol Central</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A2%D0%BE%D1%80%D1%8B%D0%B9" title="Торый – Belarussisch" lang="be" hreflang="be" data-title="Торый" data-language-autonym="Беларуская" data-language-local-name="Belarussisch" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%A2%D0%BE%D1%80_(%D1%8D%D0%BB%D0%B5%D0%BC%D1%8D%D0%BD%D1%82)" title="Тор (элемэнт) – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Тор (элемэнт)" 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%A2%D0%BE%D1%80%D0%B8%D0%B9" title="Торий – Bulgaars" lang="bg" hreflang="bg" data-title="Торий" data-language-autonym="Български" data-language-local-name="Bulgaars" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bh mw-list-item"><a href="https://bh.wikipedia.org/wiki/%E0%A4%A5%E0%A5%8B%E0%A4%B0%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="थोरियम – Bhojpuri" lang="bh" hreflang="bh" data-title="थोरियम" 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%A5%E0%A7%8B%E0%A6%B0%E0%A6%BF%E0%A6%AF%E0%A6%BC%E0%A6%BE%E0%A6%AE" title="থোরিয়াম – Bengaals" lang="bn" hreflang="bn" data-title="থোরিয়াম" data-language-autonym="বাংলা" data-language-local-name="Bengaals" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bo mw-list-item"><a href="https://bo.wikipedia.org/wiki/%E0%BD%90%E0%BD%BC%E0%BC%8B%E0%BD%A2%E0%BD%B2%E0%BD%98%E0%BC%8D" title="ཐོ་རིམ། – Tibetaans" lang="bo" hreflang="bo" data-title="ཐོ་རིམ།" data-language-autonym="བོད་ཡིག" data-language-local-name="Tibetaans" class="interlanguage-link-target"><span>བོད་ཡིག</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Toriom" title="Toriom – Bretons" lang="br" hreflang="br" data-title="Toriom" data-language-autonym="Brezhoneg" data-language-local-name="Bretons" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Torij" title="Torij – Bosnisch" lang="bs" hreflang="bs" data-title="Torij" data-language-autonym="Bosanski" data-language-local-name="Bosnisch" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Tori" title="Tori – Catalaans" lang="ca" hreflang="ca" data-title="Tori" data-language-autonym="Català" data-language-local-name="Catalaans" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/Thorium" title="Thorium – Mindong" lang="cdo" hreflang="cdo" data-title="Thorium" 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/Toryo" title="Toryo – Cebuano" lang="ceb" hreflang="ceb" data-title="Toryo" data-language-autonym="Cebuano" data-language-local-name="Cebuano" class="interlanguage-link-target"><span>Cebuano</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%AA%DB%86%D8%B1%DB%8C%DB%86%D9%85" title="تۆریۆم – Soranî" lang="ckb" hreflang="ckb" data-title="تۆریۆم" data-language-autonym="کوردی" data-language-local-name="Soranî" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-co mw-list-item"><a href="https://co.wikipedia.org/wiki/Toriu" title="Toriu – Corsicaans" lang="co" hreflang="co" data-title="Toriu" data-language-autonym="Corsu" data-language-local-name="Corsicaans" class="interlanguage-link-target"><span>Corsu</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Thorium" title="Thorium – Tsjechisch" lang="cs" hreflang="cs" data-title="Thorium" data-language-autonym="Čeština" data-language-local-name="Tsjechisch" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%A2%D0%BE%D1%80%D0%B8%D0%B9" title="Торий – Tsjoevasjisch" lang="cv" hreflang="cv" data-title="Торий" data-language-autonym="Чӑвашла" data-language-local-name="Tsjoevasjisch" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Thoriwm" title="Thoriwm – Welsh" lang="cy" hreflang="cy" data-title="Thoriwm" data-language-autonym="Cymraeg" data-language-local-name="Welsh" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Thorium" title="Thorium – Deens" lang="da" hreflang="da" data-title="Thorium" data-language-autonym="Dansk" data-language-local-name="Deens" 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/Thorium" title="Thorium – Duits" lang="de" hreflang="de" data-title="Thorium" data-language-autonym="Deutsch" data-language-local-name="Duits" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-diq mw-list-item"><a href="https://diq.wikipedia.org/wiki/Toryum" title="Toryum – Zazaki" lang="diq" hreflang="diq" data-title="Toryum" data-language-autonym="Zazaki" data-language-local-name="Zazaki" class="interlanguage-link-target"><span>Zazaki</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%98%CF%8C%CF%81%CE%B9%CE%BF" title="Θόριο – Grieks" lang="el" hreflang="el" data-title="Θόριο" data-language-autonym="Ελληνικά" data-language-local-name="Grieks" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en badge-Q17437796 badge-featuredarticle mw-list-item" title="uitgelicht artikel"><a href="https://en.wikipedia.org/wiki/Thorium" title="Thorium – Engels" lang="en" hreflang="en" data-title="Thorium" data-language-autonym="English" data-language-local-name="Engels" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Torio" title="Torio – Esperanto" lang="eo" hreflang="eo" data-title="Torio" 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/Torio" title="Torio – Spaans" lang="es" hreflang="es" data-title="Torio" data-language-autonym="Español" data-language-local-name="Spaans" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Toorium" title="Toorium – Estisch" lang="et" hreflang="et" data-title="Toorium" data-language-autonym="Eesti" data-language-local-name="Estisch" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Torio" title="Torio – Baskisch" lang="eu" hreflang="eu" data-title="Torio" data-language-autonym="Euskara" data-language-local-name="Baskisch" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AA%D9%88%D8%B1%DB%8C%D9%85" title="توریم – Perzisch" lang="fa" hreflang="fa" data-title="توریم" data-language-autonym="فارسی" data-language-local-name="Perzisch" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Torium" title="Torium – Fins" lang="fi" hreflang="fi" data-title="Torium" data-language-autonym="Suomi" data-language-local-name="Fins" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fo mw-list-item"><a href="https://fo.wikipedia.org/wiki/Thorium" title="Thorium – Faeröers" lang="fo" hreflang="fo" data-title="Thorium" data-language-autonym="Føroyskt" data-language-local-name="Faeröers" class="interlanguage-link-target"><span>Føroyskt</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Thorium" title="Thorium – Frans" lang="fr" hreflang="fr" data-title="Thorium" data-language-autonym="Français" data-language-local-name="Frans" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Toorium" title="Toorium – Noord-Fries" lang="frr" hreflang="frr" data-title="Toorium" data-language-autonym="Nordfriisk" data-language-local-name="Noord-Fries" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-fur mw-list-item"><a href="https://fur.wikipedia.org/wiki/Tori" title="Tori – Friulisch" lang="fur" hreflang="fur" data-title="Tori" data-language-autonym="Furlan" data-language-local-name="Friulisch" class="interlanguage-link-target"><span>Furlan</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/T%C3%B3iriam" title="Tóiriam – Iers" lang="ga" hreflang="ga" data-title="Tóiriam" data-language-autonym="Gaeilge" data-language-local-name="Iers" 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/Torium" title="Torium – Schots-Gaelisch" lang="gd" hreflang="gd" data-title="Torium" data-language-autonym="Gàidhlig" data-language-local-name="Schots-Gaelisch" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Torio" title="Torio – Galicisch" lang="gl" hreflang="gl" data-title="Torio" data-language-autonym="Galego" data-language-local-name="Galicisch" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gu mw-list-item"><a href="https://gu.wikipedia.org/wiki/%E0%AA%A5%E0%AB%8B%E0%AA%B0%E0%AB%80%E0%AA%AF%E0%AA%AE" title="થોરીયમ – Gujarati" lang="gu" hreflang="gu" data-title="થોરીયમ" data-language-autonym="ગુજરાતી" data-language-local-name="Gujarati" class="interlanguage-link-target"><span>ગુજરાતી</span></a></li><li class="interlanguage-link interwiki-gv mw-list-item"><a href="https://gv.wikipedia.org/wiki/Thorium" title="Thorium – Manx" lang="gv" hreflang="gv" data-title="Thorium" 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/Thorium" title="Thorium – Hakka" lang="hak" hreflang="hak" data-title="Thorium" data-language-autonym="客家語 / Hak-kâ-ngî" data-language-local-name="Hakka" class="interlanguage-link-target"><span>客家語 / Hak-kâ-ngî</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%AA%D7%95%D7%A8%D7%99%D7%95%D7%9D" title="תוריום – Hebreeuws" lang="he" hreflang="he" data-title="תוריום" data-language-autonym="עברית" data-language-local-name="Hebreeuws" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%A5%E0%A5%8B%E0%A4%B0%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="थोरियम – Hindi" lang="hi" hreflang="hi" data-title="थोरियम" 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/Thorium" title="Thorium – Fijisch Hindi" lang="hif" hreflang="hif" data-title="Thorium" data-language-autonym="Fiji Hindi" data-language-local-name="Fijisch Hindi" class="interlanguage-link-target"><span>Fiji Hindi</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Torij" title="Torij – Kroatisch" lang="hr" hreflang="hr" data-title="Torij" data-language-autonym="Hrvatski" data-language-local-name="Kroatisch" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Tory%C3%B2m" title="Toryòm – Haïtiaans Creools" lang="ht" hreflang="ht" data-title="Toryòm" data-language-autonym="Kreyòl ayisyen" data-language-local-name="Haïtiaans Creools" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/T%C3%B3rium" title="Tórium – Hongaars" lang="hu" hreflang="hu" data-title="Tórium" data-language-autonym="Magyar" data-language-local-name="Hongaars" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%B9%D5%B8%D6%80%D5%AB%D5%B8%D6%82%D5%B4" title="Թորիում – Armeens" lang="hy" hreflang="hy" data-title="Թորիում" data-language-autonym="Հայերեն" data-language-local-name="Armeens" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Thorium" title="Thorium – Interlingua" lang="ia" hreflang="ia" data-title="Thorium" data-language-autonym="Interlingua" data-language-local-name="Interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Torium" title="Torium – Indonesisch" lang="id" hreflang="id" data-title="Torium" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesisch" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Torio" title="Torio – Ido" lang="io" hreflang="io" data-title="Torio" data-language-autonym="Ido" data-language-local-name="Ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/%C3%9E%C3%B3r%C3%ADn" title="Þórín – IJslands" lang="is" hreflang="is" data-title="Þórín" data-language-autonym="Íslenska" data-language-local-name="IJslands" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Torio" title="Torio – Italiaans" lang="it" hreflang="it" data-title="Torio" data-language-autonym="Italiano" data-language-local-name="Italiaans" 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%88%E3%83%AA%E3%82%A6%E3%83%A0" title="トリウム – Japans" lang="ja" hreflang="ja" data-title="トリウム" data-language-autonym="日本語" data-language-local-name="Japans" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-jbo mw-list-item"><a href="https://jbo.wikipedia.org/wiki/lidycevjinme" title="lidycevjinme – Lojban" lang="jbo" hreflang="jbo" data-title="lidycevjinme" 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-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%97%E1%83%9D%E1%83%A0%E1%83%98%E1%83%A3%E1%83%9B%E1%83%98" title="თორიუმი – Georgisch" lang="ka" hreflang="ka" data-title="თორიუმი" data-language-autonym="ქართული" data-language-local-name="Georgisch" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kbp mw-list-item"><a href="https://kbp.wikipedia.org/wiki/T%C9%94r%C9%A9y%C9%94m" title="Tɔrɩyɔm – Kabiye" lang="kbp" hreflang="kbp" data-title="Tɔrɩyɔm" 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%A2%D0%BE%D1%80%D0%B8%D0%B9" title="Торий – Kazachs" lang="kk" hreflang="kk" data-title="Торий" data-language-autonym="Қазақша" data-language-local-name="Kazachs" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%A5%E0%B3%8B%E0%B2%B0%E0%B2%BF%E0%B2%AF%E0%B2%AE%E0%B3%8D" title="ಥೋರಿಯಮ್ – Kannada" lang="kn" hreflang="kn" data-title="ಥೋರಿಯಮ್" data-language-autonym="ಕನ್ನಡ" data-language-local-name="Kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%86%A0%EB%A5%A8" title="토륨 – Koreaans" lang="ko" hreflang="ko" data-title="토륨" data-language-autonym="한국어" data-language-local-name="Koreaans" 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%A2%D0%BE%D1%80%D0%B8%D0%B9" title="Торий – Komi" lang="kv" hreflang="kv" data-title="Торий" 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/Thoriom" title="Thoriom – Cornish" lang="kw" hreflang="kw" data-title="Thoriom" data-language-autonym="Kernowek" data-language-local-name="Cornish" class="interlanguage-link-target"><span>Kernowek</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%A2%D0%BE%D1%80%D0%B8%D0%B9" title="Торий – Kirgizisch" lang="ky" hreflang="ky" data-title="Торий" data-language-autonym="Кыргызча" data-language-local-name="Kirgizisch" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Thorium" title="Thorium – Latijn" lang="la" hreflang="la" data-title="Thorium" data-language-autonym="Latina" data-language-local-name="Latijn" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Thorium" title="Thorium – Luxemburgs" lang="lb" hreflang="lb" data-title="Thorium" data-language-autonym="Lëtzebuergesch" data-language-local-name="Luxemburgs" 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/Thorium" title="Thorium – Limburgs" lang="li" hreflang="li" data-title="Thorium" data-language-autonym="Limburgs" data-language-local-name="Limburgs" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-lij mw-list-item"><a href="https://lij.wikipedia.org/wiki/Torio" title="Torio – Ligurisch" lang="lij" hreflang="lij" data-title="Torio" data-language-autonym="Ligure" data-language-local-name="Ligurisch" class="interlanguage-link-target"><span>Ligure</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Torio" title="Torio – Lombardisch" lang="lmo" hreflang="lmo" data-title="Torio" data-language-autonym="Lombard" data-language-local-name="Lombardisch" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Toris" title="Toris – Litouws" lang="lt" hreflang="lt" data-title="Toris" data-language-autonym="Lietuvių" data-language-local-name="Litouws" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Torijs" title="Torijs – Lets" lang="lv" hreflang="lv" data-title="Torijs" data-language-autonym="Latviešu" data-language-local-name="Lets" 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%A2%D0%BE%D1%80%D0%B8%D1%83%D0%BC" title="Ториум – Macedonisch" lang="mk" hreflang="mk" data-title="Ториум" data-language-autonym="Македонски" data-language-local-name="Macedonisch" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%A4%E0%B5%8B%E0%B4%B1%E0%B4%BF%E0%B4%AF%E0%B4%82" title="തോറിയം – Malayalam" lang="ml" hreflang="ml" data-title="തോറിയം" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%A2%D0%BE%D1%80%D0%B8" title="Тори – Mongools" lang="mn" hreflang="mn" data-title="Тори" data-language-autonym="Монгол" data-language-local-name="Mongools" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%A5%E0%A5%8B%E0%A4%B0%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="थोरियम – Marathi" lang="mr" hreflang="mr" data-title="थोरियम" data-language-autonym="मराठी" data-language-local-name="Marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-mrj mw-list-item"><a href="https://mrj.wikipedia.org/wiki/%D0%A2%D0%BE%D1%80%D0%B8%D0%B9" title="Торий – West-Mari" lang="mrj" hreflang="mrj" data-title="Торий" data-language-autonym="Кырык мары" data-language-local-name="West-Mari" class="interlanguage-link-target"><span>Кырык мары</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Torium" title="Torium – Maleis" lang="ms" hreflang="ms" data-title="Torium" data-language-autonym="Bahasa Melayu" data-language-local-name="Maleis" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%9E%E1%80%AD%E1%80%AF%E1%80%9B%E1%80%AE%E1%80%9A%E1%80%99%E1%80%BA" title="သိုရီယမ် – Birmaans" lang="my" hreflang="my" data-title="သိုရီယမ်" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="Birmaans" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Thorium" title="Thorium – Nedersaksisch" lang="nds" hreflang="nds" data-title="Thorium" data-language-autonym="Plattdüütsch" data-language-local-name="Nedersaksisch" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%A5%E0%A5%8B%E0%A4%B0%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="थोरियम – Nepalees" lang="ne" hreflang="ne" data-title="थोरियम" data-language-autonym="नेपाली" data-language-local-name="Nepalees" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-new mw-list-item"><a href="https://new.wikipedia.org/wiki/%E0%A4%A5%E0%A5%8B%E0%A4%B0%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="थोरियम – Newari" lang="new" hreflang="new" data-title="थोरियम" data-language-autonym="नेपाल भाषा" data-language-local-name="Newari" class="interlanguage-link-target"><span>नेपाल भाषा</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Thorium" title="Thorium – Noors - Nynorsk" lang="nn" hreflang="nn" data-title="Thorium" data-language-autonym="Norsk nynorsk" data-language-local-name="Noors - Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Thorium" title="Thorium – Noors - Bokmål" lang="nb" hreflang="nb" data-title="Thorium" data-language-autonym="Norsk bokmål" data-language-local-name="Noors - Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/T%C3%B2ri" title="Tòri – Occitaans" lang="oc" hreflang="oc" data-title="Tòri" data-language-autonym="Occitan" data-language-local-name="Occitaans" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-olo mw-list-item"><a href="https://olo.wikipedia.org/wiki/Torii" title="Torii – Livvi-Karelian" lang="olo" hreflang="olo" data-title="Torii" data-language-autonym="Livvinkarjala" data-language-local-name="Livvi-Karelian" class="interlanguage-link-target"><span>Livvinkarjala</span></a></li><li class="interlanguage-link interwiki-or mw-list-item"><a href="https://or.wikipedia.org/wiki/%E0%AC%A5%E0%AD%8B%E0%AC%B0%E0%AC%BF%E0%AC%85%E0%AC%AE" title="ଥୋରିଅମ – Odia" lang="or" hreflang="or" data-title="ଥୋରିଅମ" data-language-autonym="ଓଡ଼ିଆ" data-language-local-name="Odia" class="interlanguage-link-target"><span>ଓଡ଼ିଆ</span></a></li><li class="interlanguage-link interwiki-pi mw-list-item"><a href="https://pi.wikipedia.org/wiki/%E0%A4%A5%E0%A5%8B%E0%A4%B0%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="थोरियम – Pali" lang="pi" hreflang="pi" data-title="थोरियम" data-language-autonym="पालि" data-language-local-name="Pali" class="interlanguage-link-target"><span>पालि</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Tor_(pierwiastek)" title="Tor (pierwiastek) – Pools" lang="pl" hreflang="pl" data-title="Tor (pierwiastek)" data-language-autonym="Polski" data-language-local-name="Pools" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pms mw-list-item"><a href="https://pms.wikipedia.org/wiki/T%C3%B2rio" title="Tòrio – Piëmontees" lang="pms" hreflang="pms" data-title="Tòrio" data-language-autonym="Piemontèis" data-language-local-name="Piëmontees" class="interlanguage-link-target"><span>Piemontèis</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D8%AA%DA%BE%D9%88%D8%B1%DB%8C%D9%85" title="تھوریم – Western Punjabi" lang="pnb" hreflang="pnb" data-title="تھوریم" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D8%AA%D9%88%D8%B1%D9%8A%D9%88%D9%85" title="توريوم – Pasjtoe" lang="ps" hreflang="ps" data-title="توريوم" data-language-autonym="پښتو" data-language-local-name="Pasjtoe" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/T%C3%B3rio" title="Tório – Portugees" lang="pt" hreflang="pt" data-title="Tório" data-language-autonym="Português" data-language-local-name="Portugees" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/Thuryu" title="Thuryu – Quechua" lang="qu" hreflang="qu" data-title="Thuryu" data-language-autonym="Runa Simi" data-language-local-name="Quechua" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Thoriu" title="Thoriu – Roemeens" lang="ro" hreflang="ro" data-title="Thoriu" data-language-autonym="Română" data-language-local-name="Roemeens" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-roa-rup mw-list-item"><a href="https://roa-rup.wikipedia.org/wiki/Toriu" title="Toriu – Aroemeens" lang="rup" hreflang="rup" data-title="Toriu" data-language-autonym="Armãneashti" data-language-local-name="Aroemeens" class="interlanguage-link-target"><span>Armãneashti</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A2%D0%BE%D1%80%D0%B8%D0%B9" title="Торий – Russisch" lang="ru" hreflang="ru" data-title="Торий" data-language-autonym="Русский" data-language-local-name="Russisch" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sa mw-list-item"><a href="https://sa.wikipedia.org/wiki/%E0%A4%A5%E0%A5%8B%E0%A4%B0%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="थोरियम – Sanskriet" lang="sa" hreflang="sa" data-title="थोरियम" data-language-autonym="संस्कृतम्" data-language-local-name="Sanskriet" class="interlanguage-link-target"><span>संस्कृतम्</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%A2%D0%BE%D1%80%D0%B8%D1%83%D0%BC" title="Ториум – Jakoets" lang="sah" hreflang="sah" data-title="Ториум" data-language-autonym="Саха тыла" data-language-local-name="Jakoets" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sc mw-list-item"><a href="https://sc.wikipedia.org/wiki/T%C3%B2riu" title="Tòriu – Sardijns" lang="sc" hreflang="sc" data-title="Tòriu" data-language-autonym="Sardu" data-language-local-name="Sardijns" class="interlanguage-link-target"><span>Sardu</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Toriu" title="Toriu – Siciliaans" lang="scn" hreflang="scn" data-title="Toriu" data-language-autonym="Sicilianu" data-language-local-name="Siciliaans" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Torijum" title="Torijum – Servo-Kroatisch" lang="sh" hreflang="sh" data-title="Torijum" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Servo-Kroatisch" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%AD%E0%B7%9D%E0%B6%BB%E0%B7%92%E0%B6%BA%E0%B6%B8%E0%B7%8A" title="තෝරියම් – Singalees" lang="si" hreflang="si" data-title="තෝරියම්" data-language-autonym="සිංහල" data-language-local-name="Singalees" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Thorium" title="Thorium – Simple English" lang="en-simple" hreflang="en-simple" data-title="Thorium" 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/T%C3%B3rium" title="Tórium – Slowaaks" lang="sk" hreflang="sk" data-title="Tórium" data-language-autonym="Slovenčina" data-language-local-name="Slowaaks" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Torij" title="Torij – Sloveens" lang="sl" hreflang="sl" data-title="Torij" data-language-autonym="Slovenščina" data-language-local-name="Sloveens" 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/Toriumi" title="Toriumi – Albanees" lang="sq" hreflang="sq" data-title="Toriumi" data-language-autonym="Shqip" data-language-local-name="Albanees" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A2%D0%BE%D1%80%D0%B8%D1%98%D1%83%D0%BC" title="Торијум – Servisch" lang="sr" hreflang="sr" data-title="Торијум" data-language-autonym="Српски / srpski" data-language-local-name="Servisch" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-stq mw-list-item"><a href="https://stq.wikipedia.org/wiki/Thorium" title="Thorium – Saterfries" lang="stq" hreflang="stq" data-title="Thorium" data-language-autonym="Seeltersk" data-language-local-name="Saterfries" class="interlanguage-link-target"><span>Seeltersk</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Torium" title="Torium – Zweeds" lang="sv" hreflang="sv" data-title="Torium" data-language-autonym="Svenska" data-language-local-name="Zweeds" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Thori" title="Thori – Swahili" lang="sw" hreflang="sw" data-title="Thori" data-language-autonym="Kiswahili" data-language-local-name="Swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%A4%E0%AF%8B%E0%AE%B0%E0%AE%BF%E0%AE%AF%E0%AE%AE%E0%AF%8D" title="தோரியம் – Tamil" lang="ta" hreflang="ta" data-title="தோரியம்" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%A5%E0%B1%8B%E0%B0%B0%E0%B0%BF%E0%B0%AF%E0%B0%82" title="థోరియం – Telugu" lang="te" hreflang="te" data-title="థోరియం" 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%A2%D0%BE%D1%80%D0%B8%D0%B9" title="Торий – Tadzjieks" lang="tg" hreflang="tg" data-title="Торий" data-language-autonym="Тоҷикӣ" data-language-local-name="Tadzjieks" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%97%E0%B8%AD%E0%B9%80%E0%B8%A3%E0%B8%B5%E0%B8%A2%E0%B8%A1" title="ทอเรียม – Thai" lang="th" hreflang="th" data-title="ทอเรียม" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tl badge-Q70894304 mw-list-item" title=""><a href="https://tl.wikipedia.org/wiki/Toryo" title="Toryo – Tagalog" lang="tl" hreflang="tl" data-title="Toryo" data-language-autonym="Tagalog" data-language-local-name="Tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Toryum" title="Toryum – Turks" lang="tr" hreflang="tr" data-title="Toryum" data-language-autonym="Türkçe" data-language-local-name="Turks" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%A2%D0%BE%D1%80%D0%B8%D0%B9" title="Торий – Tataars" lang="tt" hreflang="tt" data-title="Торий" data-language-autonym="Татарча / tatarça" data-language-local-name="Tataars" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-ug mw-list-item"><a href="https://ug.wikipedia.org/wiki/%D8%AA%D9%88%D8%B1%D9%89%D9%8A" title="تورىي – Oeigoers" lang="ug" hreflang="ug" data-title="تورىي" data-language-autonym="ئۇيغۇرچە / Uyghurche" data-language-local-name="Oeigoers" class="interlanguage-link-target"><span>ئۇيغۇرچە / Uyghurche</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A2%D0%BE%D1%80%D1%96%D0%B9" title="Торій – Oekraïens" lang="uk" hreflang="uk" data-title="Торій" data-language-autonym="Українська" data-language-local-name="Oekraïens" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%AA%DA%BE%D9%88%D8%B1%DB%8C%D8%A6%D9%85" title="تھوریئم – Urdu" lang="ur" hreflang="ur" data-title="تھوریئم" 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/Toriy" title="Toriy – Oezbeeks" lang="uz" hreflang="uz" data-title="Toriy" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Oezbeeks" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vep mw-list-item"><a href="https://vep.wikipedia.org/wiki/Torii" title="Torii – Wepsisch" lang="vep" hreflang="vep" data-title="Torii" data-language-autonym="Vepsän kel’" data-language-local-name="Wepsisch" class="interlanguage-link-target"><span>Vepsän kel’</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Thori" title="Thori – Vietnamees" lang="vi" hreflang="vi" data-title="Thori" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamees" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Toryo" title="Toryo – Waray" lang="war" hreflang="war" data-title="Toryo" 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%92%8D" title="钍 – Wuyu" lang="wuu" hreflang="wuu" data-title="钍" data-language-autonym="吴语" data-language-local-name="Wuyu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-xal mw-list-item"><a href="https://xal.wikipedia.org/wiki/%D0%A2%D0%BE%D1%80%D0%B8%D1%83%D0%BC" title="Ториум – Kalmuks" lang="xal" hreflang="xal" data-title="Ториум" data-language-autonym="Хальмг" data-language-local-name="Kalmuks" 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/T%C3%B3r%C3%AD%E1%BB%8D%CC%80m" title="Tóríọ̀m – Yoruba" lang="yo" hreflang="yo" data-title="Tóríọ̀m" data-language-autonym="Yorùbá" data-language-local-name="Yoruba" class="interlanguage-link-target"><span>Yorùbá</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E9%92%8D" title="钍 – Chinees" lang="zh" hreflang="zh" data-title="钍" data-language-autonym="中文" data-language-local-name="Chinees" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-classical mw-list-item"><a href="https://zh-classical.wikipedia.org/wiki/%E9%87%B7" title="釷 – Klassiek Chinees" lang="lzh" hreflang="lzh" data-title="釷" data-language-autonym="文言" data-language-local-name="Klassiek Chinees" class="interlanguage-link-target"><span>文言</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Thorium" title="Thorium – Minnanyu" lang="nan" hreflang="nan" data-title="Thorium" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnanyu" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E9%87%B7" title="釷 – Kantonees" lang="yue" hreflang="yue" data-title="釷" data-language-autonym="粵語" data-language-local-name="Kantonees" 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lang="nl" dir="ltr"><table class="infobox" cellpadding="1" cellspacing="1"> <tbody><tr> <th class="infobox-kop notheme" style="background-color:#cedaf2; color:inherit; text-align:center; font-size:120%;" colspan="3">Thorium </th></tr> <tr> <td style="text-align:center;" colspan="3"><span> <table style="font-size:85%; padding:0; border-collapse:collapse; text-align:center" border="0" align="center" class="vatop"> <tbody><tr> <td> </td> <th><a href="/wiki/Alkalimetaal" title="Alkalimetaal">1</a></th> <th colspan="16"></th> <th><a href="/wiki/Edelgas" title="Edelgas">18</a> </th></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-1-element" title="Periode-1-element">1</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Waterstof_(element)" title="Waterstof (element)">H</a> </td> <th style="vertical-align: middle;"><a href="/wiki/Aardalkalimetaal" title="Aardalkalimetaal">2</a> </th> <th colspan="10" style="text-align:center"><big><a href="/wiki/Periodiek_systeem" title="Periodiek systeem">Periodiek systeem</a></big> </th> <th style="vertical-align: middle;"><a href="/wiki/Boorgroep" title="Boorgroep">13</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Koolstofgroep" title="Koolstofgroep">14</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Stikstofgroep" title="Stikstofgroep">15</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Zuurstofgroep" title="Zuurstofgroep">16</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Halogeen" title="Halogeen">17</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Helium" title="Helium">He</a> </td></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-2-element" title="Periode-2-element">2</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Lithium_(element)" title="Lithium (element)">Li</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Beryllium" title="Beryllium">Be</a> </td> <td colspan="10" align="center"> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Boor_(element)" title="Boor (element)">B</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Koolstof" title="Koolstof">C</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Stikstof_(element)" title="Stikstof (element)">N</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Zuurstof_(element)" title="Zuurstof (element)">O</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Fluor_(element)" title="Fluor (element)">F</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Neon_(element)" title="Neon (element)">Ne</a> </td></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-3-element" title="Periode-3-element">3</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Natrium" title="Natrium">Na</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Magnesium" title="Magnesium">Mg</a> </td> <th style="vertical-align: middle;"><a href="/wiki/Scandiumgroep" title="Scandiumgroep">3</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Titaangroep" title="Titaangroep">4</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Vanadiumgroep" title="Vanadiumgroep">5</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Chroomgroep" title="Chroomgroep">6</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Mangaangroep" title="Mangaangroep">7</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Platinagroep" title="Platinagroep">8</a> </th> <th style="vertical-align: middle;">9 </th> <th style="vertical-align: middle;">10 </th> <th style="vertical-align: middle;"><a href="/wiki/Kopergroep" title="Kopergroep">11</a> </th> <th style="vertical-align: middle;"><a href="/wiki/Zinkgroep" title="Zinkgroep">12</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Aluminium" title="Aluminium">Al</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Silicium" title="Silicium">Si</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Fosfor" title="Fosfor">P</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Zwavel" title="Zwavel">S</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Chloor_(element)" title="Chloor (element)">Cl</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Argon" title="Argon">Ar</a> </td></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-4-element" title="Periode-4-element">4</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Kalium" title="Kalium">K</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Calcium" title="Calcium">Ca</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Scandium" title="Scandium">Sc</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Titanium" title="Titanium">Ti</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Vanadium" title="Vanadium">V</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Chroom_(element)" title="Chroom (element)">Cr</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Mangaan" title="Mangaan">Mn</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/IJzer_(element)" title="IJzer (element)">Fe</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Kobalt" title="Kobalt">Co</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Nikkel" title="Nikkel">Ni</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Koper_(element)" title="Koper (element)">Cu</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Zink_(element)" title="Zink (element)">Zn</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Gallium" title="Gallium">Ga</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Germanium" title="Germanium">Ge</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Arseen" title="Arseen">As</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Seleen" title="Seleen">Se</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Broom_(element)" title="Broom (element)">Br</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Krypton_(element)" title="Krypton (element)">Kr</a> </td></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-5-element" title="Periode-5-element">5</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Rubidium" title="Rubidium">Rb</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Strontium" title="Strontium">Sr</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Yttrium" title="Yttrium">Y</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Zirkonium" title="Zirkonium">Zr</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Niobium" title="Niobium">Nb</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Molybdeen" title="Molybdeen">Mo</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Technetium" title="Technetium">Tc</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Ruthenium" title="Ruthenium">Ru</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Rodium" title="Rodium">Rh</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Palladium_(element)" title="Palladium (element)">Pd</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Zilver" title="Zilver">Ag</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Cadmium" title="Cadmium">Cd</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Indium" title="Indium">In</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Tin_(element)" title="Tin (element)">Sn</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Antimoon" title="Antimoon">Sb</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Telluur" title="Telluur">Te</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Jodium_(element)" title="Jodium (element)">I</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Xenon" title="Xenon">Xe</a> </td></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-6-element" title="Periode-6-element">6</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Cesium" title="Cesium">Cs</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Barium" title="Barium">Ba</a> </td> <td style="border:1px solid #aaaaaa; vertical-align: middle;" bgcolor="#777"><a href="/wiki/Lanthanide" title="Lanthanide">↓</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Hafnium" title="Hafnium">Hf</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Tantaal" title="Tantaal">Ta</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Wolfraam" title="Wolfraam">W</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Renium" title="Renium">Re</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Osmium" title="Osmium">Os</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Iridium_(element)" title="Iridium (element)">Ir</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Platina" title="Platina">Pt</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Goud" title="Goud">Au</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Kwik" title="Kwik">Hg</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Thallium" title="Thallium">Tl</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Lood_(element)" title="Lood (element)">Pb</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Bismut" title="Bismut">Bi</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Polonium" title="Polonium">Po</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Astaat" title="Astaat">At</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Radon_(element)" title="Radon (element)">Rn</a> </td></tr> <tr> <th style="vertical-align: middle;"><a href="/wiki/Periode-7-element" title="Periode-7-element">7</a> </th> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Francium" title="Francium">Fr</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Radium" title="Radium">Ra</a> </td> <td width="32" style="border:1px solid #aaaaaa; vertical-align: middle;" bgcolor="#d8d"><a href="/wiki/Actinide" title="Actinide">↓↓</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Rutherfordium" title="Rutherfordium">Rf</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Dubnium" title="Dubnium">Db</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Seaborgium" title="Seaborgium">Sg</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Bohrium" title="Bohrium">Bh</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Hassium" title="Hassium">Hs</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Meitnerium" title="Meitnerium">Mt</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Darmstadtium" title="Darmstadtium">Ds</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/R%C3%B6ntgenium" title="Röntgenium">Rg</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Copernicium" title="Copernicium">Cn</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Nihonium" title="Nihonium">Nh</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Flerovium" title="Flerovium">Fl</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Moscovium" title="Moscovium">Mc</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Livermorium" title="Livermorium">Lv</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Tennessine" title="Tennessine">Ts</a> </td> <td width="32" style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Oganesson" title="Oganesson">Og</a> </td></tr> <tr> <td colspan="19">  </td></tr> <tr> <th colspan="3" style="vertical-align: middle;"><a href="/wiki/Lanthanide" title="Lanthanide">Lanthaniden</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Lanthaan" title="Lanthaan">La</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Cerium" title="Cerium">Ce</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Praseodymium" title="Praseodymium">Pr</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Neodymium" title="Neodymium">Nd</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Promethium" title="Promethium">Pm</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Samarium" title="Samarium">Sm</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Europium" title="Europium">Eu</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Gadolinium" title="Gadolinium">Gd</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Terbium" title="Terbium">Tb</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Dysprosium" title="Dysprosium">Dy</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Holmium" title="Holmium">Ho</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Erbium" title="Erbium">Er</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Thulium" title="Thulium">Tm</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Ytterbium" title="Ytterbium">Yb</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Lutetium" title="Lutetium">Lu</a> </td> <td> </td></tr> <tr> <th