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class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Hydrogen-1 (protium)</span> </div> </a> <ul id="toc-Hydrogen-1_(protium)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Hydrogen-2_(deuterium)" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Hydrogen-2_(deuterium)"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Hydrogen-2 (deuterium)</span> </div> </a> <ul id="toc-Hydrogen-2_(deuterium)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Hydrogen-3_(tritium)" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Hydrogen-3_(tritium)"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Hydrogen-3 (tritium)</span> </div> </a> <ul id="toc-Hydrogen-3_(tritium)-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Hydrogen-4" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Hydrogen-4"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Hydrogen-4</span> </div> </a> <ul id="toc-Hydrogen-4-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Hydrogen-5" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Hydrogen-5"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Hydrogen-5</span> </div> </a> <ul id="toc-Hydrogen-5-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Hydrogen-6" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Hydrogen-6"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Hydrogen-6</span> </div> </a> <ul id="toc-Hydrogen-6-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Hydrogen-7" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Hydrogen-7"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Hydrogen-7</span> </div> </a> <ul id="toc-Hydrogen-7-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Decay_chains" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Decay_chains"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Decay chains</span> </div> </a> <ul id="toc-Decay_chains-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes"> <div class="vector-toc-text"> <span class="vector-toc-numb">11</span> <span>Notes</span> </div> </a> <ul id="toc-Notes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">12</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Further_reading" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Further_reading"> <div class="vector-toc-text"> <span class="vector-toc-numb">13</span> <span>Further reading</span> </div> </a> <ul id="toc-Further_reading-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 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</div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Isotopes of hydrogen</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="Go to an article in another language. Available in 39 languages" > <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-39" 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">39 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%86%D8%B8%D8%A7%D8%A6%D8%B1_%D8%A7%D9%84%D9%87%D9%8A%D8%AF%D8%B1%D9%88%D8%AC%D9%8A%D9%86" title="نظائر الهيدروجين – Arabic" lang="ar" hreflang="ar" data-title="نظائر الهيدروجين" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Is%C3%B3topos_del_hidr%C3%B3xenu" title="Isótopos del hidróxenu – Asturian" lang="ast" hreflang="ast" data-title="Isótopos del hidróxenu" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%B9%E0%A6%BE%E0%A6%87%E0%A6%A1%E0%A7%8D%E0%A6%B0%E0%A7%8B%E0%A6%9C%E0%A7%87%E0%A6%A8_%E0%A6%86%E0%A6%87%E0%A6%B8%E0%A7%8B%E0%A6%9F%E0%A7%8B%E0%A6%AA%E0%A6%B8%E0%A6%AE%E0%A7%82%E0%A6%B9" title="হাইড্রোজেন আইসোটোপসমূহ – Bangla" lang="bn" hreflang="bn" data-title="হাইড্রোজেন আইসোটোপসমূহ" data-language-autonym="বাংলা" data-language-local-name="Bangla" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Is%C3%B2tops_de_l%27hidrogen" title="Isòtops de l'hidrogen – Catalan" lang="ca" hreflang="ca" data-title="Isòtops de l'hidrogen" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%92%D0%BE%D0%B4%D0%BE%D1%80%D0%BE%D0%B4_%D0%B8%D0%B7%D0%BE%D1%82%D0%BE%D0%BF%C4%95%D1%81%D0%B5%D0%BC" title="Водород изотопĕсем – Chuvash" lang="cv" hreflang="cv" data-title="Водород изотопĕсем" data-language-autonym="Чӑвашла" data-language-local-name="Chuvash" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Izotopy_vod%C3%ADku" title="Izotopy vodíku – Czech" lang="cs" hreflang="cs" data-title="Izotopy vodíku" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Vesiniku_isotoobid" title="Vesiniku isotoobid – Estonian" lang="et" hreflang="et" data-title="Vesiniku isotoobid" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Anexo:Is%C3%B3topos_de_hidr%C3%B3geno" title="Anexo:Isótopos de hidrógeno – Spanish" lang="es" hreflang="es" data-title="Anexo:Isótopos de hidrógeno" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Izotopoj_de_hidrogeno" title="Izotopoj de hidrogeno – Esperanto" lang="eo" hreflang="eo" data-title="Izotopoj de hidrogeno" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Hidrogeno_isotopoak" title="Hidrogeno isotopoak – Basque" lang="eu" hreflang="eu" data-title="Hidrogeno isotopoak" data-language-autonym="Euskara" data-language-local-name="Basque" 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%A7%DB%8C%D8%B2%D9%88%D8%AA%D9%88%D9%BE%E2%80%8C%D9%87%D8%A7%DB%8C_%D9%87%DB%8C%D8%AF%D8%B1%D9%88%DA%98%D9%86" title="ایزوتوپ‌های هیدروژن – Persian" lang="fa" hreflang="fa" data-title="ایزوتوپ‌های هیدروژن" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Isotopes_de_l%27hydrog%C3%A8ne" title="Isotopes de l'hydrogène – French" lang="fr" hreflang="fr" data-title="Isotopes de l'hydrogène" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%88%98%EC%86%8C_%EB%8F%99%EC%9C%84_%EC%9B%90%EC%86%8C" title="수소 동위 원소 – Korean" lang="ko" hreflang="ko" data-title="수소 동위 원소" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%8B%D6%80%D5%A1%D5%AE%D5%B6%D5%AB_%D5%AB%D5%A6%D5%B8%D5%BF%D5%B8%D5%BA%D5%B6%D5%A5%D6%80" title="Ջրածնի իզոտոպներ – Armenian" lang="hy" hreflang="hy" data-title="Ջրածնի իզոտոպներ" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B9%E0%A4%BE%E0%A4%87%E0%A4%A1%E0%A5%8D%E0%A4%B0%E0%A5%8B%E0%A4%9C%E0%A4%A8_%E0%A4%95%E0%A5%87_%E0%A4%B8%E0%A4%AE%E0%A4%B8%E0%A5%8D%E0%A4%A5%E0%A4%BE%E0%A4%A8%E0%A4%BF%E0%A4%95" title="हाइड्रोजन के समस्थानिक – Hindi" lang="hi" hreflang="hi" data-title="हाइड्रोजन के समस्थानिक" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Isotop_hidrogen" title="Isotop hidrogen – Indonesian" lang="id" hreflang="id" data-title="Isotop hidrogen" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Vetnissams%C3%A6tur" title="Vetnissamsætur – Icelandic" lang="is" hreflang="is" data-title="Vetnissamsætur" data-language-autonym="Íslenska" data-language-local-name="Icelandic" 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/Isotopi_dell%27idrogeno" title="Isotopi dell'idrogeno – Italian" lang="it" hreflang="it" data-title="Isotopi dell'idrogeno" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/A_hidrog%C3%A9n_izot%C3%B3pjai" title="A hidrogén izotópjai – Hungarian" lang="hu" hreflang="hu" data-title="A hidrogén izotópjai" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Isotop_hidrogen" title="Isotop hidrogen – Malay" lang="ms" hreflang="ms" data-title="Isotop hidrogen" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Isotopen_van_waterstof" title="Isotopen van waterstof – Dutch" lang="nl" hreflang="nl" data-title="Isotopen van waterstof" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E6%B0%B4%E7%B4%A0%E3%81%AE%E5%90%8C%E4%BD%8D%E4%BD%93" title="水素の同位体 – Japanese" lang="ja" hreflang="ja" data-title="水素の同位体" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Hydrogenisotoper" title="Hydrogenisotoper – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Hydrogenisotoper" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%B9%E0%A8%BE%E0%A8%88%E0%A8%A1%E0%A9%8D%E0%A8%B0%E0%A9%8B%E0%A8%9C%E0%A8%A8_%E0%A8%A6%E0%A9%87_%E0%A8%86%E0%A8%88%E0%A8%B8%E0%A9%8B%E0%A8%9F%E0%A9%8B%E0%A8%AA" title="ਹਾਈਡ੍ਰੋਜਨ ਦੇ ਆਈਸੋਟੋਪ – Punjabi" lang="pa" hreflang="pa" data-title="ਹਾਈਡ੍ਰੋਜਨ ਦੇ ਆਈਸੋਟੋਪ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="Punjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Izotopy_wodoru" title="Izotopy wodoru – Polish" lang="pl" hreflang="pl" data-title="Izotopy wodoru" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Is%C3%B3topos_do_hidrog%C3%A9nio" title="Isótopos do hidrogénio – Portuguese" lang="pt" hreflang="pt" data-title="Isótopos do hidrogénio" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%98%D0%B7%D0%BE%D1%82%D0%BE%D0%BF%D1%8B_%D0%B2%D0%BE%D0%B4%D0%BE%D1%80%D0%BE%D0%B4%D0%B0" title="Изотопы водорода – Russian" lang="ru" hreflang="ru" data-title="Изотопы водорода" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Isotopes_of_hydrogen" title="Isotopes of hydrogen – Simple English" lang="en-simple" hreflang="en-simple" data-title="Isotopes of hydrogen" 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-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Izotopi_vodika" title="Izotopi vodika – Slovenian" lang="sl" hreflang="sl" data-title="Izotopi vodika" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%98%D0%B7%D0%BE%D1%82%D0%BE%D0%BF%D0%B8_%D0%B2%D0%BE%D0%B4%D0%BE%D0%BD%D0%B8%D0%BA%D0%B0" title="Изотопи водоника – Serbian" lang="sr" hreflang="sr" data-title="Изотопи водоника" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Vedyn_isotoopit" title="Vedyn isotoopit – Finnish" lang="fi" hreflang="fi" data-title="Vedyn isotoopit" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/V%C3%A4teisotoper" title="Väteisotoper – Swedish" lang="sv" hreflang="sv" data-title="Väteisotoper" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%84%E0%B8%AD%E0%B9%82%E0%B8%8B%E0%B9%82%E0%B8%97%E0%B8%9B%E0%B8%82%E0%B8%AD%E0%B8%87%E0%B9%84%E0%B8%AE%E0%B9%82%E0%B8%94%E0%B8%A3%E0%B9%80%E0%B8%88%E0%B8%99" title="ไอโซโทปของไฮโดรเจน – Thai" lang="th" hreflang="th" data-title="ไอโซโทปของไฮโดรเจน" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Hidrojen_izotoplar%C4%B1" title="Hidrojen izotopları – Turkish" lang="tr" hreflang="tr" data-title="Hidrojen izotopları" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%86%D0%B7%D0%BE%D1%82%D0%BE%D0%BF%D0%B8_%D0%B2%D0%BE%D0%B4%D0%BD%D1%8E" title="Ізотопи водню – Ukrainian" lang="uk" hreflang="uk" 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.mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox"><caption class="infobox-title"><span class="nowrap"><a href="/wiki/Isotope" title="Isotope">Isotopes</a> of <a href="/wiki/Hydrogen" title="Hydrogen">hydrogen</a> <style data-mw-deduplicate="TemplateStyles:r886047488">.mw-parser-output .nobold{font-weight:normal}</style><span class="nobold">(<sub>1</sub>H)</span></span></caption><tbody><tr><td colspan="2" class="infobox-full-data"> <table class="wikitable" style="text-align: center; vertical-align: middle; width: 100%; border-collapse: collapse; margin: 0; padding: 0;"> <tbody><tr> <th colspan="3">Main isotopes </th> <th colspan="2"><a href="/wiki/Radioactive_decay" title="Radioactive decay">Decay</a> </th></tr> <tr> <th> </th> <th style="padding: 0.1em;"><a href="/wiki/Natural_abundance" title="Natural abundance">abundance</a> </th> <th style="padding: 0.1em;"><a href="/wiki/Half-life" title="Half-life">half-life</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886047488"><span class="nobold">(<i>t</i><sub>1/2</sub>)</span> </th> <th style="padding: 0.1em;"><a href="/wiki/Radioactive_decay#Types_of_decay" title="Radioactive decay">mode</a> </th> <th style="padding: 0.1em;"><a href="/wiki/Decay_product" title="Decay product">product</a> </th></tr> <tr> <th rowspan="1" style="vertical-align: top;"><sup>1</sup>H </th> <td rowspan="1" colspan="1" style="vertical-align: top; text-align: right;"><span class="nowrap"><span data-sort-value="6999999855000000000♠"></span>99.9855%</span> </td> <td rowspan="1" colspan="3" style="vertical-align: top; text-align: left;"><a href="/wiki/Stable_isotope" class="mw-redirect" title="Stable isotope">stable</a> </td></tr> <tr> <th rowspan="1" style="vertical-align: top;"><a href="/wiki/Deuterium" title="Deuterium"><sup>2</sup>H</a> </th> <td rowspan="1" colspan="1" style="vertical-align: top; text-align: right;"><span class="nowrap"><span data-sort-value="6996145000000000000♠"></span>0.0145%</span> </td> <td rowspan="1" colspan="3" style="vertical-align: top; text-align: left;">stable </td></tr> <tr> <th rowspan="1" style="vertical-align: top;"><a href="/wiki/Tritium" title="Tritium"><sup>3</sup>H</a> </th> <td rowspan="1" colspan="1" style="vertical-align: top; text-align: center;"><a href="/wiki/Trace_radioisotope" title="Trace radioisotope">trace</a> </td> <td rowspan="1" colspan="1" style="vertical-align: top; text-align: right;"><span class="nowrap"><span data-sort-value="7008388789632000000♠"></span>12.32 y</span> </td> <td style="text-align: left; vertical-align: top;"><span style="float: left; font-size: 115%; padding: 0;"><a href="/wiki/Beta_minus_decay" class="mw-redirect" title="Beta minus decay">β<sup>−</sup></a></span><span style="float: right; padding-left: 0.2em;"></span> </td> <td style="text-align: right; vertical-align: middle;"><a href="/wiki/Helium-3" title="Helium-3"><sup>3</sup>He</a> </td></tr></tbody></table></td></tr><tr><th colspan="2" class="infobox-header" style="background: #e0e0e0;"><a href="/wiki/Standard_atomic_weight" title="Standard atomic weight">Standard atomic weight</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886047488"><span class="nobold"><i>A</i><sub>r</sub>°(H)</span></th></tr><tr><th scope="row" class="infobox-label"></th><td class="infobox-data"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"><ul><li>[<span class="nowrap"><span data-sort-value="7000100784000000000♠"></span>1.007<span style="margin-left:.25em;">84</span></span>, <span class="nowrap"><span data-sort-value="7000100811000000000♠"></span>1.008<span style="margin-left:.25em;">11</span></span>]<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></li><li><span class="nowrap"><span data-sort-value="7000100800000000000♠"></span>1.0080<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.0002</span> (<a href="/wiki/Standard_atomic_weight#Abridged_atomic_weight" title="Standard atomic weight">abridged</a>)<sup id="cite_ref-CIAAW2021_2-0" class="reference"><a href="#cite_note-CIAAW2021-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></li></ul></div></td></tr><tr><td colspan="2" class="infobox-below noprint" style="background: #e8e8e8;"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist 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<p><a href="/wiki/Hydrogen" title="Hydrogen">Hydrogen</a> (<sub>1</sub>H) has three naturally occurring <a href="/wiki/Isotope" title="Isotope">isotopes</a>: <sup>1</sup>H, <sup>2</sup>H, and <sup>3</sup>H. <sup>1</sup>H and <sup>2</sup>H are stable, while <sup>3</sup>H has a <a href="/wiki/Half-life" title="Half-life">half-life</a> of <span class="nowrap"><span data-sort-value="7001123200000000000♠"></span>12.32(2)</span> years.