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sitedir-ltr mw-hide-empty-elt ns-0 ns-subject mw-editable page-Heli rootpage-Heli skin-vector-2022 action-view"><a class="mw-jump-link" href="#bodyContent">Vés al contingut</a> <div class="vector-header-container"> <header class="vector-header mw-header"> <div class="vector-header-start"> <nav class="vector-main-menu-landmark" aria-label="Lloc"> <div id="vector-main-menu-dropdown" class="vector-dropdown vector-main-menu-dropdown vector-button-flush-left vector-button-flush-right" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Menú principal" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Menú principal</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Menú principal</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">amaga</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navegació </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Portada" title="Visiteu la pàgina principal [z]" accesskey="z"><span>Portada</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Especial:Article_aleatori" title="Carrega una pàgina a l’atzar [x]" accesskey="x"><span>Article a l'atzar</span></a></li><li id="n-Articles-de-qualitat" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Articles_de_qualitat"><span>Articles de qualitat</span></a></li> </ul> </div> </div> <div id="p-Comunitat" class="vector-menu mw-portlet mw-portlet-Comunitat" > <div class="vector-menu-heading"> Comunitat </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-portal" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Portal" title="Sobre el projecte, què podeu fer, on trobareu les coses"><span>Portal viquipedista</span></a></li><li id="n-Agenda-d'actes" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Trobades"><span>Agenda d'actes</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Especial:Canvis_recents" title="Una llista dels canvis recents al wiki [r]" accesskey="r"><span>Canvis recents</span></a></li><li id="n-La-taverna" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:La_taverna"><span>La taverna</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Contacte"><span>Contacte</span></a></li><li id="n-Xat" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Canals_IRC"><span>Xat</span></a></li><li id="n-help" class="mw-list-item"><a href="/wiki/Viquip%C3%A8dia:Ajuda" title="El lloc per a saber més coses"><span>Ajuda</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Portada" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Viquipèdia" src="/static/images/mobile/copyright/wikipedia-wordmark-ca.svg" style="width: 7.5em; height: 1.4375em;"> <img class="mw-logo-tagline" alt="l'Enciclopèdia Lliure" src="/static/images/mobile/copyright/wikipedia-tagline-ca.svg" width="120" height="14" style="width: 7.5em; height: 0.875em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Especial:Cerca" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Cerca a la Viquipèdia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Cerca</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Cerca a Viquipèdia" aria-label="Cerca a Viquipèdia" autocapitalize="sentences" title="Cerca a la Viquipèdia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Especial:Cerca"> </div> <button class="cdx-button cdx-search-input__end-button">Cerca</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Eines personals"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Aparença"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Aparença" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Aparença</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_ca.wikipedia.org&uselang=ca" class=""><span>Donatius</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Especial:Crea_compte&returnto=Heli" title="Us animem a crear un compte i iniciar una sessió, encara que no és obligatori" class=""><span>Crea un compte</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Especial:Registre_i_entrada&returnto=Heli" title="Us animem a registrar-vos, però no és obligatori [o]" accesskey="o" class=""><span>Inicia la sessió</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Més opcions" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Eines personals" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Eines personals</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Menú d'usuari" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="//donate.wikimedia.org/wiki/Special:FundraiserRedirector?utm_source=donate&utm_medium=sidebar&utm_campaign=C13_ca.wikipedia.org&uselang=ca"><span>Donatius</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Especial:Crea_compte&returnto=Heli" title="Us animem a crear un compte i iniciar una sessió, encara que no és obligatori"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Crea un compte</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Especial:Registre_i_entrada&returnto=Heli" title="Us animem a registrar-vos, però no és obligatori [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Inicia la sessió</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pàgines per a editors no registrats <a href="/wiki/Ajuda:Introducci%C3%B3" aria-label="Vegeu més informació sobre l'edició"><span>més informació</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Especial:Contribucions_pr%C3%B2pies" title="Una llista de les modificacions fetes des d'aquesta adreça IP [y]" accesskey="y"><span>Contribucions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Especial:Discussi%C3%B3_personal" title="Discussió sobre les edicions per aquesta adreça ip. [n]" accesskey="n"><span>Discussió per aquest IP</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Lloc"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contingut" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contingut</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">amaga</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inici</div> </a> </li> <li id="toc-Història" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Història"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Història</span> </div> </a> <ul