colspan="3" style="vertical-align: middle;"><a href="/wiki/Actinide" title="Actinide">Actiniden</a> </th> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Actinium" title="Actinium">Ac</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#d8d"><a class="mw-selflink selflink">Th</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Protactinium" title="Protactinium">Pa</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Uranium" title="Uranium">U</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Neptunium" title="Neptunium">Np</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Plutonium" title="Plutonium">Pu</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Americium" title="Americium">Am</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Curium" title="Curium">Cm</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Berkelium" title="Berkelium">Bk</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Californium" title="Californium">Cf</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Einsteinium" title="Einsteinium">Es</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Fermium" title="Fermium">Fm</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Mendelevium" title="Mendelevium">Md</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Nobelium" title="Nobelium">No</a> </td> <td style="border:1px solid #aaaaaa;" bgcolor="#999"><a href="/wiki/Lawrencium" title="Lawrencium">Lr</a> </td> <td> </td></tr></tbody></table></span> </td></tr> <tr> <td style="text-align:center; padding:0;" colspan="3"><span typeof="mw:File"><a href="/wiki/Bestand:Thorium-2.jpg" class="mw-file-description"><img alt="Thorium" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bb/Thorium-2.jpg/304px-Thorium-2.jpg" decoding="async" width="304" height="162" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bb/Thorium-2.jpg/456px-Thorium-2.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bb/Thorium-2.jpg/608px-Thorium-2.jpg 2x" data-file-width="750" data-file-height="400" /></a></span> </td></tr> <tr> <td style="text-align:center;" colspan="3"><div style="font-size:90%">Thorium</div> </td></tr> <tr> <th class="infobox-kop notheme" style="background-color:#cedaf2; color:inherit; text-align:center;" colspan="3">Algemeen </th></tr> <tr> <th><a href="/wiki/Lijst_van_chemische_elementen" title="Lijst van chemische elementen">Naam</a> </th> <td colspan="2">Thorium </td></tr> <tr> <th><a href="/wiki/Lijst_van_chemische_elementen" title="Lijst van chemische elementen">Symbool</a> </th> <td colspan="2">Th </td></tr> <tr> <th><a href="/wiki/Atoomnummer" title="Atoomnummer">Atoomnummer</a> </th> <td colspan="2">90 </td></tr> <tr> <th><a href="/wiki/Groep_(periodiek_systeem)" title="Groep (periodiek systeem)">Groep</a> </th> <td colspan="2"><a href="/wiki/Scandiumgroep" title="Scandiumgroep">Scandiumgroep</a> </td></tr> <tr> <th><a href="/wiki/Periode_(scheikunde)" title="Periode (scheikunde)">Periode</a> </th> <td colspan="2"><a href="/wiki/Periode-7-element" title="Periode-7-element">Periode 7</a> </td></tr> <tr> <th><a href="/wiki/Blok_van_het_periodiek_systeem" title="Blok van het periodiek systeem">Blok</a> </th> <td colspan="2"><a href="/wiki/F-blok" title="F-blok">F-blok</a> </td></tr> <tr> <th><a href="/wiki/Reeks_van_het_periodiek_systeem" title="Reeks van het periodiek systeem">Reeks</a> </th> <td colspan="2"><a href="/wiki/Actinide" title="Actinide">Actiniden</a> </td></tr> <tr> <th><a href="/wiki/Kleur" title="Kleur">Kleur</a> </th> <td colspan="2">Zilverwit </td></tr> <tr> <th class="infobox-kop notheme" style="background-color:#cedaf2; color:inherit;" colspan="3">Chemische eigenschappen </th></tr> <tr> <th><a href="/wiki/Atoommassa" title="Atoommassa">Atoommassa</a> (<a href="/wiki/Atomaire_massa-eenheid" title="Atomaire massa-eenheid">u</a>) </th> <td colspan="2">232,04 </td></tr> <tr> <th><a href="/wiki/Elektronenconfiguratie" title="Elektronenconfiguratie">Elektronenconfiguratie</a> </th> <td colspan="2">[<a href="/wiki/Radon_(element)" title="Radon (element)">Rn</a>]6d<sup>2</sup> 7s<sup>2</sup> </td></tr> <tr> <th><a href="/wiki/Oxidatietoestand" title="Oxidatietoestand">Oxidatietoestanden</a> </th> <td colspan="2">+4 </td></tr> <tr> <th><a href="/wiki/Elektronegativiteit" title="Elektronegativiteit">Elektronegativiteit</a> (<a href="/wiki/Schaal_van_Pauling" title="Schaal van Pauling">Pauling</a>) </th> <td colspan="2">1,4 </td></tr> <tr> <th><a href="/wiki/Atoomstraal" title="Atoomstraal">Atoomstraal</a> (<a href="/wiki/Picometer" title="Picometer">pm</a>) </th> <td colspan="2">180 </td></tr> <tr> <th>1e <a href="/wiki/Ionisatiepotentiaal" title="Ionisatiepotentiaal">ionisatiepotentiaal</a> (<a href="/wiki/Joule" title="Joule">kJ</a>·<a href="/wiki/Mol_(eenheid)" title="Mol (eenheid)">mol</a><sup>−1</sup>) </th> <td colspan="2">608,51 </td></tr> <tr> <th>2e <a href="/wiki/Ionisatiepotentiaal" title="Ionisatiepotentiaal">ionisatiepotentiaal</a> (<a href="/wiki/Joule" title="Joule">kJ</a>·<a href="/wiki/Mol_(eenheid)" title="Mol (eenheid)">mol</a><sup>−1</sup>) </th> <td colspan="2">1109,59 </td></tr> <tr> <th>3e <a href="/wiki/Ionisatiepotentiaal" title="Ionisatiepotentiaal">ionisatiepotentiaal</a> (<a href="/wiki/Joule" title="Joule">kJ</a>·<a href="/wiki/Mol_(eenheid)" title="Mol (eenheid)">mol</a><sup>−1</sup>) </th> <td colspan="2">1929,72 </td></tr> <tr> <th class="infobox-kop notheme" style="background-color:#cedaf2; color:inherit;" colspan="3">Fysische eigenschappen </th></tr> <tr> <th><a href="/wiki/Massadichtheid" title="Massadichtheid">Dichtheid</a> (<a href="/wiki/Kilogram" title="Kilogram">kg</a>·<a href="/wiki/Meter" title="Meter">m</a><sup>−3</sup>) </th> <td colspan="2">11720 </td></tr> <tr> <th><a href="/wiki/Smeltpunt" title="Smeltpunt">Smeltpunt</a> (<a href="/wiki/Kelvin_(eenheid)" title="Kelvin (eenheid)">K</a>) </th> <td colspan="2">2023 </td></tr> <tr> <th><a href="/wiki/Kookpunt" title="Kookpunt">Kookpunt</a> (K) </th> <td colspan="2">5000 </td></tr> <tr> <th><a href="/wiki/Aggregatietoestand" title="Aggregatietoestand">Aggregatietoestand</a> </th> <td colspan="2">Vast </td></tr> <tr> <th><a href="/wiki/Smeltwarmte" title="Smeltwarmte">Smeltwarmte</a> (kJ·mol<sup>−1</sup>) </th> <td colspan="2">19,2 </td></tr> <tr> <th><a href="/wiki/Verdampingswarmte" title="Verdampingswarmte">Verdampingswarmte</a> (kJ·mol<sup>−1</sup>) </th> <td colspan="2">525 </td></tr> <tr> <th><a href="/wiki/Kristalstructuur" title="Kristalstructuur">Kristalstructuur</a> </th> <td colspan="2">Kub </td></tr> <tr> <th><a href="/wiki/Molair_volume" title="Molair volume">Molair volume</a> (m<sup>3</sup>·mol<sup>−1</sup>) </th> <td colspan="2">19,80 · 10<sup>−6</sup> </td></tr> <tr> <th><a href="/wiki/Soortelijke_warmte" title="Soortelijke warmte">Specifieke warmte</a> (J·kg<sup>−1</sup>·K<sup>−1</sup>) </th> <td colspan="2">120 </td></tr> <tr> <th><a href="/wiki/Elektrische_weerstand_(eigenschap)" title="Elektrische weerstand (eigenschap)">Elektrische weerstand</a> (μ<a href="/wiki/Ohm_(eenheid)" title="Ohm (eenheid)">Ω</a>·<a href="/wiki/Centimeter" title="Centimeter">cm</a>) </th> <td colspan="2">13 </td></tr> <tr> <th><a href="/wiki/Warmteoverdracht" title="Warmteoverdracht">Warmtegeleiding</a> (<a href="/wiki/Watt_(eenheid)" title="Watt (eenheid)">W</a>·m<sup>−1</sup>·K<sup>−1</sup>) </th> <td colspan="2">54 </td></tr> <tr> <td class="ta-center" colspan="3"><small><a href="/wiki/SI-stelsel" title="SI-stelsel">SI</a>-eenheden en <a href="/wiki/Standaardomstandigheden" title="Standaardomstandigheden">standaardtemperatuur en -druk</a> worden gebruikt,<br />tenzij anders aangegeven</small> </td></tr> <tr> <td class="infobox-kop notheme center" style="background-color:#cedaf2; color:inherit;" colspan="3"> <table cellspacing="0" cellpadding="0"> <tbody><tr> <td style="vertical-align:middle;"><b>Portaal</b>  <span class="noviewer" typeof="mw:File"><a href="/wiki/Bestand:Portal.svg" class="mw-file-description" title="Portaalicoon"><img alt="Portaalicoon" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Portal.svg/22px-Portal.svg.png" decoding="async" width="22" height="20" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Portal.svg/33px-Portal.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Portal.svg/44px-Portal.svg.png 2x" data-file-width="36" data-file-height="32" /></a></span>   </td> <td class="ta-left"><b><a href="/wiki/Portaal:Scheikunde" title="Portaal:Scheikunde">Scheikunde</a> </b> </td></tr></tbody></table> </td></tr> </tbody></table> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Bestand:MonaziteUSGOV.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8e/MonaziteUSGOV.jpg/260px-MonaziteUSGOV.jpg" decoding="async" width="260" height="195" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/8/8e/MonaziteUSGOV.jpg 1.5x" data-file-width="360" data-file-height="270" /></a><figcaption><a href="/wiki/Monaziet" title="Monaziet">Monaziet</a>, een thoriumhoudend mineraal</figcaption></figure> <p><b>Thorium</b> is een <a href="/wiki/Chemisch_element" title="Chemisch element">scheikundig element</a> met symbool <b>Th</b> en <a href="/wiki/Atoomnummer" title="Atoomnummer">atoomnummer</a> 90. Het is een zilverwit <a href="/wiki/Actinide" title="Actinide">actinide</a>. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Bestand:Old_thorium_dioxide_gas_mantle_-_oblong_shape.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/93/Old_thorium_dioxide_gas_mantle_-_oblong_shape.JPG/260px-Old_thorium_dioxide_gas_mantle_-_oblong_shape.JPG" decoding="async" width="260" height="173" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/93/Old_thorium_dioxide_gas_mantle_-_oblong_shape.JPG/390px-Old_thorium_dioxide_gas_mantle_-_oblong_shape.