<sup id="cite_ref-NUBASE2020a_3-0" class="reference"><a href="#cite_note-NUBASE2020a-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-NUBASE2020_tropical_year_4-0" class="reference"><a href="#cite_note-NUBASE2020_tropical_year-4"><span class="cite-bracket">[</span>nb 1<span class="cite-bracket">]</span></a></sup> Heavier isotopes also exist; all are synthetic and have a half-life of less than 1 <a href="/wiki/Zeptosecond" class="mw-redirect" title="Zeptosecond">zeptosecond</a> (10<sup>−21</sup> s).<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Korsheninnikov_6-0" class="reference"><a href="#cite_note-Korsheninnikov-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Of these, <sup>5</sup>H is the least stable, while <sup>7</sup>H is the most. </p><p>Hydrogen is the only <a href="/wiki/Chemical_element" title="Chemical element">element</a> whose isotopes have different names that remain in common use today: <sup>2</sup>H is <a href="/wiki/Deuterium" title="Deuterium">deuterium</a><sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> and <sup>3</sup>H is <a href="/wiki/Tritium" title="Tritium">tritium</a>.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> The symbols D and T are sometimes used for deuterium and tritium; IUPAC (<a href="/wiki/International_Union_of_Pure_and_Applied_Chemistry" title="International Union of Pure and Applied Chemistry">International Union of Pure and Applied Chemistry</a>) accepts said symbols, but recommends the standard isotopic symbols <sup>2</sup>H and <sup>3</sup>H, to avoid confusion in alphabetic sorting of <a href="/wiki/Chemical_formula" title="Chemical formula">chemical formulas</a>.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> <sup>1</sup>H, with no <a href="/wiki/Neutron" title="Neutron">neutrons</a>, may be called protium to disambiguate.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> (During the early study of radioactivity, some other heavy radioisotopes were given <a href="/wiki/Chemical_symbol#Symbols_for_named_isotopes" title="Chemical symbol">names</a>, but such names are rarely used today.) </p> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Hydrogen_Deuterium_Tritium_Nuclei_Schmatic-en.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/66/Hydrogen_Deuterium_Tritium_Nuclei_Schmatic-en.svg/400px-Hydrogen_Deuterium_Tritium_Nuclei_Schmatic-en.svg.png" decoding="async" width="400" height="200" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/66/Hydrogen_Deuterium_Tritium_Nuclei_Schmatic-en.svg/600px-Hydrogen_Deuterium_Tritium_Nuclei_Schmatic-en.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/66/Hydrogen_Deuterium_Tritium_Nuclei_Schmatic-en.svg/800px-Hydrogen_Deuterium_Tritium_Nuclei_Schmatic-en.svg.png 2x" data-file-width="1500" data-file-height="750" /></a><figcaption>The three most stable isotopes of hydrogen: protium (<i><a href="/wiki/Mass_number" title="Mass number">A</a></i> = 1), <a href="/wiki/Deuterium" title="Deuterium">deuterium</a> (<i>A</i> = 2), and <a href="/wiki/Tritium" title="Tritium">tritium</a> (<i>A</i> = 3).</figcaption></figure> <div style="clear:both;" class=""></div> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="List_of_isotopes">List of isotopes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Isotopes_of_hydrogen&action=edit&section=1" title="Edit section: List of isotopes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Note: "y" means year, but "ys" means <a href="/wiki/Yoctosecond" class="mw-redirect" title="Yoctosecond">yoctosecond</a> (10<sup>−24</sup> second). </p> <table class="wikitable sortable" style="font-size: 85%; white-space: nowrap"> <tbody><tr style="vertical-align: top"> <th rowspan="2">Nuclide<br /> </th> <th rowspan="2"><a href="/wiki/Atomic_number" title="Atomic number"><i>Z</i></a> </th> <th rowspan="2"><a href="/wiki/Neutron_number" title="Neutron number"><i>N</i></a> </th> <th rowspan="2"><a href="/wiki/Atomic_mass" title="Atomic mass">Isotopic mass</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886047488"><span class="nobold">(<a href="/wiki/Dalton_(unit)" title="Dalton (unit)">Da</a>)</span><sup id="cite_ref-AME2020_II_11-0" class="reference"><a href="#cite_note-AME2020_II-11"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup><br /><sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>n 1<span class="cite-bracket">]</span></a></sup> </th> <th rowspan="2"><a href="/wiki/Half-life" title="Half-life">Half-life</a><sup id="cite_ref-NUBASE2020_13-0" class="reference"><a href="#cite_note-NUBASE2020-13"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup><br /> </th> <th rowspan="2"><a href="/wiki/Decay_mode" class="mw-redirect" title="Decay mode">Decay<br />mode</a><sup id="cite_ref-NUBASE2020_13-1" class="reference"><a href="#cite_note-NUBASE2020-13"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup><br /><sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>n 2<span class="cite-bracket">]</span></a></sup> </th> <th rowspan="2"><a href="/wiki/Decay_product" title="Decay product">Daughter<br />isotope</a><br /><sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>n 3<span class="cite-bracket">]</span></a></sup> </th> <th rowspan="2"><a href="/wiki/Spin_(particle_physics)" class="mw-redirect" title="Spin (particle physics)">Spin</a> and<br /><a href="/wiki/Parity_(physics)#Nuclei" title="Parity (physics)">parity</a><sup id="cite_ref-NUBASE2020_13-2" class="reference"><a href="#cite_note-NUBASE2020-13"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup><br /><sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>n 4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-TNN_17-0" class="reference"><a href="#cite_note-TNN-17"><span class="cite-bracket">[</span>n 5<span class="cite-bracket">]</span></a></sup> </th> <th colspan="2"><a href="/wiki/Natural_abundance" title="Natural abundance">Natural abundance</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886047488"><span class="nobold">(mole fraction)</span> </th> <th rowspan="2">Note </th></tr> <tr> <th>Normal proportion<sup id="cite_ref-NUBASE2020_13-3" class="reference"><a href="#cite_note-NUBASE2020-13"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </th> <th>Range of variation </th></tr> <tr> <td><sup>1</sup>H </td> <td>1 </td> <td>0 </td> <td><span class="nowrap"><span data-sort-value="7000100782503189800♠"></span>1.007<span style="margin-left:.25em;">825</span><span style="margin-left:.25em;">031</span><span style="margin-left:.25em;">898</span>(14)</span> </td> <td colspan="3" align="center"><b>Stable</b><sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>n 6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>n 7<span class="cite-bracket">]</span></a></sup> </td> <td>1/2+ </td> <td colspan="2" style="text-align:center">[<span class="nowrap"><span data-sort-value="6999999720000000000♠"></span>0.999<span style="margin-left:.25em;">72</span></span>, <span class="nowrap"><span data-sort-value="6999999990000000000♠"></span>0.999<span style="margin-left:.25em;">99</span></span>]<sup id="cite_ref-Atomic_Weight_of_Hydrogen_20-0" class="reference"><a href="#cite_note-Atomic_Weight_of_Hydrogen-20"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> </td> <td>Protium </td></tr> <tr> <td><a href="/wiki/Deuterium" title="Deuterium"><sup>2</sup>H</a> (D)<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>n 8<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>n 9<span class="cite-bracket">]</span></a></sup> </td> <td>1 </td> <td>1 </td> <td><span class="nowrap"><span data-sort-value="7000201410177784400♠"></span>2.014<span style="margin-left:.25em;">101</span><span style="margin-left:.25em;">777</span><span style="margin-left:.25em;">844</span>(15)</span> </td> <td colspan="3" align="center"><b>Stable</b> </td> <td>1+ </td> <td colspan="2" style="text-align:center">[<span class="nowrap"><span data-sort-value="6995100000000000000♠"></span>0.000<span style="margin-left:.25em;">01</span></span>, <span class="nowrap"><span data-sort-value="6996279999999999999♠"></span>0.000<span style="margin-left:.25em;">28</span></span>]<sup id="cite_ref-Atomic_Weight_of_Hydrogen_20-1" class="reference"><a href="#cite_note-Atomic_Weight_of_Hydrogen-20"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> </td> <td>Deuterium </td></tr> <tr> <td><a href="/wiki/Tritium" title="Tritium"><sup>3</sup>H</a> (T)<sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">[</span>n 10<span class="cite-bracket">]</span></a></sup> </td> <td>1 </td> <td>2 </td> <td><span class="nowrap"><span data-sort-value="7000301604928132000♠"></span>3.016<span style="margin-left:.25em;">049</span><span style="margin-left:.25em;">281</span><span style="margin-left:.25em;">320</span>(81)</span> </td> <td><span class="nowrap"><span data-sort-value="7008388789632000000♠"></span>12.32(2) y</span> </td> <td><a href="/wiki/Beta_decay" title="Beta decay">β<sup>−</sup></a> </td> <td><b><sup>3</sup>He</b> </td> <td>1/2+ </td> <td>Trace<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">[</span>n 11<span class="cite-bracket">]</span></a></sup> </td> <td> </td> <td>Tritium </td></tr> <tr> <td><sup>4</sup>H </td> <td>1 </td> <td>3 </td> <td><span class="nowrap"><span data-sort-value="7000402643000000000♠"></span>4.026<span style="margin-left:.25em;">43</span>(11)</span> </td> <td><span class="nowrap"><span data-sort-value="6978138999999999999♠"></span>139(10) <a href="/wiki/Yoctosecond" class="mw-redirect" title="Yoctosecond">ys</a></span> </td> <td><a href="/wiki/Neutron_emission" title="Neutron emission">n</a> </td> <td><sup>3</sup>H </td> <td>2− </td> <td> </td> <td> </td></tr> <tr> <td><sup>5</sup>H </td> <td>1 </td> <td>4 </td> <td><span class="nowrap"><span data-sort-value="7000503531000000000♠"></span>5.035<span style="margin-left:.25em;">31</span>(10)</span> </td> <td><span class="nowrap"><span data-sort-value="6977859999999999999♠"></span>86(6) ys</span> </td> <td>2n </td> <td><sup>3</sup>H </td> <td>(1/2+) </td> <td> </td> <td> </td></tr> <tr> <td><sup>6</sup>H </td> <td>1 </td> <td>5 </td> <td><span class="nowrap"><span data-sort-value="7000604496000000000♠"></span>6.044<span style="margin-left:.25em;">96</span>(27)</span> </td> <td><span class="nowrap"><span data-sort-value="6978294000000000000♠"></span>294(67) ys</span> </td> <td> </td> <td> </td> <td>2−# </td> <td> </td> <td> </td></tr> <tr> <td><sup>7</sup>H </td> <td>1 </td> <td>6 </td> <td><span class="nowrap"><span data-sort-value="7000705275000000000♠"></span>7.052<span style="margin-left:.25em;">750</span>(108)</span># </td> <td><span class="nowrap"><span data-sort-value="6978652000000000000♠"></span>652(558) ys</span> </td> <td> </td> <td> </td> <td>1/2+# </td> <td> </td> <td> </td></tr> <tr> <th colspan="20" style="text-align:right; line-height:85%;"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r886047488"><span class="nobold"><i>This table header & footer:</i> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist"><ul><li class="nv-view"><a href="/wiki/Template:Isotopes_table" title="Template:Isotopes table"><span title="View this template">view</span></a></li></ul></div></span> </th></tr></tbody></table> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text">( ) –  Uncertainty (1<i>σ</i>) is given in concise form in parentheses after the corresponding last digits.</span> </li> <li id="cite_note-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-14">^</a></b></span> <span class="reference-text"> Modes of decay: <table style="margin-left:1.5em;"> <tbody><tr style="line-height: 1.1em; vertical-align: top"> <td>n:</td> <td><a href="/wiki/Neutron_emission" title="Neutron emission">Neutron emission</a> </td></tr></tbody></table></span> </li> <li id="cite_note-15"><span class="mw-cite-backlink"><b><a href="#cite_ref-15">^</a></b></span> <span class="reference-text"><b>Bold symbol</b> as daughter –  Daughter product is stable.</span> </li> <li id="cite_note-16"><span class="mw-cite-backlink"><b><a href="#cite_ref-16">^</a></b></span> <span class="reference-text">( ) spin value –  Indicates spin with weak assignment arguments.</span> </li> <li id="cite_note-TNN-17"><span class="mw-cite-backlink"><b><a href="#cite_ref-TNN_17-0">^</a></b></span> <span class="reference-text"># –  Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).</span> </li> <li id="cite_note-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-18">^</a></b></span> <span class="reference-text">Unless <a href="/wiki/Proton_decay" title="Proton decay">proton decay</a> occurs.</span> </li> <li id="cite_note-19"><span class="mw-cite-backlink"><b><a href="#cite_ref-19">^</a></b></span> <span class="reference-text">This and <b><sup>3</sup>He</b> are the only stable nuclides with more protons than neutrons.</span> </li> <li id="cite_note-21"><span class="mw-cite-backlink"><b><a href="#cite_ref-21">^</a></b></span> <span class="reference-text">Produced in <a href="/wiki/Big_Bang_nucleosynthesis" title="Big Bang nucleosynthesis">Big Bang nucleosynthesis</a> (BBN).</span> </li> <li id="cite_note-22"><span class="mw-cite-backlink"><b><a href="#cite_ref-22">^</a></b></span> <span class="reference-text">One of the few stable <a href="/wiki/Even_and_odd_atomic_nuclei#Odd_proton,_odd_neutron" title="Even and odd atomic nuclei">odd-odd nuclei</a></span> </li> <li id="cite_note-24"><span class="mw-cite-backlink"><b><a href="#cite_ref-24">^</a></b></span> <span class="reference-text">Produced in BBN, but not primordial, as all of it has decayed to <b><sup>3</sup>He</b>.<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup></span> </li> <li id="cite_note-25"><span class="mw-cite-backlink"><b><a href="#cite_ref-25">^</a></b></span> <span class="reference-text">Tritium occurs naturally as a <a href="/wiki/Cosmogenic_nuclide" title="Cosmogenic nuclide">cosmogenic nuclide</a>.</span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Hydrogen-1_(protium)"><span id="Hydrogen-1_.28protium.29"></span>Hydrogen-1 (protium)<span class="anchor" id="Hydrogen-1_(Protium)"></span><span class="anchor" id="Hydrogen-1"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Isotopes_of_hydrogen&action=edit&section=2" title="Edit section: Hydrogen-1 (protium)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:H-1_atom.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/ad/H-1_atom.png/210px-H-1_atom.png" decoding="async" width="210" height="204" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/ad/H-1_atom.png/315px-H-1_atom.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/ad/H-1_atom.png/420px-H-1_atom.png 2x" data-file-width="736" data-file-height="716" /></a><figcaption><sup>1</sup>H consists of 1 proton and 1 electron: the only stable nuclide with no neutrons (see <a href="/wiki/Diproton" class="mw-redirect" title="Diproton">diproton</a> for a discussion of why no others exist)</figcaption></figure><style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">"Protium" redirects here. For other uses, see <a href="/wiki/Protium_(disambiguation)" class="mw-disambig" title="Protium (disambiguation)">Protium (disambiguation)</a>.</div> <p><b><sup>1</sup>H</b> (atomic mass <span class="nowrap"><span data-sort-value="7000100782503189800♠"></span>1.007<span style="margin-left:.25em;">825</span><span style="margin-left:.25em;">031</span><span style="margin-left:.25em;">898</span>(14) <a href="/wiki/Dalton_(unit)" title="Dalton (unit)">Da</a></span>) is the most common hydrogen isotope, with an abundance of >99.98%. Its <a href="/wiki/Atomic_nucleus" title="Atomic nucleus">nucleus</a> consists of only a single <a href="/wiki/Proton" title="Proton">proton</a>, so it has the formal name <b>protium</b>. </p><p>The proton has never been observed to decay, so <sup>1</sup>H is considered a stable isotope. Some <a href="/wiki/Grand_Unified_Theories" class="mw-redirect" title="Grand Unified Theories">Grand Unified Theories</a> proposed in the 1970s predict that <a href="/wiki/Proton_decay" title="Proton decay">proton decay</a> can occur with a half-life between <span class="nowrap"><span data-sort-value="7028100000000000000♠"></span>10<sup>28</sup></span> and <span class="nowrap"><span data-sort-value="7036100000000000000♠"></span>10<sup>36</sup></span> years.<sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> If so, then <sup>1</sup>H (and all nuclei now believed to be stable) are only <a href="/wiki/Observationally_stable" class="mw-redirect" title="Observationally stable">observationally stable</a>. As of 2018, experiments have shown that the mean lifetime of the proton is ><span class="nowrap"><span data-sort-value="7029360000000000000♠"></span>3.6<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>29</sup></span> years.<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Hydrogen-2_(deuterium)"><span id="Hydrogen-2_.28deuterium.29"></span>Hydrogen-2 (deuterium)<span class="anchor" id="Hydrogen-2"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Isotopes_of_hydrogen&action=edit&section=3" title="Edit section: Hydrogen-2 (deuterium)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Deuterium" title="Deuterium">Deuterium</a></div> <figure class="mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:H-2_atom.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/23/H-2_atom.png/210px-H-2_atom.png" decoding="async" width="210" height="219" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/23/H-2_atom.png/315px-H-2_atom.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/23/H-2_atom.png/420px-H-2_atom.png 2x" data-file-width="660" data-file-height="688" /></a><figcaption>Deuterium consists of 1 proton, 1 neutron, and 1 electron.</figcaption></figure> <p><i>Deuterium</i>, <b><sup>2</sup>H</b> (atomic mass <span class="nowrap"><span data-sort-value="7000201410177784400♠"></span>2.014<span style="margin-left:.25em;">101</span><span style="margin-left:.25em;">777</span><span style="margin-left:.25em;">844</span>(15) <a href="/wiki/Dalton_(unit)" title="Dalton (unit)">Da</a></span>), the other stable hydrogen isotope, has one proton and one neutron in its nucleus, called a deuteron. <sup>2</sup>H comprises 26–184 ppm (by population, not mass) of hydrogen on Earth; the lower number tends to be found in hydrogen gas and the higher enrichment (150 ppm) is typical of <a href="/wiki/Seawater" title="Seawater">seawater</a>. Deuterium on Earth has been enriched with respect to its initial concentration in the <a href="/wiki/Big_Bang" title="Big Bang">Big Bang</a> and <a href="/wiki/Outer_solar_system" class="mw-redirect" title="Outer solar system">outer solar system</a> (≈27 ppm, by atom fraction) and older parts of the <a href="/wiki/Milky_Way" title="Milky Way">Milky Way</a> (≈23 ppm). Presumably the differential concentration of deuterium in the inner solar system is due to the lower volatility of <a href="/wiki/Deuterium_gas" class="mw-redirect" title="Deuterium gas">deuterium gas</a> and compounds, enriching deuterium fractions in <a href="/wiki/Comet" title="Comet">comets</a> and planets exposed to significant heat from the <a href="/wiki/Sun" title="Sun">Sun</a> over billions of years of <a href="/wiki/Solar_system_evolution" class="mw-redirect" title="Solar system evolution">solar system evolution</a>. </p><p>Deuterium is not radioactive, and is not a significant toxicity hazard. Water enriched in <sup>2</sup>H is called <a href="/wiki/Heavy_water" title="Heavy water">heavy water</a>. Deuterium and its compounds are used as a non-radioactive label in chemical experiments and in solvents for <sup>1</sup>H-<a href="/wiki/Nuclear_magnetic_resonance_spectroscopy" title="Nuclear magnetic resonance spectroscopy">nuclear magnetic resonance spectroscopy</a>. Heavy water is used as a <a href="/wiki/Neutron_moderator" title="Neutron moderator">neutron moderator</a> and coolant for nuclear reactors. Deuterium is also a potential fuel for commercial <a href="/wiki/Nuclear_fusion" title="Nuclear fusion">nuclear fusion</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Hydrogen-3_(tritium)"><span id="Hydrogen-3_.28tritium.29"></span>Hydrogen-3 (tritium)<span class="anchor" id="Hydrogen-3"></span></h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Isotopes_of_hydrogen&action=edit&section=4" title="Edit section: Hydrogen-3 (tritium)"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Tritium" title="Tritium">Tritium</a></div> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:H-3_atom.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4f/H-3_atom.png/210px-H-3_atom.png" decoding="async" width="210" height="221" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4f/H-3_atom.png/315px-H-3_atom.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4f/H-3_atom.png/420px-H-3_atom.png 2x" data-file-width="668" data-file-height="704" /></a><figcaption>Tritium consists of 1 proton, 2 neutrons, and 1 electron.</figcaption></figure> <p><i>Tritium</i>, <b><sup>3</sup>H</b> (atomic mass <span class="nowrap"><span data-sort-value="7000301604928132000♠"></span>3.016<span style="margin-left:.25em;">049</span><span style="margin-left:.25em;">281</span><span style="margin-left:.25em;">320</span>(81) <a href="/wiki/Dalton_(unit)" title="Dalton (unit)">Da</a></span>), contains one proton and two neutrons in its nucleus (triton). It is <a href="/wiki/Radioactive" class="mw-redirect" title="Radioactive">radioactive</a>, <a href="/wiki/Beta_decay" title="Beta decay">β<sup>−</sup> decaying</a> into <a href="/wiki/Helium-3" title="Helium-3">helium-3</a> with <a href="/wiki/Half-life" title="Half-life">half-life</a> <span class="nowrap"><span data-sort-value="7008388789632000000♠"></span>12.32(2) years</span>.<sup id="cite_ref-NUBASE2020_tropical_year_4-1" class="reference"><a href="#cite_note-NUBASE2020_tropical_year-4"><span class="cite-bracket">[</span>nb 1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-NUBASE2020a_3-1" class="reference"><a href="#cite_note-NUBASE2020a-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Traces of <sup>3</sup>H occur naturally due to cosmic rays interacting with atmospheric gases. <sup>3</sup>H has also been released in <a href="/wiki/Nuclear_tests" class="mw-redirect" title="Nuclear tests">nuclear tests</a>. It is used in <a href="/wiki/Fusion_bombs" class="mw-redirect" title="Fusion bombs">fusion bombs</a>, as a tracer in <a href="/wiki/Isotope_geochemistry" title="Isotope geochemistry">isotope geochemistry</a>, and in <a href="/wiki/Tritium_radioluminescence" title="Tritium radioluminescence">self-powered lighting</a> devices. </p><p>The most common way to produce <sup>3</sup>H is to bombard a natural <a href="/wiki/Isotope_of_lithium" class="mw-redirect" title="Isotope of lithium">isotope of lithium</a>, <sup>6</sup>Li, with neutrons in a <a href="/wiki/Nuclear_reactor" title="Nuclear reactor">nuclear reactor</a>. </p><p>Tritium can be used in chemical and biological labeling experiments as a <a href="/wiki/Radioactive_tracer" title="Radioactive tracer">radioactive tracer</a>.<sup id="cite_ref-BNT_28-0" class="reference"><a href="#cite_note-BNT-28"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-green20_29-0" class="reference"><a href="#cite_note-green20-29"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Deuterium%E2%80%93tritium_fusion" title="Deuterium–tritium fusion">Deuterium–tritium fusion</a> uses <sup>2</sup>H and <sup>3</sup>H as its main reactants, giving energy through the loss of mass when the two nuclei collide and fuse at high temperatures. </p> <div class="mw-heading mw-heading2"><h2 id="Hydrogen-4">Hydrogen-4</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Isotopes_of_hydrogen&action=edit&section=5" title="Edit section: Hydrogen-4"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><b><sup>4</sup>H</b> (<a href="/wiki/Atomic_mass" title="Atomic mass">atomic mass</a> <span class="nowrap"><span data-sort-value="7000402643000000000♠"></span>4.026<span style="margin-left:.25em;">43</span>(11)</span>), with one proton and three neutrons, is a highly <a href="/wiki/Radionuclide" title="Radionuclide">unstable</a> isotope. It has been synthesized in the laboratory by bombarding tritium with fast-moving deuterons;<sup id="cite_ref-Ter-Akopian_30-0" class="reference"><a href="#cite_note-Ter-Akopian-30"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> the triton captured a neutron from the deuteron. The presence of <sup>4</sup>H was deduced by detecting the emitted protons. It decays by <a href="/wiki/Neutron_emission" title="Neutron emission">neutron emission</a> into <sup>3</sup>H with a <a href="/wiki/Half-life" title="Half-life">half-life</a> of <span class="nowrap"><span data-sort-value="6978138999999999999♠"></span>139(10) <a href="/wiki/Yoctosecond" class="mw-redirect" title="Yoctosecond">ys</a></span> (or <span class="nowrap"><span data-sort-value="6978139000000000000♠"></span>1.39(10)<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>−22</sup> s</span>). </p><p>In the 1955 satirical novel <i><a href="/wiki/The_Mouse_That_Roared" title="The Mouse That Roared">The Mouse That Roared</a></i>, the name <b>quadium</b> was given to the <sup>4</sup>H that powered the <i>Q-bomb</i> that the Duchy of <a href="/wiki/Grand_Fenwick" title="Grand Fenwick">Grand Fenwick</a> captured from the United States. </p> <div class="mw-heading mw-heading2"><h2 id="Hydrogen-5">Hydrogen-5</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Isotopes_of_hydrogen&action=edit&section=6" title="Edit section: Hydrogen-5"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><b><sup>5</sup>H</b> (<a href="/wiki/Atomic_mass" title="Atomic mass">atomic mass</a> <span class="nowrap"><span data-sort-value="7000503531000000000♠"></span>5.035<span style="margin-left:.25em;">31</span>(10)</span>), with one proton and four neutrons, is highly unstable. It has been synthesized in the lab by bombarding tritium with fast-moving tritons;<sup id="cite_ref-Ter-Akopian_30-1" class="reference"><a href="#cite_note-Ter-Akopian-30"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> one triton captures two neutrons from the other, becoming a nucleus with one proton and four neutrons. The remaining proton may be detected, and the existence of <sup>5</sup>H deduced. It decays by double <a href="/wiki/Neutron_emission" title="Neutron emission">neutron emission</a> into <sup>3</sup>H and has a <a href="/wiki/Half-life" title="Half-life">half-life</a> of <span class="nowrap"><span data-sort-value="6977859999999999999♠"></span>86(6) <a href="/wiki/Yoctosecond" class="mw-redirect" title="Yoctosecond">ys</a></span> (<span class="nowrap"><span data-sort-value="6977859999999999999♠"></span>8.6(6)<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>−23</sup> s</span>) – the shortest half-life of any known nuclide.<sup id="cite_ref-NUBASE2020a_3-2" class="reference"><a href="#cite_note-NUBASE2020a-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Hydrogen-6">Hydrogen-6</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Isotopes_of_hydrogen&action=edit&section=7" title="Edit section: Hydrogen-6"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><b><sup>6</sup>H</b> (<a href="/wiki/Atomic_mass" title="Atomic mass">atomic mass</a> <span class="nowrap"><span data-sort-value="7000604496000000000♠"></span>6.044<span style="margin-left:.25em;">96</span>(27)</span>) has one <a href="/wiki/Proton" title="Proton">proton</a> and five <a href="/wiki/Neutron" title="Neutron">neutrons</a>. It has a <a href="/wiki/Half-life" title="Half-life">half-life</a> of <span class="nowrap"><span data-sort-value="6978294000000000000♠"></span>294(67) <a href="/wiki/Yoctosecond" class="mw-redirect" title="Yoctosecond">ys</a></span> (<span class="nowrap"><span data-sort-value="6978294000000000000♠"></span>2.94(67)<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>−22</sup> s</span>). </p> <div class="mw-heading mw-heading2"><h2 id="Hydrogen-7">Hydrogen-7</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Isotopes_of_hydrogen&action=edit&section=8" title="Edit section: Hydrogen-7"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><b><sup>7</sup>H</b> (<a href="/wiki/Atomic_mass" title="Atomic mass">atomic mass</a> <span class="nowrap"><span data-sort-value="7000705275000000000♠"></span>7.052<span style="margin-left:.25em;">75</span>(108)</span>) has one <a href="/wiki/Proton" title="Proton">proton</a> and six <a href="/wiki/Neutron" title="Neutron">neutrons</a>. It was first synthesized in 2003 by a group of Russian, Japanese and French scientists at <a href="/wiki/Riken" title="Riken">Riken</a>'s <a href="/wiki/Radioactive_Isotope_Beam_Factory" title="Radioactive Isotope Beam Factory">Radioactive Isotope Beam Factory</a> by bombarding <a href="/wiki/Hydrogen" title="Hydrogen">hydrogen</a> with <a href="/wiki/Helium-8" class="mw-redirect" title="Helium-8">helium-8</a> atoms; all six of the helium-8's neutrons were donated to the hydrogen nucleus. The two remaining protons were detected by the "RIKEN telescope", a device made of several layers of sensors, positioned behind the target of the RI Beam cyclotron.