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/93/Old_thorium_dioxide_gas_mantle_-_oblong_shape.JPG/520px-Old_thorium_dioxide_gas_mantle_-_oblong_shape.JPG 2x" data-file-width="1800" data-file-height="1200" /></a><figcaption>Een gaskousje met thoriumdioxide</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Bestand:Thorium_sample_0.1g.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/13/Thorium_sample_0.1g.jpg/260px-Thorium_sample_0.1g.jpg" decoding="async" width="260" height="173" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/13/Thorium_sample_0.1g.jpg/390px-Thorium_sample_0.1g.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/13/Thorium_sample_0.1g.jpg/520px-Thorium_sample_0.1g.jpg 2x" data-file-width="1000" data-file-height="667" /></a><figcaption>stukje van 0,1 g thorium in een glazen buisje met argon</figcaption></figure> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Ontdekking">Ontdekking</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Thorium&veaction=edit&section=1" title="Bewerk dit kopje: Ontdekking" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Thorium&action=edit&section=1" title="De broncode bewerken van de sectie: Ontdekking"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Thorium is in <a href="/wiki/1828" title="1828">1828</a> ontdekt door de <a href="/wiki/Zweden" title="Zweden">Zweedse</a> chemicus <a href="/wiki/J%C3%B6ns_Jacob_Berzelius" title="Jöns Jacob Berzelius">Jöns Jacob Berzelius</a>. Het element is vernoemd naar de <a href="/wiki/Noorwegen" title="Noorwegen">Noorse</a> god van de <a href="/wiki/Donder" title="Donder">donder</a>, <a href="/wiki/Thor" title="Thor">Thor</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Toepassingen">Toepassingen</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Thorium&veaction=edit&section=2" title="Bewerk dit kopje: Toepassingen" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Thorium&action=edit&section=2" title="De broncode bewerken van de sectie: Toepassingen"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>De eerste praktische toepassing van thorium was in <a href="/wiki/Gloeikousje" title="Gloeikousje">gaskousjes</a> in draagbare gaslampen, door <a href="/wiki/Carl_Auer_von_Welsbach" title="Carl Auer von Welsbach">Welsbach</a>, aan het einde van de <a href="/wiki/19e_eeuw" title="19e eeuw">19e eeuw</a>. Deze gaskousjes bestonden uit thoriumoxide plus 1% <a href="/wiki/Cerium(IV)oxide" title="Cerium(IV)oxide">ceriumoxide</a> en nog andere stoffen.<sup id="cite_ref-CRC_1-0" class="reference"><a href="#cite_note-CRC-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Daarna is de industriële toepasbaarheid gestaag toegenomen: </p> <ul><li>Als promotor bij de katalytische werking van <a href="/wiki/Koolstofmonoxide" title="Koolstofmonoxide">CO</a> wordt thoriumoxide gebruikt bij het <a href="/wiki/Fischer-Tropschbrandstoffen" title="Fischer-Tropschbrandstoffen">Fischer-Tropsch-proces</a>.</li> <li>Voor het coaten van <a href="/wiki/Wolfraam" title="Wolfraam">wolfraamdraden</a> in elektronische apparatuur.</li> <li>In <a href="/wiki/Legering" title="Legering">legeringen</a> met <a href="/wiki/Magnesium" title="Magnesium">magnesium</a> zorgt het voor verhoogde corrosiebestendigheid, sterkte en kruipbestendigheid bij hoge temperaturen.</li> <li>Als toevoeging aan <a href="/wiki/Glas" title="Glas">glas</a> zorgt thorium voor een hogere <a href="/wiki/Brekingsindex" title="Brekingsindex">brekingsindex</a> en wordt als zodanig toegepast in wetenschappelijke optische apparatuur.</li> <li>Als <a href="/wiki/Katalysator" title="Katalysator">katalysator</a> is thoriumoxide geschikt voor de productie van <a href="/wiki/Salpeterzuur" title="Salpeterzuur">salpeterzuur</a> en <a href="/wiki/Zwavelzuur" title="Zwavelzuur">zwavelzuur</a> en bij de raffinage van aardolie.</li> <li><a href="/wiki/Uranium-thoriumdatering" title="Uranium-thoriumdatering">Uranium-thoriumdatering</a> laat toe om de ouderdom van <a href="/wiki/Fossiel" title="Fossiel">fossielen</a> te bepalen.</li> <li>Als toevoeging aan de elektrode voor het <a href="/wiki/TIG-lassen" title="TIG-lassen">TIG-lassen</a>, waarmee betere laseigenschappen ontstonden. Heden ten dage zijn deze nagenoeg niet meer te verkrijgen wegens het stof dat vrijkomt tijdens het noodzakelijke slijpen van de elektrodes (met speciale afzuigingssystemen is het toegestaan).</li> <li>Thorium is ook een geschikt element voor de productie van nucleaire brandstof. In 2007 waren er in Noorwegen plannen voor het opstarten van een <a href="/wiki/Thoriumreactor" title="Thoriumreactor">thoriumreactor</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Opmerkelijke_eigenschappen">Opmerkelijke eigenschappen</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Thorium&veaction=edit&section=3" title="Bewerk dit kopje: Opmerkelijke eigenschappen" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Thorium&action=edit&section=3" title="De broncode bewerken van de sectie: Opmerkelijke eigenschappen"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Thorium zelf is een zacht, zilverwit metaal dat zich goed laat bewerken. Het is vrij stabiel aan de lucht. Het metaal zelf wordt niet veel toegepast. Van alle oxiden heeft <a href="/w/index.php?title=Thorium(IV)oxide&action=edit&redlink=1" class="new" title="Thorium(IV)oxide (de pagina bestaat niet)">thorium(IV)oxide</a> (ThO<sub>2</sub>) het hoogste smeltpunt (3300 °C). Bij een voldoende hoge temperatuur en aanwezigheid van <a href="/wiki/Dizuurstof" title="Dizuurstof">zuurstof</a> brandt thorium met een felle witte vlam. </p><p>Hoewel thorium tot de <a href="/wiki/Actiniden" class="mw-redirect" title="Actiniden">actiniden</a> gerekend wordt, is de elektronenconfiguratie [Rn]6d<sup>2</sup>7s<sup>2</sup> en niet [Rn]5f<sup>1</sup>7s<sup>2</sup>7p<sup>1</sup>. Het is dus zeker gerechtvaardigd ook een verband te zien met elementen als <a href="/wiki/Zirkonium" title="Zirkonium">zirkonium</a> en <a href="/wiki/Hafnium" title="Hafnium">hafnium</a>. Toen de verdere (<a href="/wiki/Transuraan_element" title="Transuraan element">transurane</a>) actiniden nog niet bekend waren werd het element ook meest onder hafnium in de <a href="/wiki/Titaangroep" title="Titaangroep">titaangroep</a> geplaatst. Het meest voorkomende oxidatiegetal is dan ook +IV (als Th<sup>4+</sup>), hoewel lagere oxidatietoestanden ook voorkomen. </p> <div class="mw-heading mw-heading2"><h2 id="Verschijning">Verschijning</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Thorium&veaction=edit&section=4" title="Bewerk dit kopje: Verschijning" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Thorium&action=edit&section=4" title="De broncode bewerken van de sectie: Verschijning"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In lage concentraties wordt thorium in veel gesteenten aangetroffen. De belangrijkste thoriumbronnen voor commerciële winning zijn de <a href="/wiki/Mineraal_(geologie)" title="Mineraal (geologie)">mineralen</a> <a href="/wiki/Thoriet" title="Thoriet">thoriet</a>, <a href="/w/index.php?title=Thorianiet&action=edit&redlink=1" class="new" title="Thorianiet (de pagina bestaat niet)">thorianiet</a> en <a href="/wiki/Monaziet" title="Monaziet">monaziet</a> die tot wel 12% thoriumoxide bevatten. Zowat de helft van de wereldreserves van 1,9 miljoen ton aan thorium bevinden zich in <a href="/wiki/India" title="India">India</a>, voor 35% in de deelstaat <a href="/wiki/Andhra_Pradesh" title="Andhra Pradesh">Andhra Pradesh</a>.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Ook de Verenigde Staten vooral in <a href="/wiki/Wyoming" title="Wyoming">Wyoming</a><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> en Australië bezitten aanzienlijke voorraden thorium in hun ondergrond.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>Bij de winning van <a href="/wiki/Zeldzame_aardmetalen" class="mw-redirect" title="Zeldzame aardmetalen">zeldzame aardmetalen</a> is thorium een van de afvalproducten. Ook op de maan en op Mars is thorium gevonden. </p> <div class="mw-heading mw-heading2"><h2 id="Isotopen">Isotopen</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Thorium&veaction=edit&section=5" title="Bewerk dit kopje: Isotopen" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Thorium&action=edit&section=5" title="De broncode bewerken van de sectie: Isotopen"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="hatnote" style="margin-bottom:0.5em; padding:0.5em 0 0.5em 1.6em; font-size:95%;" role="note"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ee/1rightarrow_blue.svg/15px-1rightarrow_blue.svg.png" decoding="async" width="15" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ee/1rightarrow_blue.svg/23px-1rightarrow_blue.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/ee/1rightarrow_blue.svg/30px-1rightarrow_blue.svg.png 2x" data-file-width="480" data-file-height="480" /></span></span> <i>Zie <a href="/wiki/Isotopen_van_thorium" title="Isotopen van thorium">Isotopen van thorium</a> voor het hoofdartikel over dit onderwerp.