<sup id="cite_ref-Korsheninnikov_6-1" class="reference"><a href="#cite_note-Korsheninnikov-6"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> <sup>7</sup>H has a half-life of <span class="nowrap"><span data-sort-value="6978652000000000000♠"></span>652(558) <a href="/wiki/Yoctosecond" class="mw-redirect" title="Yoctosecond">ys</a></span> (<span class="nowrap"><span data-sort-value="6978652000000000000♠"></span>6.52(558)<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>−22</sup> s</span>).<sup id="cite_ref-NUBASE2020a_3-3" class="reference"><a href="#cite_note-NUBASE2020a-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Decay_chains">Decay chains</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Isotopes_of_hydrogen&action=edit&section=9" title="Edit section: Decay chains"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><sup>4</sup>H and <sup>5</sup>H decay directly to <sup>3</sup>H, which then decays to stable <a href="/wiki/Helium-3" title="Helium-3"><sup>3</sup>He</a>. Decay of the heaviest isotopes, <sup>6</sup>H and <sup>7</sup>H, has not been experimentally observed.<sup id="cite_ref-NUBASE2020_13-4" class="reference"><a href="#cite_note-NUBASE2020-13"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </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 {\begin{array}{rcl}\\{\ce {^{3}_{1}H}}&{\ce {->[12.32\ {\ce {y}}]}}&{\ce {{^{3}_{2}He}+e^{-}}}\\{\ce {^{4}_{1}H}}&{\ce {->[139\ {\ce {ys}}]}}&{\ce {{^{3}_{1}H}+{^{1}_{0}n}}}\\{\ce {^{5}_{1}H}}&{\ce {->[86\ {\ce {ys}}]}}&{\ce {{^{3}_{1}H}+{2_{0}^{1}n}}}\\{}\end{array}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mtable columnalign="right center left" rowspacing="4pt" columnspacing="1em"> <mtr> <mtd /> </mtr> <mtr> <mtd> <mrow class="MJX-TeXAtom-ORD"> <mmultiscripts> <mtext>H</mtext> <none /> <none /> <mprescripts /> <mn>1</mn> <mn>3</mn> </mmultiscripts> </mrow> </mtd> <mtd> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-REL"> <mover> <mo>→</mo> <mpadded width="+0.611em" lspace="0.278em" voffset=".15em"> <mn>12.32</mn> <mtext> </mtext> <mrow class="MJX-TeXAtom-ORD"> <mtext>y</mtext> </mrow> </mpadded> </mover> </mrow> </mrow> </mtd> <mtd> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mmultiscripts> <mtext>He</mtext> <none /> <none /> <mprescripts /> <mn>2</mn> <mn>3</mn> </mmultiscripts> </mrow> <mo>+</mo> <msup> <mtext>e</mtext> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> </mrow> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow class="MJX-TeXAtom-ORD"> <mmultiscripts> <mtext>H</mtext> <none /> <none /> <mprescripts /> <mn>1</mn> <mn>4</mn> </mmultiscripts> </mrow> </mtd> <mtd> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-REL"> <mover> <mo>→</mo> <mpadded width="+0.611em" lspace="0.278em" voffset=".15em"> <mn>139</mn> <mtext> </mtext> <mrow class="MJX-TeXAtom-ORD"> <mtext>ys</mtext> </mrow> </mpadded> </mover> </mrow> </mrow> </mtd> <mtd> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mmultiscripts> <mtext>H</mtext> <none /> <none /> <mprescripts /> <mn>1</mn> <mn>3</mn> </mmultiscripts> </mrow> <mo>+</mo> <mrow class="MJX-TeXAtom-ORD"> <mmultiscripts> <mtext>n</mtext> <none /> <none /> <mprescripts /> <mn>0</mn> <mn>1</mn> </mmultiscripts> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow class="MJX-TeXAtom-ORD"> <mmultiscripts> <mtext>H</mtext> <none /> <none /> <mprescripts /> <mn>1</mn> <mn>5</mn> </mmultiscripts> </mrow> </mtd> <mtd> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-REL"> <mover> <mo>→</mo> <mpadded width="+0.611em" lspace="0.278em" voffset=".15em"> <mn>86</mn> <mtext> </mtext> <mrow class="MJX-TeXAtom-ORD"> <mtext>ys</mtext> </mrow> </mpadded> </mover> </mrow> </mrow> </mtd> <mtd> <mrow class="MJX-TeXAtom-ORD"> <mrow class="MJX-TeXAtom-ORD"> <mmultiscripts> <mtext>H</mtext> <none /> <none /> <mprescripts /> <mn>1</mn> <mn>3</mn> </mmultiscripts> </mrow> <mo>+</mo> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> <msubsup> <mspace width="thinmathspace" /> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>1</mn> </mrow> </msubsup> <mtext>n</mtext> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow class="MJX-TeXAtom-ORD"> </mrow> </mtd> </mtr> </mtable> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\begin{array}{rcl}\\{\ce {^{3}_{1}H}}&{\ce {->[12.32\ {\ce {y}}]}}&{\ce {{^{3}_{2}He}+e^{-}}}\\{\ce {^{4}_{1}H}}&{\ce {->[139\ {\ce {ys}}]}}&{\ce {{^{3}_{1}H}+{^{1}_{0}n}}}\\{\ce {^{5}_{1}H}}&{\ce {->[86\ {\ce {ys}}]}}&{\ce {{^{3}_{1}H}+{2_{0}^{1}n}}}\\{}\end{array}}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/4c2d846790e9ab8179e9026a3106c4410c5d8e2b" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -9.505ex; width:24.129ex; height:20.176ex;" alt="{\displaystyle {\begin{array}{rcl}\\{\ce {^{3}_{1}H}}&{\ce {->[12.32\ {\ce {y}}]}}&{\ce {{^{3}_{2}He}+e^{-}}}\\{\ce {^{4}_{1}H}}&{\ce {->[139\ {\ce {ys}}]}}&{\ce {{^{3}_{1}H}+{^{1}_{0}n}}}\\{\ce {^{5}_{1}H}}&{\ce {->[86\ {\ce {ys}}]}}&{\ce {{^{3}_{1}H}+{2_{0}^{1}n}}}\\{}\end{array}}}"></span></dd></dl> <p>Decay times are in <a href="/wiki/Yoctosecond" class="mw-redirect" title="Yoctosecond">yoctoseconds</a> (<span class="nowrap"><span data-sort-value="6976099999999999999♠"></span>10<sup>−24</sup> s</span>) for all these isotopes except <sup>3</sup>H, which is in years. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Isotopes_of_hydrogen&action=edit&section=10" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Hydrogen_atom" title="Hydrogen atom">Hydrogen atom</a></li> <li><a href="/wiki/Hydrogen_isotope_biogeochemistry" title="Hydrogen isotope biogeochemistry">Hydrogen isotope biogeochemistry</a></li> <li><a href="/wiki/Exotic_atom#Muonic_helium_(Hydrogen-4.1)" title="Exotic atom">Hydrogen-4.1 (Muonic helium)</a></li> <li><a href="/wiki/Muonium" title="Muonium">Muonium</a> – acts like an exotic light isotope of hydrogen</li> <li><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Commons-logo.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/24px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> Media related to <a href="https://commons.wikimedia.org/wiki/Isotopes_of_hydrogen" class="extiw" title="commons:Isotopes of hydrogen">Isotopes of hydrogen</a> at Wikimedia Commons</li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Isotopes_of_hydrogen&action=edit&section=11" title="Edit section: Notes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-NUBASE2020_tropical_year-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-NUBASE2020_tropical_year_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-NUBASE2020_tropical_year_4-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text">Note that NUBASE2020 uses the <a href="/wiki/Tropical_year" title="Tropical year">tropical year</a> to convert between years and other units of time, not the <a href="/wiki/Gregorian_year" class="mw-redirect" title="Gregorian year">Gregorian year</a>. The relationship between years and other time units in NUBASE2020 is as follows: <span class="nowrap">1 y = 365.2422 d = 31 556 926 s</span> </span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Isotopes_of_hydrogen&action=edit&section=12" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.ciaaw.org/hydrogen.htm">"Standard Atomic Weights: Hydrogen"</a>. <a href="/wiki/Commission_on_Isotopic_Abundances_and_Atomic_Weights" title="Commission on Isotopic Abundances and Atomic Weights">CIAAW</a>. 2009.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Standard+Atomic+Weights%3A+Hydrogen&rft.pub=CIAAW&rft.date=2009&rft_id=https%3A%2F%2Fwww.ciaaw.org%2Fhydrogen.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> <li id="cite_note-CIAAW2021-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-CIAAW2021_2-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFProhaskaIrrgeherBenefieldBöhlke2022" class="citation journal cs1">Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). <a rel="nofollow" class="external text" href="https://www.degruyter.com/document/doi/10.1515/pac-2019-0603/html">"Standard atomic weights of the elements 2021 (IUPAC Technical Report)"</a>. <i>Pure and Applied Chemistry</i>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1515%2Fpac-2019-0603">10.1515/pac-2019-0603</a>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/1365-3075">1365-3075</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Pure+and+Applied+Chemistry&rft.atitle=Standard+atomic+weights+of+the+elements+2021+%28IUPAC+Technical+Report%29&rft.date=2022-05-04&rft_id=info%3Adoi%2F10.1515%2Fpac-2019-0603&rft.issn=1365-3075&rft.aulast=Prohaska&rft.aufirst=Thomas&rft.au=Irrgeher%2C+Johanna&rft.au=Benefield%2C+Jacqueline&rft.au=B%C3%B6hlke%2C+John+K.&rft.au=Chesson%2C+Lesley+A.&rft.au=Coplen%2C+Tyler+B.&rft.au=Ding%2C+Tiping&rft.au=Dunn%2C+Philip+J.+H.&rft.au=Gr%C3%B6ning%2C+Manfred&rft.au=Holden%2C+Norman+E.&rft.au=Meijer%2C+Harro+A.+J.&rft_id=https%3A%2F%2Fwww.degruyter.com%2Fdocument%2Fdoi%2F10.1515%2Fpac-2019-0603%2Fhtml&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> <li id="cite_note-NUBASE2020a-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-NUBASE2020a_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-NUBASE2020a_3-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-NUBASE2020a_3-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-NUBASE2020a_3-3"><sup><i><b>d</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKondevWangHuangNaimi2021" class="citation journal cs1">Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (March 2021). <a rel="nofollow" class="external text" href="https://doi.org/10.1088%2F1674-1137%2Fabddae">"The NUBASE2020 evaluation of nuclear physics properties \ast"</a>. <i>Chinese Physics C</i>. <b>45</b> (3): 030001. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2021ChPhC..45c0001K">2021ChPhC..45c0001K</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1088%2F1674-1137%2Fabddae">10.1088/1674-1137/abddae</a></span>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/1674-1137">1674-1137</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:233794940">233794940</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Chinese+Physics+C&rft.atitle=The+NUBASE2020+evaluation+of+nuclear+physics+properties+%5Cast&rft.volume=45&rft.issue=3&rft.pages=030001&rft.date=2021-03&rft_id=info%3Adoi%2F10.1088%2F1674-1137%2Fabddae&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A233794940%23id-name%3DS2CID&rft.issn=1674-1137&rft_id=info%3Abibcode%2F2021ChPhC..45c0001K&rft.aulast=Kondev&rft.aufirst=F.+G.&rft.au=Wang%2C+M.&rft.au=Huang%2C+W.+J.&rft.au=Naimi%2C+S.&rft.au=Audi%2C+G.&rft_id=https%3A%2F%2Fdoi.org%2F10.1088%252F1674-1137%252Fabddae&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFY._B._Gurov2004" class="citation journal cs1">Y. B. Gurov; et al. (2004). "Spectroscopy of superheavy hydrogen isotopes in stopped-pion absorption by nuclei". <i><a href="/w/index.php?title=Physics_of_Atomic_Nuclei&action=edit&redlink=1" class="new" title="Physics of Atomic Nuclei (page does not exist)">Physics of Atomic Nuclei</a></i>. <b>68</b> (3): 491–497. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2005PAN....68..491G">2005PAN....68..491G</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1134%2F1.1891200">10.1134/1.1891200</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:122902571">122902571</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Physics+of+Atomic+Nuclei&rft.atitle=Spectroscopy+of+superheavy+hydrogen+isotopes+in+stopped-pion+absorption+by+nuclei&rft.volume=68&rft.issue=3&rft.pages=491-497&rft.date=2004&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A122902571%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1134%2F1.1891200&rft_id=info%3Abibcode%2F2005PAN....68..491G&rft.au=Y.+B.+Gurov&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> <li id="cite_note-Korsheninnikov-6"><span class="mw-cite-backlink">^ <a href="#cite_ref-Korsheninnikov_6-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Korsheninnikov_6-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFA._A._Korsheninnikov2003" class="citation journal cs1">A. A. Korsheninnikov; et al. (2003). "Experimental Evidence for the Existence of <sup>7</sup>H and for a Specific Structure of <sup>8</sup>He". <i><a href="/wiki/Physical_Review_Letters" title="Physical Review Letters">Physical Review Letters</a></i>. <b>90</b> (8): 082501. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2003PhRvL..90h2501K">2003PhRvL..90h2501K</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1103%2FPhysRevLett.90.082501">10.1103/PhysRevLett.90.082501</a>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/12633420">12633420</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Physical+Review+Letters&rft.atitle=Experimental+Evidence+for+the+Existence+of+%3Csup%3E7%3C%2Fsup%3EH+and+for+a+Specific+Structure+of+%3Csup%3E8%3C%2Fsup%3EHe&rft.volume=90&rft.issue=8&rft.pages=082501&rft.date=2003&rft_id=info%3Apmid%2F12633420&rft_id=info%3Adoi%2F10.1103%2FPhysRevLett.90.082501&rft_id=info%3Abibcode%2F2003PhRvL..90h2501K&rft.au=A.+A.+Korsheninnikov&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><a href="/wiki/International_Union_of_Pure_and_Applied_Chemistry" title="International Union of Pure and Applied Chemistry">IUPAC</a>, <i><a href="/wiki/IUPAC_books#Gold_Book" class="mw-redirect" title="IUPAC books">Compendium of Chemical Terminology</a></i>, 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006–) "<a rel="nofollow" class="external text" href="https://goldbook.iupac.org/terms/view/D01648.html">deuterium</a>". <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1351%2Fgoldbook.D01648">10.1351/goldbook.D01648</a></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><a href="/wiki/International_Union_of_Pure_and_Applied_Chemistry" title="International Union of Pure and Applied Chemistry">IUPAC</a>, <i><a href="/wiki/IUPAC_books#Gold_Book" class="mw-redirect" title="IUPAC books">Compendium of Chemical Terminology</a></i>, 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006–) "<a rel="nofollow" class="external text" href="https://goldbook.iupac.org/terms/view/T06513.html">tritium</a>". <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1351%2Fgoldbook.T06513">10.1351/goldbook.T06513</a></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><a href="/wiki/International_Union_of_Pure_and_Applied_Chemistry" title="International Union of Pure and Applied Chemistry">International Union of Pure and Applied Chemistry</a> (2005). <i><a href="/wiki/Nomenclature_of_Inorganic_Chemistry" class="mw-redirect" title="Nomenclature of Inorganic Chemistry">Nomenclature of Inorganic Chemistry</a></i> (IUPAC Recommendations 2005). Cambridge (UK): <a href="/wiki/Royal_Society_of_Chemistry" title="Royal Society of Chemistry">RSC</a>–<a href="/wiki/International_Union_of_Pure_and_Applied_Chemistry" title="International Union of Pure and Applied Chemistry">IUPAC</a>. <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-85404-438-8" title="Special:BookSources/0-85404-438-8">0-85404-438-8</a>. p. 48. <a rel="nofollow" class="external text" href="https://old.iupac.org/publications/books/rbook/Red_Book_2005.pdf">Electronic version.</a></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><a href="/wiki/International_Union_of_Pure_and_Applied_Chemistry" title="International Union of Pure and Applied Chemistry">IUPAC</a>, <i><a href="/wiki/IUPAC_books#Gold_Book" class="mw-redirect" title="IUPAC books">Compendium of Chemical Terminology</a></i>, 2nd ed. (the "Gold Book") (1997). Online corrected version: (2006–) "<a rel="nofollow" class="external text" href="https://goldbook.iupac.org/terms/view/P04903.html">protium</a>". <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1351%2Fgoldbook.P04903">10.1351/goldbook.P04903</a></span> </li> <li id="cite_note-AME2020_II-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-AME2020_II_11-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWangHuangKondevAudi2021" class="citation journal cs1">Wang, Meng; Huang, W.J.; Kondev, F.G.; Audi, G.; Naimi, S. (2021). "The AME 2020 atomic mass evaluation (II). Tables, graphs and references*". <i>Chinese Physics C</i>. <b>45</b> (3): 030003. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1088%2F1674-1137%2Fabddaf">10.1088/1674-1137/abddaf</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Chinese+Physics+C&rft.atitle=The+AME+2020+atomic+mass+evaluation+%28II%29.+Tables%2C+graphs+and+references%2A&rft.volume=45&rft.issue=3&rft.pages=030003&rft.date=2021&rft_id=info%3Adoi%2F10.1088%2F1674-1137%2Fabddaf&rft.aulast=Wang&rft.aufirst=Meng&rft.au=Huang%2C+W.J.&rft.au=Kondev%2C+F.G.&rft.au=Audi%2C+G.&rft.au=Naimi%2C+S.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> <li id="cite_note-NUBASE2020-13"><span class="mw-cite-backlink">^ <a href="#cite_ref-NUBASE2020_13-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-NUBASE2020_13-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-NUBASE2020_13-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-NUBASE2020_13-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-NUBASE2020_13-4"><sup><i><b>e</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKondevWangHuangNaimi2021" class="citation journal cs1">Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). <a rel="nofollow" class="external text" href="https://www-nds.iaea.org/amdc/ame2020/NUBASE2020.pdf">"The NUBASE2020 evaluation of nuclear properties"</a> <span class="cs1-format">(PDF)</span>. <i>Chinese Physics C</i>. <b>45</b> (3): 030001. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1088%2F1674-1137%2Fabddae">10.1088/1674-1137/abddae</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Chinese+Physics+C&rft.atitle=The+NUBASE2020+evaluation+of+nuclear+properties&rft.volume=45&rft.issue=3&rft.pages=030001&rft.date=2021&rft_id=info%3Adoi%2F10.1088%2F1674-1137%2Fabddae&rft.aulast=Kondev&rft.aufirst=F.+G.&rft.au=Wang%2C+M.&rft.au=Huang%2C+W.+J.&rft.au=Naimi%2C+S.&rft.au=Audi%2C+G.&rft_id=https%3A%2F%2Fwww-nds.iaea.org%2Famdc%2Fame2020%2FNUBASE2020.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span> </span> </li> <li id="cite_note-Atomic_Weight_of_Hydrogen-20"><span class="mw-cite-backlink">^ <a href="#cite_ref-Atomic_Weight_of_Hydrogen_20-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Atomic_Weight_of_Hydrogen_20-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://ciaaw.org/hydrogen.htm">"Atomic Weight of Hydrogen"</a>. <i>CIAAW</i><span class="reference-accessdate">. Retrieved <span class="nowrap">24 June</span> 2021</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=CIAAW&rft.atitle=Atomic+Weight+of+Hydrogen&rft_id=http%3A%2F%2Fciaaw.org%2Fhydrogen.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> <li id="cite_note-23"><span class="mw-cite-backlink"><b><a href="#cite_ref-23">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFCoc2009" class="citation journal cs1">Coc, Alain (2009). "Big-bang nucleosynthesis: A probe of the early Universe". <i>Nuclear Instruments and Methods in Physics Research Section A</i>. <b>611</b> (2–3): 224–230. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2009NIMPA.611..224C">2009NIMPA.611..224C</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1016%2Fj.nima.2009.07.052">10.1016/j.nima.2009.07.052</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Nuclear+Instruments+and+Methods+in+Physics+Research+Section+A&rft.atitle=Big-bang+nucleosynthesis%3A+A+probe+of+the+early+Universe&rft.volume=611&rft.issue=2%E2%80%933&rft.pages=224-230&rft.date=2009&rft_id=info%3Adoi%2F10.1016%2Fj.nima.2009.07.052&rft_id=info%3Abibcode%2F2009NIMPA.611..224C&rft.aulast=Coc&rft.aufirst=Alain&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> <li id="cite_note-26"><span class="mw-cite-backlink"><b><a href="#cite_ref-26">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFEd_Kearns2009" class="citation web cs1">Ed Kearns (2009). <a rel="nofollow" class="external text" href="http://physics.bu.edu/NEPPSR/TALKS-2009/Kearns_GUTs_ProtonDecay.pdf">"Grand Unified Theories and Proton Decay"</a> <span class="cs1-format">(PDF)</span>. Boston University. p. 15.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Grand+Unified+Theories+and+Proton+Decay&rft.pages=15&rft.pub=Boston+University&rft.date=2009&rft.au=Ed+Kearns&rft_id=http%3A%2F%2Fphysics.bu.edu%2FNEPPSR%2FTALKS-2009%2FKearns_GUTs_ProtonDecay.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> <li id="cite_note-27"><span class="mw-cite-backlink"><b><a href="#cite_ref-27">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFThe_SNO+_CollaborationAndersonAndringaArushanova2019" class="citation journal cs1">The SNO+ Collaboration; Anderson, M.; Andringa, S.; Arushanova, E.; Asahi, S.; Askins, M.; Auty, D. J.; Back, A. R.; Barnard, Z.; Barros, N.; Bartlett, D. (2019-02-20). <a rel="nofollow" class="external text" href="https://doi.org/10.1103%2FPhysRevD.99.032008">"Search for invisible modes of nucleon decay in water with the SNO+ detector"</a>. <i>Physical Review D</i>. <b>99</b> (3): 032008. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/1812.05552">1812.05552</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2019PhRvD..99c2008A">2019PhRvD..99c2008A</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1103%2FPhysRevD.99.032008">10.1103/PhysRevD.99.032008</a></span>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:96457175">96457175</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Physical+Review+D&rft.atitle=Search+for+invisible+modes+of+nucleon+decay+in+water+with+the+SNO%2B+detector&rft.volume=99&rft.issue=3&rft.pages=032008&rft.date=2019-02-20&rft_id=info%3Aarxiv%2F1812.05552&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A96457175%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1103%2FPhysRevD.99.032008&rft_id=info%3Abibcode%2F2019PhRvD..99c2008A&rft.au=The+SNO%2B+Collaboration&rft.au=Anderson%2C+M.&rft.au=Andringa%2C+S.&rft.au=Arushanova%2C+E.&rft.au=Asahi%2C+S.&rft.au=Askins%2C+M.&rft.au=Auty%2C+D.+J.&rft.au=Back%2C+A.+R.&rft.au=Barnard%2C+Z.&rft.au=Barros%2C+N.&rft.au=Bartlett%2C+D.&rft_id=https%3A%2F%2Fdoi.org%2F10.1103%252FPhysRevD.99.032008&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> <li id="cite_note-BNT-28"><span class="mw-cite-backlink"><b><a href="#cite_ref-BNT_28-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFPfizer_Japan" class="citation web cs1">Pfizer Japan. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220324171847/http://www.pmda.go.jp/drugs/2021/P20210212001/672212000_30300AMX00231_I100_1.pdf#page=16">"SARS-CoV-2 mRNA Vaccine (BNT162, PF-07302048)"</a> <span class="cs1-format">(PDF)</span>. <i>Pharmaceuticals and Medical Devices Agency (Japan)</i>. 2.6.5.5B, pp. 6–8. Archived from <a rel="nofollow" class="external text" href="http://www.pmda.go.jp/drugs/2021/P20210212001/672212000_30300AMX00231_I100_1.pdf#page=16">the original</a> <span class="cs1-format">(PDF)</span> on 24 March 2022<span class="reference-accessdate">. Retrieved <span class="nowrap">5 June</span> 2021</span>. <q>[<sup>3</sup>H]-Labelled LNP-mRNA</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Pharmaceuticals+and+Medical+Devices+Agency+%28Japan%29&rft.atitle=SARS-CoV-2+mRNA+Vaccine+%28BNT162%2C+PF-07302048%29&rft.pages=2.6.5.5B%2C+pp.+6-8&rft.au=Pfizer+Japan&rft_id=http%3A%2F%2Fwww.pmda.go.jp%2Fdrugs%2F2021%2FP20210212001%2F672212000_30300AMX00231_I100_1.pdf%23page%3D16&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> <li id="cite_note-green20-29"><span class="mw-cite-backlink"><b><a href="#cite_ref-green20_29-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFGreenGreen2020" class="citation journal cs1">Green, Joanne Balmer; Green, Michael H. (2020). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7330459">"Vitamin A Absorption Determined in Rats Using a Plasma Isotope Ratio Method"</a>. <i>The Journal of Nutrition</i>. <b>150</b> (7): 1977–1981. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1093%2Fjn%2Fnxaa092">10.1093/jn/nxaa092</a>. <a href="/wiki/PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a> <span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7330459">7330459</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/32271921">32271921</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Journal+of+Nutrition&rft.atitle=Vitamin+A+Absorption+Determined+in+Rats+Using+a+Plasma+Isotope+Ratio+Method&rft.volume=150&rft.issue=7&rft.pages=1977-1981&rft.date=2020&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC7330459%23id-name%3DPMC&rft_id=info%3Apmid%2F32271921&rft_id=info%3Adoi%2F10.1093%2Fjn%2Fnxaa092&rft.aulast=Green&rft.aufirst=Joanne+Balmer&rft.au=Green%2C+Michael+H.&rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC7330459&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> <li id="cite_note-Ter-Akopian-30"><span class="mw-cite-backlink">^ <a href="#cite_ref-Ter-Akopian_30-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Ter-Akopian_30-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFG._M._Ter-Akopian2002" class="citation journal cs1">G. M. Ter-Akopian; et al. (2002). "Hydrogen-4 and Hydrogen-5 from t+t and t+d transfer reactions studied with a 57.5-MeV triton beam". <i><a href="/wiki/AIP_Conference_Proceedings" title="AIP Conference Proceedings">AIP Conference Proceedings</a></i>. <b>610</b>: 920–924. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2002AIPC..610..920T">2002AIPC..610..920T</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1063%2F1.1470062">10.1063/1.1470062</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=AIP+Conference+Proceedings&rft.atitle=Hydrogen-4+and+Hydrogen-5+from+t%2Bt+and+t%2Bd+transfer+reactions+studied+with+a+57.5-MeV+triton+beam&rft.volume=610&rft.pages=920-924&rft.date=2002&rft_id=info%3Adoi%2F10.1063%2F1.1470062&rft_id=info%3Abibcode%2F2002AIPC..610..920T&rft.au=G.+M.+Ter-Akopian&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> <li id="cite_note-31"><span class="mw-cite-backlink"><b><a href="#cite_ref-31">^</a></b></span> <span class="reference-text"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFA._A._Korsheninnikov2001" class="citation journal cs1">A. A. Korsheninnikov; et al. (2001). "Superheavy Hydrogen <sup>5</sup>H". <i><a href="/wiki/Physical_Review_Letters" title="Physical Review Letters">Physical Review Letters</a></i>. <b>87</b> (9): 92501. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2001PhRvL..87i2501K">2001PhRvL..87i2501K</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1103%2FPhysRevLett.87.092501">10.1103/PhysRevLett.87.092501</a>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/11531562">11531562</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Physical+Review+Letters&rft.atitle=Superheavy+Hydrogen+%3Csup%3E5%3C%2Fsup%3EH&rft.volume=87&rft.issue=9&rft.pages=92501&rft.date=2001&rft_id=info%3Apmid%2F11531562&rft_id=info%3Adoi%2F10.1103%2FPhysRevLett.87.092501&rft_id=info%3Abibcode%2F2001PhRvL..87i2501K&rft.au=A.+A.+Korsheninnikov&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Further_reading">Further reading</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Isotopes_of_hydrogen&action=edit&section=13" title="Edit section: Further reading"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFDumé2003" class="citation web cs1">Dumé, B. (7 March 2003). <span class="id-lock-registration" title="Free registration required"><a rel="nofollow" class="external text" href="http://physicsworld.com/cws/article/news/2003/mar/07/hydrogen-7-makes-its-debut">"Hydrogen-7 makes its debut"</a></span>. <i><a href="/wiki/Physics_World" title="Physics World">Physics World</a></i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Physics+World&rft.atitle=Hydrogen-7+makes+its+debut&rft.date=2003-03-07&rft.aulast=Dum%C3%A9&rft.aufirst=B.