</i></div> <table class="wikitable" style="font-size:90%;"> <tbody><tr> <th colspan="6">Stabielste isotopen </th></tr> <tr> <th><a href="/wiki/Isotoop" title="Isotoop">Isotoop</a> </th> <th><a href="/wiki/Relatieve_aanwezigheid" title="Relatieve aanwezigheid">Relatieve aanwezigheid</a> (%) </th> <th><a href="/wiki/Halveringstijd" title="Halveringstijd">Halveringstijd</a> </th> <th><a href="/wiki/Vervalvorm" class="mw-redirect" title="Vervalvorm">Vervalvorm</a> </th> <th><a href="/wiki/Vervalenergie" title="Vervalenergie">Vervalenergie</a> (M<a href="/wiki/Elektronvolt" title="Elektronvolt">eV</a>) </th> <th><a href="/wiki/Vervalproduct" title="Vervalproduct">Vervalproduct</a> </th></tr> <tr> <td><sup>228</sup>Th </td> <td><a href="/wiki/Synthetische_radio-isotoop" title="Synthetische radio-isotoop">syn</a> </td> <td>1,9131 <a href="/wiki/Jaar" title="Jaar">j</a> </td> <td><a href="/wiki/Alfastraling" title="Alfastraling">α</a> </td> <td>5,520 </td> <td><sup>224</sup>Ra </td></tr> <tr> <td><sup>229</sup>Th </td> <td><a href="/wiki/Synthetische_radio-isotoop" title="Synthetische radio-isotoop">syn</a> </td> <td>7880 <a href="/wiki/Jaar" title="Jaar">j</a> </td> <td><a href="/wiki/Alfastraling" title="Alfastraling">α</a> </td> <td>5,168 </td> <td><sup>225</sup>Ra </td></tr> <tr> <td><sup>230</sup>Th </td> <td><a href="/wiki/Synthetische_radio-isotoop" title="Synthetische radio-isotoop">syn</a> </td> <td>7,538·10<sup>4</sup> <a href="/wiki/Jaar" title="Jaar">j</a> </td> <td><a href="/wiki/Alfastraling" title="Alfastraling">α</a> </td> <td>4,770 </td> <td><sup>226</sup>Ra </td></tr> <tr> <td><sup>232</sup>Th </td> <td>100 </td> <td>1,405·10<sup>10</sup> <a href="/wiki/Jaar" title="Jaar">j</a> </td> <td><a href="/wiki/Alfastraling" title="Alfastraling">α</a> </td> <td>4,083 </td> <td><sup>228</sup>Ra </td></tr></tbody></table> <p>Hoewel er van thorium geen stabiele isotopen bestaan, zijn er wel enkele met een dusdanige lange <a href="/wiki/Halveringstijd" title="Halveringstijd">halveringstijd</a>, dat ze bij benadering als stabiel kunnen worden beschouwd. <sup>232</sup>Th heeft een halveringstijd van 1,405·10<sup>10</sup> jaar en komt van nature voor. </p><p>De Canadese fysicus <a href="/wiki/Harriet_Brooks" title="Harriet Brooks">Harriet Brooks</a> ontdekte rond 1901 dat bij het <a href="/wiki/Radioactief_verval" title="Radioactief verval">radioactief verval</a> van thorium een gas vrijkomt met een lagere atoommassa. Dit bleek later het element <a href="/wiki/Radon" class="mw-disambig" title="Radon">radon</a>-222 te zijn. </p> <div class="mw-heading mw-heading2"><h2 id="Thorium_als_kernbrandstof">Thorium als kernbrandstof</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Thorium&veaction=edit&section=6" title="Bewerk dit kopje: Thorium als kernbrandstof" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Thorium&action=edit&section=6" title="De broncode bewerken van de sectie: Thorium als kernbrandstof"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Thorium kan, net als <a href="/wiki/Uranium" title="Uranium">uranium</a> en <a href="/wiki/Plutonium" title="Plutonium">plutonium</a>, worden gebruikt als brandstof in een <a href="/wiki/Thoriumreactor" title="Thoriumreactor">kernreactor</a>. Hoewel het zelf niet splijtbaar is, kan het na absorptie van langzame neutronen de uraniumisotoop <a href="/wiki/Uranium-233" title="Uranium-233"><sup>233</sup>U</a> vormen, die wel splijtbaar is (vergelijkbaar met <a href="/wiki/Uranium-238" title="Uranium-238"><sup>238</sup>U</a> dat kan worden opgekweekt tot het splijtbare <a href="/wiki/Plutonium-238" title="Plutonium-238"><sup>239</sup>Pu</a>). <sup>233</sup>U levert bij splijting meer neutronen per geabsorbeerd neutron dan het in de meeste kerncentrales gebruikte <a href="/wiki/Uranium-235" title="Uranium-235"><sup>235</sup>U</a> en <a href="/wiki/Plutonium-239" title="Plutonium-239"><sup>239</sup>Pu</a>. Dit maakt dit <a href="/wiki/Kweekreactor" title="Kweekreactor">kweekproces</a> efficiënter dan de gangbare methoden. </p><p>Het kweekproces verloopt meer in detail als volgt: het <a href="/wiki/Thorium-232" title="Thorium-232"><sup>232</sup>Th</a> absorbeert een neutron onder vorming van <a href="/wiki/Thorium-233" title="Thorium-233"><sup>233</sup>Th</a>. Door <a href="/wiki/B%C3%A8taverval" title="Bètaverval">bètaverval</a> (halveringstijd 22,3 min) gaat <sup>233</sup>Th over in <a href="/wiki/Protactinium-233" title="Protactinium-233">protactinium-233</a> (<sup>233</sup>Pa), dat op zijn beurt opnieuw door bètaverval (halveringstijd 26,967 dag) overgaat in <a href="/wiki/Uranium-233" title="Uranium-233"><sup>233</sup>U</a>: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\ce {^{1}_{0}n\,+_{90}^{232}Th->_{90}^{233}Th->_{91}^{233}Pa\,+_{-1}^{0}e^{-}\,+{\bar {\nu }}_{e}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mmultiscripts> <mtext>n</mtext> <none /> <none /> <mprescripts /> <mn>0</mn> <mn>1</mn> </mmultiscripts> <mspace width="thinmathspace" /> <msubsup> <mo>+</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>90</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>232</mn> </mrow> </msubsup> <mtext>Th</mtext> <msubsup> <mo stretchy="false">⟶</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>90</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>233</mn> </mrow> </msubsup> <mtext>Th</mtext> <msubsup> <mo stretchy="false">⟶</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>91</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>233</mn> </mrow> </msubsup> <mtext>Pa</mtext> <mspace width="thinmathspace" /> <msubsup> <mo>+</mo> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>1</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> </msubsup> <msup> <mtext>e</mtext> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> </mrow> </msup> <mspace width="thinmathspace" /> <mo>+</mo> <msubsup> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>ν</mi> <mo stretchy="false">¯</mo> </mover> </mrow> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mtext>e</mtext> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mspace width="0pt" height="0pt" depth=".2em" /> </mrow> </msubsup> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\ce {^{1}_{0}n\,+_{90}^{232}Th->_{90}^{233}Th->_{91}^{233}Pa\,+_{-1}^{0}e^{-}\,+{\bar {\nu }}_{e}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/8ecd05f3760f8c7fdd9292d4159da5e6dfc8e9f2" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.171ex; width:46.099ex; height:3.343ex;" alt="{\displaystyle {\ce {^{1}_{0}n\,+_{90}^{232}Th->_{90}^{233}Th->_{91}^{233}Pa\,+_{-1}^{0}e^{-}\,+{\bar {\nu }}_{e}}}}"></span></dd> <dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\ce {^{233}_{91}Pa->_{92}^{233}U\,+_{-1}^{0}e^{-}\,+{\bar {\nu }}_{e}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mmultiscripts> <mtext>Pa</mtext> <none /> <none /> <mprescripts /> <mn>91</mn> <mn>233</mn> </mmultiscripts> <msubsup> <mo stretchy="false">⟶</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>92</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>233</mn> </mrow> </msubsup> <mtext>U</mtext> <mspace width="thinmathspace" /> <msubsup> <mo>+</mo> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>1</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> </msubsup> <msup> <mtext>e</mtext> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> </mrow> </msup> <mspace width="thinmathspace" /> <mo>+</mo> <msubsup> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mover> <mi>ν</mi> <mo stretchy="false">¯</mo> </mover> </mrow> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mtext>e</mtext> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mspace width="0pt" height="0pt" depth=".2em" /> </mrow> </msubsup> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\ce {^{233}_{91}Pa->_{92}^{233}U\,+_{-1}^{0}e^{-}\,+{\bar {\nu }}_{e}}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/66eda8de975647f7b67e62f32511e028b5f1a564" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.171ex; width:28.532ex; height:3.509ex;" alt="{\displaystyle {\ce {^{233}_{91}Pa->_{92}^{233}U\,+_{-1}^{0}e^{-}\,+{\bar {\nu }}_{e}}}}"></span></dd></dl> <p>Het reactieproduct wordt vervolgens buiten de reactor gescheiden: de <sup>233</sup>U kan relatief eenvoudig (want langs chemische weg) worden gescheiden van de thorium, en aan de volgende reactor worden toegevoerd. </p><p>Het beschreven productieproces heeft wel nadelen: de fractie met <sup>233</sup>U is hoogradioactief door verontreiniging met het kortlevende <sup>232</sup>U en daardoor lastig te hanteren, wat de methode duurder maakt. Bij het hergebruiken van de thoriumfractie is er een soortgelijk probleem met het hoogradioactieve <sup>228</sup>Th. Verder is er enig gevaar dat <sup>233</sup>U in kernwapens zou kunnen worden gebruikt. Ten slotte zijn er nog technische problemen die nog niet geheel zijn opgelost. Er is nog veel ontwikkelwerk te doen voordat tot commerciële toepassing kan worden overgegaan, maar zolang (en waar) er nog voldoende uranium beschikbaar is lijkt het onwaarschijnlijk dat daarvoor voldoende geld beschikbaar zal worden gesteld. </p><p>Toch zijn er op de lange termijn kansen voor toepassing van de thoriumcyclus: thorium is aanzienlijk ruimer voorhanden dan uranium en het is bijzonder geschikt om te worden toegepast in <a href="/wiki/Gesmoltenzoutreactor" title="Gesmoltenzoutreactor">gesmoltenzoutreactoren</a>. </p><p>Een van de eerste experimenten met de thoriumcyclus werd uitgevoerd in het <a href="/wiki/Oak_Ridge_National_Laboratory" title="Oak Ridge National Laboratory">Oak Ridge National Laboratory</a> te <a href="/wiki/Oak_Ridge_(Tennessee)" title="Oak Ridge (Tennessee)">Oak Ridge (Tennessee)</a> in de <a href="/wiki/1960-1969" title="1960-1969">zestiger jaren</a>. Het programma werd echter in 1976 gestopt vanwege gebrek aan geld. In reactors zoals de Canadese <a href="/wiki/CANDU-reactor" title="CANDU-reactor">CANDU-6</a> wordt thorium reeds gebruikt in combinatie met <a href="/wiki/Plutonium-239" title="Plutonium-239">plutonium-239</a>. In 2007 overwoog men in <a href="/wiki/Noorwegen" title="Noorwegen">Noorwegen</a> zich voor energie-opwekking op thoriuminstallaties te richten, onder meer vanwege de ruime beschikbaarheid van thoriumerts in dat land. </p><p>In 2024 moet in India het <a href="/w/index.php?title=Prototype_Fast_Breeder_Reactor&action=edit&redlink=1" class="new" title="Prototype Fast Breeder Reactor (de pagina bestaat niet)">Prototype Fast Breeder Reactor</a><span class="noprint" style="font-size:85%; font-style: normal;"> [<a href="https://en.wikipedia.org/wiki/Prototype_Fast_Breeder_Reactor" class="extiw" title="en:Prototype Fast Breeder Reactor">en</a>]</span> (PFBR) met een vermogen van 500 MW gereed zijn. In de mantel wordt thorium gebruikt, om uiteindelijk <sup>233</sup>U te produceren.