&rft_id=http%3A%2F%2Fphysicsworld.com%2Fcws%2Farticle%2Fnews%2F2003%2Fmar%2F07%2Fhydrogen-7-makes-its-debut&rfr_id=info%3Asid%2Fen.wikipedia.org%3AIsotopes+of+hydrogen" class="Z3988"></span></li></ul> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1236075235">.mw-parser-output .navbox{box-sizing:border-box;border:1px solid #a2a9b1;width:100%;clear:both;font-size:88%;text-align:center;padding:1px;margin:1em auto 0}.mw-parser-output .navbox .navbox{margin-top:0}.mw-parser-output .navbox+.navbox,.mw-parser-output .navbox+.navbox-styles+.navbox{margin-top:-1px}.mw-parser-output .navbox-inner,.mw-parser-output .navbox-subgroup{width:100%}.mw-parser-output .navbox-group,.mw-parser-output .navbox-title,.mw-parser-output .navbox-abovebelow{padding:0.25em 1em;line-height:1.5em;text-align:center}.mw-parser-output .navbox-group{white-space:nowrap;text-align:right}.mw-parser-output .navbox,.mw-parser-output .navbox-subgroup{background-color:#fdfdfd}.mw-parser-output .navbox-list{line-height:1.5em;border-color:#fdfdfd}.mw-parser-output .navbox-list-with-group{text-align:left;border-left-width:2px;border-left-style:solid}.mw-parser-output tr+tr>.navbox-abovebelow,.mw-parser-output tr+tr>.navbox-group,.mw-parser-output tr+tr>.navbox-image,.mw-parser-output tr+tr>.navbox-list{border-top:2px solid #fdfdfd}.mw-parser-output .navbox-title{background-color:#ccf}.mw-parser-output .navbox-abovebelow,.mw-parser-output .navbox-group,.mw-parser-output .navbox-subgroup .navbox-title{background-color:#ddf}.mw-parser-output .navbox-subgroup .navbox-group,.mw-parser-output .navbox-subgroup .navbox-abovebelow{background-color:#e6e6ff}.mw-parser-output .navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Isotopes_of_the_chemical_elements" style="padding:3px"><table class="nowraplinks mw-collapsible expanded navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Navbox_element_isotopes" title="Template:Navbox element isotopes"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Navbox_element_isotopes" title="Template talk:Navbox element isotopes"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Navbox_element_isotopes" title="Special:EditPage/Template:Navbox element isotopes"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Isotopes_of_the_chemical_elements" style="font-size:114%;margin:0 4em"><a href="/wiki/Isotope" title="Isotope">Isotopes</a> of the <a href="/wiki/Chemical_element" title="Chemical element">chemical elements</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0;line-height:110%;"><div style="padding:0 0.25em"> <table style="border-spacing:1px;display:block;overflow:auto;width:100%;margin:0 !important"> <tbody><tr style="line-height:125%; vertical-align:top;"> <th style="text-align:right; width:3%; background:transparent"><small><a href="/wiki/Group_(periodic_table)" title="Group (periodic table)">Group</a></small> </th> <th style="background:#e8e8e8; width:5%"><a href="/wiki/Alkali_metal" title="Alkali metal">1</a> </th> <th style="background:#f0f0f0; width:5%"><a href="/wiki/Alkaline_earth_metal" title="Alkaline earth metal">2</a> </th> <td style="width:2%">  </td> <th style="background:#e8e8e8; width:5%"><a href="/wiki/Group_3_element" title="Group 3 element">3</a> </th> <th style="background:#f0f0f0; width:5%"><a href="/wiki/Group_4_element" title="Group 4 element">4</a> </th> <th style="background:#e8e8e8; width:5%"><a href="/wiki/Group_5_element" title="Group 5 element">5</a> </th> <th style="background:#f0f0f0; width:5%"><a href="/wiki/Group_6_element" title="Group 6 element">6</a> </th> <th style="background:#e8e8e8; width:5%"><a href="/wiki/Group_7_element" title="Group 7 element">7</a> </th> <th style="background:#f0f0f0; width:5%"><a href="/wiki/Group_8_element" title="Group 8 element">8</a> </th> <th style="background:#e8e8e8; width:5%"><a href="/wiki/Group_9_element" title="Group 9 element">9</a> </th> <th style="background:#f0f0f0; width:5%"><a href="/wiki/Group_10_element" title="Group 10 element">10</a> </th> <th style="background:#e8e8e8; width:5%"><a href="/wiki/Group_11_element" title="Group 11 element">11</a> </th> <th style="background:#f0f0f0; width:5%"><a href="/wiki/Group_12_element" title="Group 12 element">12</a> </th> <th style="background:#e8e8e8; width:5%"><a href="/wiki/Boron_group" title="Boron group">13</a> </th> <th style="background:#f0f0f0; width:5%"><a href="/wiki/Carbon_group" title="Carbon group">14</a> </th> <th style="background:#e8e8e8; width:5%"><a href="/wiki/Pnictogen" title="Pnictogen">15</a> </th> <th style="background:#f0f0f0; width:5%"><a href="/wiki/Chalcogen" title="Chalcogen">16</a> </th> <th style="background:#e8e8e8; width:5%"><a href="/wiki/Halogen" title="Halogen">17</a> </th> <th style="background:#f0f0f0; width:5%"><a href="/wiki/Noble_gas" title="Noble gas">18</a> </th></tr> <tr style="font-size:85%; line-height:125%; vertical-align:top;"> <th style="text-align:left; vertical-align:bottom; background:transparent"><small><a href="/wiki/Period_(periodic_table)" title="Period (periodic table)">Period</a></small> </th> <td style="background:#e8e8e8;">Hydrogen and<br />alkali metals </td> <td style="background:#f0f0f0;">Alkaline<br />earth metals </td> <td> </td> <td style="background:#e8e8e8;"> </td> <td style="background:#f0f0f0;"> </td> <td style="background:#e8e8e8;"> </td> <td style="background:#f0f0f0;"> </td> <td style="background:#e8e8e8;"> </td> <td style="background:#f0f0f0;"> </td> <td style="background:#e8e8e8;"> </td> <td style="background:#f0f0f0;"> </td> <td style="background:#e8e8e8;"> </td> <td style="background:#f0f0f0;"> </td> <td style="background:#e8e8e8;"> </td> <td style="background:#f0f0f0;"> </td> <td style="background:#e8e8e8;">Pnictogens </td> <td style="background:#f0f0f0;">Chalcogens </td> <td style="background:#e8e8e8;">Halogens </td> <td style="background:#f0f0f0;">Noble gases </td></tr> <tr> <th style="background:transparent"><span title="Period ①" class="nounderlines" style="font-size:150%;"><a href="/wiki/Period_1_element" title="Period 1 element">①</a></span> </th> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a class="mw-selflink selflink">Isotopes</a>  <a class="mw-selflink-fragment" href="#List_of_isotopes">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Hydrogen" title="Hydrogen">H</a></b></div>1 </td> <td colspan="17"> </td> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_helium" title="Isotopes of helium">Isotopes</a>  <a href="/wiki/Isotopes_of_helium#List_of_isotopes" title="Isotopes of helium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Helium" title="Helium">He</a></b></div>2 </td></tr> <tr> <th style="background:transparent"><span title="Period ②" class="nounderlines" style="font-size:150%;"><a href="/wiki/Period_2_element" title="Period 2 element">②</a></span> </th> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_lithium" title="Isotopes of lithium">Isotopes</a>  <a href="/wiki/Isotopes_of_lithium#List_of_isotopes" title="Isotopes of lithium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Lithium" title="Lithium">Li</a></b></div>3 </td> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_beryllium" title="Isotopes of beryllium">Isotopes</a>  <a href="/wiki/Isotopes_of_beryllium#List_of_isotopes" title="Isotopes of beryllium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Beryllium" title="Beryllium">Be</a></b></div>4 </td> <td colspan="11"> </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_boron" title="Isotopes of boron">Isotopes</a>  <a href="/wiki/Isotopes_of_boron#List_of_isotopes" title="Isotopes of boron">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Boron" title="Boron">B</a></b></div>5 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_carbon" title="Isotopes of carbon">Isotopes</a>  <a href="/wiki/Isotopes_of_carbon#List_of_isotopes" title="Isotopes of carbon">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Carbon" title="Carbon">C</a></b></div>6 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_nitrogen" title="Isotopes of nitrogen">Isotopes</a>  <a href="/wiki/Isotopes_of_nitrogen#List_of_isotopes" title="Isotopes of nitrogen">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Nitrogen" title="Nitrogen">N</a></b></div>7 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_oxygen" title="Isotopes of oxygen">Isotopes</a>  <a href="/wiki/Isotopes_of_oxygen#List_of_isotopes" title="Isotopes of oxygen">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Oxygen" title="Oxygen">O</a></b></div>8 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_fluorine" title="Isotopes of fluorine">Isotopes</a>  <a href="/wiki/Isotopes_of_fluorine#List_of_isotopes" title="Isotopes of fluorine">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Fluorine" title="Fluorine">F</a></b></div>9 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_neon" title="Isotopes of neon">Isotopes</a>  <a href="/wiki/Isotopes_of_neon#List_of_isotopes" title="Isotopes of neon">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Neon" title="Neon">Ne</a></b></div>10 </td></tr> <tr> <th style="background:transparent"><span title="Period ③" class="nounderlines" style="font-size:150%;"><a href="/wiki/Period_3_element" title="Period 3 element">③</a></span> </th> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_sodium" title="Isotopes of sodium">Isotopes</a>  <a href="/wiki/Isotopes_of_sodium#List_of_isotopes" title="Isotopes of sodium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Sodium" title="Sodium">Na</a></b></div>11 </td> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_magnesium" title="Isotopes of magnesium">Isotopes</a>  <a href="/wiki/Isotopes_of_magnesium#List_of_isotopes" title="Isotopes of magnesium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Magnesium" title="Magnesium">Mg</a></b></div>12 </td> <td colspan="11"> </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_aluminium" title="Isotopes of aluminium">Isotopes</a>  <a href="/wiki/Isotopes_of_aluminium#List_of_isotopes" title="Isotopes of aluminium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Aluminium" title="Aluminium">Al</a></b></div>13 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_silicon" title="Isotopes of silicon">Isotopes</a>  <a href="/wiki/Isotopes_of_silicon#List_of_isotopes" title="Isotopes of silicon">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Silicon" title="Silicon">Si</a></b></div>14 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_phosphorus" title="Isotopes of phosphorus">Isotopes</a>  <a href="/wiki/Isotopes_of_phosphorus#List_of_isotopes" title="Isotopes of phosphorus">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Phosphorus" title="Phosphorus">P</a></b></div>15 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_sulfur" title="Isotopes of sulfur">Isotopes</a>  <a href="/wiki/Isotopes_of_sulfur#List_of_isotopes" title="Isotopes of sulfur">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Sulfur" title="Sulfur">S</a></b></div>16 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_chlorine" title="Isotopes of chlorine">Isotopes</a>  <a href="/wiki/Isotopes_of_chlorine#List_of_isotopes" title="Isotopes of chlorine">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Chlorine" title="Chlorine">Cl</a></b></div>17 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_argon" title="Isotopes of argon">Isotopes</a>  <a href="/wiki/Isotopes_of_argon#List_of_isotopes" title="Isotopes of argon">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Argon" title="Argon">Ar</a></b></div>18 </td></tr> <tr> <th style="background:transparent"><span title="Period ④" class="nounderlines" style="font-size:150%;"><a href="/wiki/Period_4_element" title="Period 4 element">④</a></span> </th> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_potassium" title="Isotopes of potassium">Isotopes</a>  <a href="/wiki/Isotopes_of_potassium#List_of_isotopes" title="Isotopes of potassium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Potassium" title="Potassium">K</a></b></div>19 </td> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_calcium" title="Isotopes of calcium">Isotopes</a>  <a href="/wiki/Isotopes_of_calcium#List_of_isotopes" title="Isotopes of calcium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Calcium" title="Calcium">Ca</a></b></div>20 </td> <td> </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_scandium" title="Isotopes of scandium">Isotopes</a>  <a href="/wiki/Isotopes_of_scandium#List_of_isotopes" title="Isotopes of scandium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Scandium" title="Scandium">Sc</a></b></div>21 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_titanium" title="Isotopes of titanium">Isotopes</a>  <a href="/wiki/Isotopes_of_titanium#List_of_isotopes" title="Isotopes of titanium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Titanium" title="Titanium">Ti</a></b></div>22 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_vanadium" title="Isotopes of vanadium">Isotopes</a>  <a href="/wiki/Isotopes_of_vanadium#List_of_isotopes" title="Isotopes of vanadium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Vanadium" title="Vanadium">V</a></b></div>23 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_chromium" title="Isotopes of chromium">Isotopes</a>  <a href="/wiki/Isotopes_of_chromium#List_of_isotopes" title="Isotopes of chromium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Chromium" title="Chromium">Cr</a></b></div>24 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_manganese" title="Isotopes of manganese">Isotopes</a>  <a href="/wiki/Isotopes_of_manganese#List_of_isotopes" title="Isotopes of manganese">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Manganese" title="Manganese">Mn</a></b></div>25 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_iron" title="Isotopes of iron">Isotopes</a>  <a href="/wiki/Isotopes_of_iron#List_of_isotopes" title="Isotopes of iron">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Iron" title="Iron">Fe</a></b></div>26 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_cobalt" title="Isotopes of cobalt">Isotopes</a>  <a href="/wiki/Isotopes_of_cobalt#List_of_isotopes" title="Isotopes of cobalt">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Cobalt" title="Cobalt">Co</a></b></div>27 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_nickel" title="Isotopes of nickel">Isotopes</a>  <a href="/wiki/Isotopes_of_nickel#List_of_isotopes" title="Isotopes of nickel">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Nickel" title="Nickel">Ni</a></b></div>28 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_copper" title="Isotopes of copper">Isotopes</a>  <a href="/wiki/Isotopes_of_copper#List_of_isotopes" title="Isotopes of copper">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Copper" title="Copper">Cu</a></b></div>29 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_zinc" title="Isotopes of zinc">Isotopes</a>  <a href="/wiki/Isotopes_of_zinc#List_of_isotopes" title="Isotopes of zinc">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Zinc" title="Zinc">Zn</a></b></div>30 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_gallium" title="Isotopes of gallium">Isotopes</a>  <a href="/wiki/Isotopes_of_gallium#List_of_isotopes" title="Isotopes of gallium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Gallium" title="Gallium">Ga</a></b></div>31 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_germanium" title="Isotopes of germanium">Isotopes</a>  <a href="/wiki/Isotopes_of_germanium#List_of_isotopes" title="Isotopes of germanium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Germanium" title="Germanium">Ge</a></b></div>32 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_arsenic" title="Isotopes of arsenic">Isotopes</a>  <a href="/wiki/Isotopes_of_arsenic#List_of_isotopes" title="Isotopes of arsenic">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Arsenic" title="Arsenic">As</a></b></div>33 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_selenium" title="Isotopes of selenium">Isotopes</a>  <a href="/wiki/Isotopes_of_selenium#List_of_isotopes" title="Isotopes of selenium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Selenium" title="Selenium">Se</a></b></div>34 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_bromine" title="Isotopes of bromine">Isotopes</a>  <a href="/wiki/Isotopes_of_bromine#List_of_isotopes" title="Isotopes of bromine">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Bromine" title="Bromine">Br</a></b></div>35 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_krypton" title="Isotopes of krypton">Isotopes</a>  <a href="/wiki/Isotopes_of_krypton#List_of_isotopes" title="Isotopes of krypton">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Krypton" title="Krypton">Kr</a></b></div>36 </td></tr> <tr> <th style="background:transparent"><span title="Period ⑤" class="nounderlines" style="font-size:150%;"><a href="/wiki/Period_5_element" title="Period 5 element">⑤</a></span> </th> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_rubidium" title="Isotopes of rubidium">Isotopes</a>  <a href="/wiki/Isotopes_of_rubidium#List_of_isotopes" title="Isotopes of rubidium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Rubidium" title="Rubidium">Rb</a></b></div>37 </td> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_strontium" title="Isotopes of strontium">Isotopes</a>  <a href="/wiki/Isotopes_of_strontium#List_of_isotopes" title="Isotopes of strontium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Strontium" title="Strontium">Sr</a></b></div>38 </td> <td> </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_yttrium" title="Isotopes of yttrium">Isotopes</a>  <a href="/wiki/Isotopes_of_yttrium#List_of_isotopes" title="Isotopes of yttrium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Yttrium" title="Yttrium">Y</a></b></div>39 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_zirconium" title="Isotopes of zirconium">Isotopes</a>  <a href="/wiki/Isotopes_of_zirconium#List_of_isotopes" title="Isotopes of zirconium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Zirconium" title="Zirconium">Zr</a></b></div>40 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_niobium" title="Isotopes of niobium">Isotopes</a>  <a href="/wiki/Isotopes_of_niobium#List_of_isotopes" title="Isotopes of niobium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Niobium" title="Niobium">Nb</a></b></div>41 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_molybdenum" title="Isotopes of molybdenum">Isotopes</a>  <a href="/wiki/Isotopes_of_molybdenum#List_of_isotopes" title="Isotopes of molybdenum">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Molybdenum" title="Molybdenum">Mo</a></b></div>42 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_technetium" title="Isotopes of technetium">Isotopes</a>  <a href="/wiki/Isotopes_of_technetium#List_of_isotopes" title="Isotopes of technetium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Technetium" title="Technetium">Tc</a></b></div>43 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_ruthenium" title="Isotopes of ruthenium">Isotopes</a>  <a href="/wiki/Isotopes_of_ruthenium#List_of_isotopes" title="Isotopes of ruthenium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Ruthenium" title="Ruthenium">Ru</a></b></div>44 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_rhodium" title="Isotopes of rhodium">Isotopes</a>  <a href="/wiki/Isotopes_of_rhodium#List_of_isotopes" title="Isotopes of rhodium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Rhodium" title="Rhodium">Rh</a></b></div>45 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_palladium" title="Isotopes of palladium">Isotopes</a>  <a href="/wiki/Isotopes_of_palladium#List_of_isotopes" title="Isotopes of palladium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Palladium" title="Palladium">Pd</a></b></div>46 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_silver" title="Isotopes of silver">Isotopes</a>  <a href="/wiki/Isotopes_of_silver#List_of_isotopes" title="Isotopes of silver">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Silver" title="Silver">Ag</a></b></div>47 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_cadmium" title="Isotopes of cadmium">Isotopes</a>  <a href="/wiki/Isotopes_of_cadmium#List_of_isotopes" title="Isotopes of cadmium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Cadmium" title="Cadmium">Cd</a></b></div>48 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_indium" title="Isotopes of indium">Isotopes</a>  <a href="/wiki/Isotopes_of_indium#List_of_isotopes" title="Isotopes of indium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Indium" title="Indium">In</a></b></div>49 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_tin" title="Isotopes of tin">Isotopes</a>  <a href="/wiki/Isotopes_of_tin#List_of_isotopes" title="Isotopes of tin">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Tin" title="Tin">Sn</a></b></div>50 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_antimony" title="Isotopes of antimony">Isotopes</a>  <a href="/wiki/Isotopes_of_antimony#List_of_isotopes" title="Isotopes of antimony">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Antimony" title="Antimony">Sb</a></b></div>51 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_tellurium" title="Isotopes of tellurium">Isotopes</a>  <a href="/wiki/Isotopes_of_tellurium#List_of_isotopes" title="Isotopes of tellurium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Tellurium" title="Tellurium">Te</a></b></div>52 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_iodine" title="Isotopes of iodine">Isotopes</a>  <a href="/wiki/Isotopes_of_iodine#List_of_isotopes" title="Isotopes of iodine">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Iodine" title="Iodine">I</a></b></div>53 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_xenon" title="Isotopes of xenon">Isotopes</a>  <a href="/wiki/Isotopes_of_xenon#List_of_isotopes" title="Isotopes of xenon">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Xenon" title="Xenon">Xe</a></b></div>54 </td></tr> <tr> <th style="background:transparent"><span title="Period ⑥" class="nounderlines" style="font-size:150%;"><a href="/wiki/Period_6_element" title="Period 6 element">⑥</a></span> </th> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_caesium" title="Isotopes of caesium">Isotopes</a>  <a href="/wiki/Isotopes_of_caesium#List_of_isotopes" title="Isotopes of caesium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Caesium" title="Caesium">Cs</a></b></div>55 </td> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_barium" title="Isotopes of barium">Isotopes</a>  <a href="/wiki/Isotopes_of_barium#List_of_isotopes" title="Isotopes of barium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Barium" title="Barium">Ba</a></b></div>56 </td> <td style="text-align:center; vertical-align:middle; background:#9bff99;"><span class="skin-invert-image" typeof="mw:File"><span><img alt="1 asterisk" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/49/Asterisks_one.svg/16px-Asterisks_one.svg.png" decoding="async" width="16" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/49/Asterisks_one.svg/24px-Asterisks_one.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/49/Asterisks_one.svg/32px-Asterisks_one.svg.png 2x" data-file-width="106" data-file-height="98" /></span></span> </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_lutetium" title="Isotopes of lutetium">Isotopes</a>  <a href="/wiki/Isotopes_of_lutetium#List_of_isotopes" title="Isotopes of lutetium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Lutetium" title="Lutetium">Lu</a></b></div>71 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_hafnium" title="Isotopes of hafnium">Isotopes</a>  <a href="/wiki/Isotopes_of_hafnium#List_of_isotopes" title="Isotopes of hafnium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Hafnium" title="Hafnium">Hf</a></b></div>72 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_tantalum" title="Isotopes of tantalum">Isotopes</a>  <a href="/wiki/Isotopes_of_tantalum#List_of_isotopes" title="Isotopes of tantalum">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Tantalum" title="Tantalum">Ta</a></b></div>73 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_tungsten" title="Isotopes of tungsten">Isotopes</a>  <a href="/wiki/Isotopes_of_tungsten#List_of_isotopes" title="Isotopes of tungsten">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Tungsten" title="Tungsten">W</a></b></div>74 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_rhenium" title="Isotopes of rhenium">Isotopes</a>  <a href="/wiki/Isotopes_of_rhenium#List_of_isotopes" title="Isotopes of rhenium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Rhenium" title="Rhenium">Re</a></b></div>75 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_osmium" title="Isotopes of osmium">Isotopes</a>  <a href="/wiki/Isotopes_of_osmium#List_of_isotopes" title="Isotopes of osmium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Osmium" title="Osmium">Os</a></b></div>76 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_iridium" title="Isotopes of iridium">Isotopes</a>  <a href="/wiki/Isotopes_of_iridium#List_of_isotopes" title="Isotopes of iridium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Iridium" title="Iridium">Ir</a></b></div>77 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_platinum" title="Isotopes of platinum">Isotopes</a>  <a href="/wiki/Isotopes_of_platinum#List_of_isotopes" title="Isotopes of platinum">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Platinum" title="Platinum">Pt</a></b></div>78 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_gold" title="Isotopes of gold">Isotopes</a>  <a href="/wiki/Isotopes_of_gold#List_of_isotopes" title="Isotopes of gold">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Gold" title="Gold">Au</a></b></div>79 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_mercury" title="Isotopes of mercury">Isotopes</a>  <a href="/wiki/Isotopes_of_mercury#List_of_isotopes" title="Isotopes of mercury">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Mercury_(element)" title="Mercury (element)">Hg</a></b></div>80 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_thallium" title="Isotopes of thallium">Isotopes</a>  <a href="/wiki/Isotopes_of_thallium#List_of_isotopes" title="Isotopes of thallium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Thallium" title="Thallium">Tl</a></b></div>81 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_lead" title="Isotopes of lead">Isotopes</a>  <a href="/wiki/Isotopes_of_lead#List_of_isotopes" title="Isotopes of lead">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Lead" title="Lead">Pb</a></b></div>82 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_bismuth" title="Isotopes of bismuth">Isotopes</a>  <a href="/wiki/Isotopes_of_bismuth#List_of_isotopes" title="Isotopes of bismuth">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Bismuth" title="Bismuth">Bi</a></b></div>83 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_polonium" title="Isotopes of polonium">Isotopes</a>  <a href="/wiki/Isotopes_of_polonium#List_of_isotopes" title="Isotopes of polonium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Polonium" title="Polonium">Po</a></b></div>84 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_astatine" title="Isotopes of astatine">Isotopes</a>  <a href="/wiki/Isotopes_of_astatine#List_of_isotopes" title="Isotopes of astatine">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Astatine" title="Astatine">At</a></b></div>85 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_radon" title="Isotopes of radon">Isotopes</a>  <a href="/wiki/Isotopes_of_radon#List_of_isotopes" title="Isotopes of radon">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Radon" title="Radon">Rn</a></b></div>86 </td></tr> <tr> <th style="background:transparent"><span title="Period ⑦" class="nounderlines" style="font-size:150%;"><a href="/wiki/Period_7_element" title="Period 7 element">⑦</a></span> </th> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_francium" title="Isotopes of francium">Isotopes</a>  <a href="/wiki/Isotopes_of_francium#List_of_isotopes" title="Isotopes of francium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Francium" title="Francium">Fr</a></b></div>87 </td> <td style="padding-left:0.1em; background:#ff9999;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_radium" title="Isotopes of radium">Isotopes</a>  <a href="/wiki/Isotopes_of_radium#List_of_isotopes" title="Isotopes of radium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Radium" title="Radium">Ra</a></b></div>88 </td> <td style="text-align:center; vertical-align:middle; background:#9bff99;"><span class="skin-invert-image" typeof="mw:File"><span><img alt="1 asterisk" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Asterisks_2_%28vertical%29.svg/16px-Asterisks_2_%28vertical%29.svg.png" decoding="async" width="16" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Asterisks_2_%28vertical%29.svg/24px-Asterisks_2_%28vertical%29.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Asterisks_2_%28vertical%29.svg/32px-Asterisks_2_%28vertical%29.svg.png 2x" data-file-width="106" data-file-height="98" /></span></span> </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_lawrencium" title="Isotopes of lawrencium">Isotopes</a>  <a href="/wiki/Isotopes_of_lawrencium#List_of_isotopes" title="Isotopes of lawrencium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Lawrencium" title="Lawrencium">Lr</a></b></div>103 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_rutherfordium" title="Isotopes of rutherfordium">Isotopes</a>  <a href="/wiki/Isotopes_of_rutherfordium#List_of_isotopes" title="Isotopes of rutherfordium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Rutherfordium" title="Rutherfordium">Rf</a></b></div>104 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_dubnium" title="Isotopes of dubnium">Isotopes</a>  <a href="/wiki/Isotopes_of_dubnium#List_of_isotopes" title="Isotopes of dubnium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Dubnium" title="Dubnium">Db</a></b></div>105 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_seaborgium" title="Isotopes of seaborgium">Isotopes</a>  <a href="/wiki/Isotopes_of_seaborgium#List_of_isotopes" title="Isotopes of seaborgium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Seaborgium" title="Seaborgium">Sg</a></b></div>106 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_bohrium" title="Isotopes of bohrium">Isotopes</a>  <a href="/wiki/Isotopes_of_bohrium#List_of_isotopes" title="Isotopes of bohrium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Bohrium" title="Bohrium">Bh</a></b></div>107 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_hassium" title="Isotopes of hassium">Isotopes</a>  <a href="/wiki/Isotopes_of_hassium#List_of_isotopes" title="Isotopes of hassium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Hassium" title="Hassium">Hs</a></b></div>108 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_meitnerium" title="Isotopes of meitnerium">Isotopes</a>  <a href="/wiki/Isotopes_of_meitnerium#List_of_isotopes" title="Isotopes of meitnerium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Meitnerium" title="Meitnerium">Mt</a></b></div>109 