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Toxicologie_en_veiligheid">Toxicologie en veiligheid</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Thorium&veaction=edit&section=7" title="Bewerk dit kopje: Toxicologie en veiligheid" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Thorium&action=edit&section=7" title="De broncode bewerken van de sectie: Toxicologie en veiligheid"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Hoewel thorium zelf niet erg radioactief is, zijn veel vervalproducten van thorium dat wel. Het vervalt in 6 <a href="/wiki/Alfastraling" title="Alfastraling">alfa</a>- en 4 <a href="/wiki/B%C3%A8tastraling" title="Bètastraling">bètastappen</a> tot <sup>208</sup>Pb (de <a href="/wiki/Thoriumreeks" title="Thoriumreeks">thoriumreeks</a>) en onderweg vormt het onder andere het edelgas <sup>220</sup>Rn dat gevaar voor besmetting oplevert. </p><p>Het grootste gezondheidsgevaar van thorium is echter de stof zelf: de alfastraling kan de huid niet doordringen, maar bij inname hoopt ze zich op in de <a href="/wiki/Lever" title="Lever">lever</a>, <a href="/wiki/Milt" title="Milt">milt</a>, <a href="/wiki/Lymfe" title="Lymfe">lymfeknopen</a> en <a href="/wiki/Bot_(anatomie)" title="Bot (anatomie)">botten</a>. De 'biologische halveringstijd' van thorium is ongeveer 22 jaar, wat in de praktijk betekent dat de alfastraling gedurende de rest van het leven schade toebrengt en daarbij de kans op <a href="/wiki/Leverkanker" title="Leverkanker">leverkanker</a> en <a href="/wiki/Leukemie" title="Leukemie">leukemie</a> verhoogt. </p> <div class="mw-heading mw-heading2"><h2 id="Externe_links">Externe links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Thorium&veaction=edit&section=8" title="Bewerk dit kopje: Externe links" class="mw-editsection-visualeditor"><span>bewerken</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Thorium&action=edit&section=8" title="De broncode bewerken van de sectie: Externe links"><span>brontekst bewerken</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20160306175633/http://itheo.org/">International Thorium Energy Organisation - www.IThEO.org</a></li> <li class="mw-empty-elt"></li> <li><a rel="nofollow" class="external text" href="http://www.lenntech.nl/periodiek/elementen/Th.htm"><i>Lenntech.nl</i> - thorium</a></li> <li><style data-mw-deduplicate="TemplateStyles:r67679320">.mw-parser-output .taalaanduiding{font-family:sans-serif;font-size:85%;cursor:help;color:var(--color-subtle,#555)}.mw-parser-output .taalaanduiding span{border-bottom:1px dotted var(--color-subtle,#555)}</style><span class="taalaanduiding" title="Taal: Engels">(<span>en</span>) </span><a rel="nofollow" class="external text" href="http://environmentalchemistry.com/yogi/periodic/Th.html"><i>EnvironmentalChemistry.com</i> - thorium</a></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r67679320"><span class="taalaanduiding" title="Taal: Engels">(<span>en</span>) </span><a rel="nofollow" class="external text" href="http://www.webelements.com/webelements/elements/text/Th/index.html"><i>WebElements.com</i> - thorium</a></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r67679320"><span class="taalaanduiding" title="Taal: Engels">(<span>en</span>) </span> <a rel="nofollow" class="external text" href="http://www-pub.iaea.org/mtcd/publications/pdf/te_1450_web.pdf">Thorium fuel cycle - Potential benefits and challenges</a>, International Atomic Energy Agency</li></ul> <div class="toccolours appendix" role="presentation" style="font-size:90%; margin:1em 0 -0.5em; clear:both;"> <div><span style="font-weight:bold">Bronnen, noten en/of referenties</span></div> <div class="reflist" style="list-style-type: decimal;"><div class="mw-references-wrap"><ol class="references"> <li id="cite_note-CRC-1"><span class="mw-cite-backlink"><a href="#cite_ref-CRC_1-0">↑</a></span> <span class="reference-text"><span class="citation" id="CITEREF1978_B-37"><cite><i><a rel="nofollow" class="external text" href="https://archive.org/details/crchandbookofche00clev">CRC Handbook of Chemistry and Physics</a></i></cite>, 56. CRC Press (1978), B-37. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20210507032442/https://archive.org/details/crchandbookofche00clev">Gearchiveerd</a> op <span class="mw-formatted-date" title="2021-05-07">7 mei 2021</span>.</span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external free" href="http://www.business-standard.com/article/pti-stories/over-1-25-mt-thorium-reserve-found-in-3-years-113081400960_1.html">http://www.business-standard.com/article/pti-stories/over-1-25-mt-thorium-reserve-found-in-3-years-113081400960_1.html</a></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external free" href="https://www.scribd.com/doc/105448071/Thorium-Resources-in-Rare-Earth-Elements-Ragheb-M-Aug-2011">http://www.scribd.com/doc/105448071/Thorium-Resources-in-Rare-Earth-Elements-Ragheb-M-Aug-2011</a></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external free" href="https://minerals.usgs.gov/minerals/pubs/commodity/thorium/mcs-2014-thori.pdf">http://minerals.usgs.gov/minerals/pubs/commodity/thorium/mcs-2014-thori.pdf</a></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external free" href="http://www.aesj.or.jp/~recycle/gl2005pr1-4mr.sokolov.pdf">http://www.aesj.or.jp/~recycle/gl2005pr1-4mr.sokolov.pdf</a></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><a href="#cite_ref-6">↑</a></span> <span class="reference-text"><span class="citation"><a rel="nofollow" class="external text" href="https://www.world-nuclear-news.org/Articles/India-gives-update-on-nuclear-construction-project">India gives update on nuclear construction projects : New Nuclear - World Nuclear News</a>. <i>www.world-nuclear-news.org</i>. Geraadpleegd op <span class="mw-formatted-date" title="2023-04-27">27 april 2023</span>. </span></span> </li> </ol></div></div> </div> <div class="interProject commons mw-list-item" style="display:none;"><a href="https://commons.wikimedia.org/wiki/Category:Thorium#mw-subcategories" class="extiw" title="commons:Category:Thorium">Mediabestanden</a></div> <div class="interProjectTemplate interProject-groot toccolours" style="display:flex; gap:1em; align-items:center; clear:both; margin:1em 0 -0.5em 0;"> <div style="min-width:max-content;"><span class="noviewer noresize" typeof="mw:File"><a href="/wiki/Bestand:Commons-logo.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/25px-Commons-logo.svg.png" decoding="async" width="25" height="34" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/38px-Commons-logo.svg.png 1.5x, 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title="Nobelium">nobelium</a> · <a href="/wiki/Lawrencium" title="Lawrencium">lawrencium</a> </p> </div></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r67837862"> <div class="navigatie" role="navigation" aria-labelledby="Chemische_elementen_en_isotopen"> <div class="navigatie-afb-links noviewer"><div class="navigatie-bewerken show-autoconfirmed nomobile"><span class="nowrap skin-invert-image"><span typeof="mw:File"><a href="/wiki/Sjabloon:Navigatie_elementen" title="Sjabloon:Navigatie elementen"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c4/OOjs_UI_icon_article-ltr.svg/16px-OOjs_UI_icon_article-ltr.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c4/OOjs_UI_icon_article-ltr.svg/24px-OOjs_UI_icon_article-ltr.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c4/OOjs_UI_icon_article-ltr.svg/32px-OOjs_UI_icon_article-ltr.svg.png 2x" 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src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr.svg/16px-OOjs_UI_icon_edit-ltr.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr.svg/24px-OOjs_UI_icon_edit-ltr.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr.svg/32px-OOjs_UI_icon_edit-ltr.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span></div></div> <div id="Chemische_elementen_en_isotopen" class="navigatie-titel"><a href="/wiki/Scheikunde" title="Scheikunde">Chemische</a> elementen en isotopen</div> <div class="navigatie-inhoud"> <style data-mw-deduplicate="TemplateStyles:r67785531">.mw-parser-output .navigatie-tabel{margin:0 auto 0 auto;text-align:left}.mw-parser-output .navigatie-tabel .links{text-align:right}.mw-parser-output .navigatie-tabel .rechts{padding-left:0.5em}@media screen and (max-width:640px){.mw-parser-output .navigatie-tabel tr{display:grid;grid-template-columns:1fr;width:100%;margin-bottom:0.5em}.mw-parser-output .navigatie-tabel tr:last-of-type{margin-bottom:0}.mw-parser-output .navigatie-tabel .links{text-align:unset}.mw-parser-output .navigatie-tabel .rechts{padding:unset}}</style><table class="navigatie-tabel vatop" cellpadding="0" cellspacing="0" style=""><tbody><tr><td class="links" style=""><b>Periodiek systeem:</b></td><td class="rechts"><a href="/wiki/Periodiek_systeem" title="Periodiek systeem">standaard</a> · <a href="/wiki/Periodiek_systeem/Alternatieve_tabel" title="Periodiek systeem/Alternatieve tabel">alternatief</a> · <a href="/wiki/Periodiek_systeem/Elektronenconfiguratie" title="Periodiek systeem/Elektronenconfiguratie">elektronenconfiguratie</a> · <a href="/wiki/Ezelsbruggetje#Scheikunde" title="Ezelsbruggetje">ezelsbruggetje eerste 20 elementen</a> · <a href="/wiki/Geschiedenis_van_het_periodiek_systeem" title="Geschiedenis van het periodiek systeem">geschiedenis</a></td></tr><tr><td class="links"><b>Isotopentabel:</b></td><td class="rechts"><a href="/wiki/Isotopentabel" title="Isotopentabel">op element (compleet</a> <a href="/wiki/Isotopentabel_(in_delen)" title="Isotopentabel (in delen)">/ in delen)</a> · <a href="/wiki/Isotopenkaart" title="Isotopenkaart">op atoommassa</a></td></tr><tr><td class="links"><b>Zie ook:</b></td><td class="rechts"><a href="/wiki/Lijst_van_chemische_elementen" title="Lijst van chemische elementen">lijst van chemische elementen</a> · <a href="/wiki/Abundantie_(scheikunde)" title="Abundantie (scheikunde)">abundantie</a></td></tr></tbody></table> </div></div> <div class="interProject wiktionary mw-list-item" style="display:none;"><a href="https://nl.wiktionary.org/wiki/Special:Search/thorium" class="extiw" title="wikt:Special:Search/thorium">WikiWoordenboek</a></div><div class="interProjectTemplate"></div>    </div><noscript><img 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