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_darmstadtium" title="Isotopes of darmstadtium">Isotopes</a>  <a href="/wiki/Isotopes_of_darmstadtium#List_of_isotopes" title="Isotopes of darmstadtium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Darmstadtium" title="Darmstadtium">Ds</a></b></div>110 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_roentgenium" title="Isotopes of roentgenium">Isotopes</a>  <a href="/wiki/Isotopes_of_roentgenium#List_of_isotopes" title="Isotopes of roentgenium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Roentgenium" title="Roentgenium">Rg</a></b></div>111 </td> <td style="padding-left:0.1em; background:#99ccff;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_copernicium" title="Isotopes of copernicium">Isotopes</a>  <a href="/wiki/Isotopes_of_copernicium#List_of_isotopes" title="Isotopes of copernicium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Copernicium" title="Copernicium">Cn</a></b></div>112 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_nihonium" title="Isotopes of nihonium">Isotopes</a>  <a href="/wiki/Isotopes_of_nihonium#List_of_isotopes" title="Isotopes of nihonium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Nihonium" title="Nihonium">Nh</a></b></div>113 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_flerovium" title="Isotopes of flerovium">Isotopes</a>  <a href="/wiki/Isotopes_of_flerovium#List_of_isotopes" title="Isotopes of flerovium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Flerovium" title="Flerovium">Fl</a></b></div>114 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_moscovium" title="Isotopes of moscovium">Isotopes</a>  <a href="/wiki/Isotopes_of_moscovium#List_of_isotopes" title="Isotopes of moscovium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Moscovium" title="Moscovium">Mc</a></b></div>115 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_livermorium" title="Isotopes of livermorium">Isotopes</a>  <a href="/wiki/Isotopes_of_livermorium#List_of_isotopes" title="Isotopes of livermorium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Livermorium" title="Livermorium">Lv</a></b></div>116 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_tennessine" title="Isotopes of tennessine">Isotopes</a>  <a href="/wiki/Isotopes_of_tennessine#List_of_isotopes" title="Isotopes of tennessine">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Tennessine" title="Tennessine">Ts</a></b></div>117 </td> <td style="padding-left:0.1em; background:#fdff8c;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_oganesson" title="Isotopes of oganesson">Isotopes</a>  <a href="/wiki/Isotopes_of_oganesson#List_of_isotopes" title="Isotopes of oganesson">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Oganesson" title="Oganesson">Og</a></b></div>118 </td></tr> <tr> <th style="background:transparent"><span title="Period ⑧" class="nounderlines" style="font-size:150%;"><a href="/wiki/Period_8_element" class="mw-redirect" title="Period 8 element">⑧</a></span> </th> <td style="padding-left:0.1em; background:#eee;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_ununennium" title="Isotopes of ununennium">Isotopes</a>  <a href="/wiki/Isotopes_of_ununennium#List_of_isotopes" title="Isotopes of ununennium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Ununennium" title="Ununennium">Uue</a></b></div>119 </td> <td style="padding-left:0.1em; background:#eee;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_unbinilium" title="Isotopes of unbinilium">Isotopes</a>  <a href="/wiki/Isotopes_of_unbinilium#List_of_isotopes" title="Isotopes of unbinilium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Unbinilium" title="Unbinilium">Ubn</a></b></div>120 </td></tr> <tr> <td colspan="20" style="height:1.4em;"> </td></tr> <tr> <td> </td> <td> </td> <td> </td> <td style="text-align:center; vertical-align:middle;"><span class="skin-invert-image" typeof="mw:File"><span><img alt="1 asterisk" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/49/Asterisks_one.svg/16px-Asterisks_one.svg.png" decoding="async" width="16" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/49/Asterisks_one.svg/24px-Asterisks_one.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/49/Asterisks_one.svg/32px-Asterisks_one.svg.png 2x" data-file-width="106" data-file-height="98" /></span></span> </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_lanthanum" title="Isotopes of lanthanum">Isotopes</a>  <a href="/wiki/Isotopes_of_lanthanum#List_of_isotopes" title="Isotopes of lanthanum">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Lanthanum" title="Lanthanum">La</a></b></div>57 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_cerium" title="Isotopes of cerium">Isotopes</a>  <a href="/wiki/Isotopes_of_cerium#List_of_isotopes" title="Isotopes of cerium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Cerium" title="Cerium">Ce</a></b></div>58 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_praseodymium" title="Isotopes of praseodymium">Isotopes</a>  <a href="/wiki/Isotopes_of_praseodymium#List_of_isotopes" title="Isotopes of praseodymium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Praseodymium" title="Praseodymium">Pr</a></b></div>59 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_neodymium" title="Isotopes of neodymium">Isotopes</a>  <a href="/wiki/Isotopes_of_neodymium#List_of_isotopes" title="Isotopes of neodymium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Neodymium" title="Neodymium">Nd</a></b></div>60 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_promethium" title="Isotopes of promethium">Isotopes</a>  <a href="/wiki/Isotopes_of_promethium#List_of_isotopes" title="Isotopes of promethium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Promethium" title="Promethium">Pm</a></b></div>61 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_samarium" title="Isotopes of samarium">Isotopes</a>  <a href="/wiki/Isotopes_of_samarium#List_of_isotopes" title="Isotopes of samarium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Samarium" title="Samarium">Sm</a></b></div>62 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_europium" title="Isotopes of europium">Isotopes</a>  <a href="/wiki/Isotopes_of_europium#List_of_isotopes" title="Isotopes of europium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Europium" title="Europium">Eu</a></b></div>63 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_gadolinium" title="Isotopes of gadolinium">Isotopes</a>  <a href="/wiki/Isotopes_of_gadolinium#List_of_isotopes" title="Isotopes of gadolinium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Gadolinium" title="Gadolinium">Gd</a></b></div>64 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_terbium" title="Isotopes of terbium">Isotopes</a>  <a href="/wiki/Isotopes_of_terbium#List_of_isotopes" title="Isotopes of terbium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Terbium" title="Terbium">Tb</a></b></div>65 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_dysprosium" title="Isotopes of dysprosium">Isotopes</a>  <a href="/wiki/Isotopes_of_dysprosium#List_of_isotopes" title="Isotopes of dysprosium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Dysprosium" title="Dysprosium">Dy</a></b></div>66 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_holmium" title="Isotopes of holmium">Isotopes</a>  <a href="/wiki/Isotopes_of_holmium#List_of_isotopes" title="Isotopes of holmium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Holmium" title="Holmium">Ho</a></b></div>67 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_erbium" title="Isotopes of erbium">Isotopes</a>  <a href="/wiki/Isotopes_of_erbium#List_of_isotopes" title="Isotopes of erbium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Erbium" title="Erbium">Er</a></b></div>68 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_thulium" title="Isotopes of thulium">Isotopes</a>  <a href="/wiki/Isotopes_of_thulium#List_of_isotopes" title="Isotopes of thulium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Thulium" title="Thulium">Tm</a></b></div>69 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_ytterbium" title="Isotopes of ytterbium">Isotopes</a>  <a href="/wiki/Isotopes_of_ytterbium#List_of_isotopes" title="Isotopes of ytterbium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Ytterbium" title="Ytterbium">Yb</a></b></div>70 </td> <td>  </td></tr> <tr> <td colspan="3"> </td> <td style="text-align:center; vertical-align:middle;"><span class="skin-invert-image" typeof="mw:File"><span><img alt="1 asterisk" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Asterisks_2_%28vertical%29.svg/16px-Asterisks_2_%28vertical%29.svg.png" decoding="async" width="16" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Asterisks_2_%28vertical%29.svg/24px-Asterisks_2_%28vertical%29.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Asterisks_2_%28vertical%29.svg/32px-Asterisks_2_%28vertical%29.svg.png 2x" data-file-width="106" data-file-height="98" /></span></span> </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_actinium" title="Isotopes of actinium">Isotopes</a>  <a href="/wiki/Isotopes_of_actinium#List_of_isotopes" title="Isotopes of actinium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Actinium" title="Actinium">Ac</a></b></div>89 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_thorium" title="Isotopes of thorium">Isotopes</a>  <a href="/wiki/Isotopes_of_thorium#List_of_isotopes" title="Isotopes of thorium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Thorium" title="Thorium">Th</a></b></div>90 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_protactinium" title="Isotopes of protactinium">Isotopes</a>  <a href="/wiki/Isotopes_of_protactinium#List_of_isotopes" title="Isotopes of protactinium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Protactinium" title="Protactinium">Pa</a></b></div>91 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_uranium" title="Isotopes of uranium">Isotopes</a>  <a href="/wiki/Isotopes_of_uranium#List_of_isotopes" title="Isotopes of uranium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Uranium" title="Uranium">U</a></b></div>92 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_neptunium" title="Isotopes of neptunium">Isotopes</a>  <a href="/wiki/Isotopes_of_neptunium#List_of_isotopes" title="Isotopes of neptunium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Neptunium" title="Neptunium">Np</a></b></div>93 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_plutonium" title="Isotopes of plutonium">Isotopes</a>  <a href="/wiki/Isotopes_of_plutonium#List_of_isotopes" title="Isotopes of plutonium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Plutonium" title="Plutonium">Pu</a></b></div>94 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_americium" title="Isotopes of americium">Isotopes</a>  <a href="/wiki/Isotopes_of_americium#List_of_isotopes" title="Isotopes of americium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Americium" title="Americium">Am</a></b></div>95 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_curium" title="Isotopes of curium">Isotopes</a>  <a href="/wiki/Isotopes_of_curium#List_of_isotopes" title="Isotopes of curium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Curium" title="Curium">Cm</a></b></div>96 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_berkelium" title="Isotopes of berkelium">Isotopes</a>  <a href="/wiki/Isotopes_of_berkelium#List_of_isotopes" title="Isotopes of berkelium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Berkelium" title="Berkelium">Bk</a></b></div>97 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_californium" title="Isotopes of californium">Isotopes</a>  <a href="/wiki/Isotopes_of_californium#List_of_isotopes" title="Isotopes of californium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Californium" title="Californium">Cf</a></b></div>98 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_einsteinium" title="Isotopes of einsteinium">Isotopes</a>  <a href="/wiki/Isotopes_of_einsteinium#List_of_isotopes" title="Isotopes of einsteinium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Einsteinium" title="Einsteinium">Es</a></b></div>99 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_fermium" title="Isotopes of fermium">Isotopes</a>  <a href="/wiki/Isotopes_of_fermium#List_of_isotopes" title="Isotopes of fermium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Fermium" title="Fermium">Fm</a></b></div>100 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_mendelevium" title="Isotopes of mendelevium">Isotopes</a>  <a href="/wiki/Isotopes_of_mendelevium#List_of_isotopes" title="Isotopes of mendelevium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Mendelevium" title="Mendelevium">Md</a></b></div>101 </td> <td style="padding-left:0.1em; background:#9bff99;"><div style="text-align:left"><small><a href="/wiki/Isotopes_of_nobelium" title="Isotopes of nobelium">Isotopes</a>  <a href="/wiki/Isotopes_of_nobelium#List_of_isotopes" title="Isotopes of nobelium">§ List</a></small></div><div style="display:block"><b><a href="/wiki/Nobelium" title="Nobelium">No</a></b></div>102 </td></tr></tbody></table> </div></td></tr><tr><td class="navbox-abovebelow hlist" colspan="2" style="background:#f0f0f0;"><div> <ul><li><a href="/wiki/Table_of_nuclides" title="Table of nuclides">Table of nuclides</a></li> <li>Categories: <a href="/wiki/Category:Isotopes" title="Category:Isotopes">Isotopes</a></li> <li><a href="/wiki/Category:Tables_of_nuclides" title="Category:Tables of nuclides">Tables of nuclides</a></li> <li><a href="/wiki/Category:Metastable_isotopes" title="Category:Metastable isotopes">Metastable isotopes</a></li> <li><a href="/wiki/Category:Lists_of_isotopes_by_element" title="Category:Lists of isotopes by element">Isotopes by element</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox authority-control" aria-label="Navbox" style="padding:3px"><table class="nowraplinks hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Help:Authority_control" title="Help:Authority control">Authority control databases</a>: National <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q466603#identifiers" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><ul><li><span class="uid"><a rel="nofollow" class="external text" href="https://d-nb.info/gnd/4189274-4">Germany</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://id.loc.gov/authorities/sh85063419">United States</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="http://olduli.nli.org.il/F/?func=find-b&local_base=NLX10&find_code=UID&request=987007533740705171">Israel</a></span></li></ul></div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; 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