id="toc-Història-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Abundància_i_obtenció" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Abundància_i_obtenció"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Abundància i obtenció</span> </div> </a> <button aria-controls="toc-Abundància_i_obtenció-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Commuta la subsecció Abundància i obtenció</span> </button> <ul id="toc-Abundància_i_obtenció-sublist" class="vector-toc-list"> <li id="toc-Extracció_i_ús" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Extracció_i_ús"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Extracció i ús</span> </div> </a> <ul id="toc-Extracció_i_ús-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Característiques_principals" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Característiques_principals"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Característiques principals</span> </div> </a> <button aria-controls="toc-Característiques_principals-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Commuta la subsecció Característiques principals</span> </button> <ul id="toc-Característiques_principals-sublist" class="vector-toc-list"> <li id="toc-Propietats_físiques" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Propietats_físiques"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Propietats físiques</span> </div> </a> <ul id="toc-Propietats_físiques-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Propietats_químiques" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Propietats_químiques"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Propietats químiques</span> </div> </a> <ul id="toc-Propietats_químiques-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Isòtops" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Isòtops"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Isòtops</span> </div> </a> <ul id="toc-Isòtops-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Aplicacions" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Aplicacions"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Aplicacions</span> </div> </a> <ul id="toc-Aplicacions-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Precaucions" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Precaucions"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Precaucions</span> </div> </a> <ul id="toc-Precaucions-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Referències" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referències"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Referències</span> </div> </a> <ul id="toc-Referències-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bibliografia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bibliografia"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Bibliografia</span> </div> </a> <ul id="toc-Bibliografia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Vegeu_també" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Vegeu_també"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Vegeu també</span> </div> </a> <ul id="toc-Vegeu_també-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Enllaços_externs" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Enllaços_externs"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>Enllaços externs</span> </div> </a> <ul id="toc-Enllaços_externs-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contingut" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Commuta la taula de continguts." > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Commuta la taula de continguts.</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Heli</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="Vés a un article en una altra llengua. Disponible en 193 llengües" > <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-193" 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">193 llengües</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Helium" title="Helium - afrikaans" lang="af" hreflang="af" data-title="Helium" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-am mw-list-item"><a href="https://am.wikipedia.org/wiki/%E1%88%92%E1%88%8A%E1%8B%A8%E1%88%9D" title="ሒሊየም - amhàric" lang="am" hreflang="am" data-title="ሒሊየም" data-language-autonym="አማርኛ" data-language-local-name="amhàric" class="interlanguage-link-target"><span>አማርኛ</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Helio" title="Helio - aragonès" lang="an" hreflang="an" data-title="Helio" data-language-autonym="Aragonés" data-language-local-name="aragonès" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-anp mw-list-item"><a href="https://anp.wikipedia.org/wiki/%E0%A4%B9%E0%A5%80%E0%A4%B2%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="हीलियम - angika" lang="anp" hreflang="anp" data-title="हीलियम" data-language-autonym="अंगिका" data-language-local-name="angika" class="interlanguage-link-target"><span>अंगिका</span></a></li><li class="interlanguage-link interwiki-ar badge-Q17437798 badge-goodarticle mw-list-item" title="article bo"><a href="https://ar.wikipedia.org/wiki/%D9%87%D9%8A%D9%84%D9%8A%D9%88%D9%85" title="هيليوم - àrab" lang="ar" hreflang="ar" data-title="هيليوم" data-language-autonym="العربية" data-language-local-name="àrab" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ary mw-list-item"><a href="https://ary.wikipedia.org/wiki/%D9%87%D9%8A%D9%84%D9%8A%D9%88%D9%85" title="هيليوم - Moroccan Arabic" lang="ary" hreflang="ary" data-title="هيليوم" data-language-autonym="الدارجة" data-language-local-name="Moroccan Arabic" class="interlanguage-link-target"><span>الدارجة</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D9%87%D9%8A%D9%84%D9%8A%D9%88%D9%85" title="هيليوم - àrab egipci" lang="arz" hreflang="arz" data-title="هيليوم" data-language-autonym="مصرى" data-language-local-name="àrab egipci" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-as mw-list-item"><a href="https://as.wikipedia.org/wiki/%E0%A6%B9%E0%A6%BF%E0%A6%B2%E0%A6%BF%E0%A6%AF%E0%A6%BC%E0%A6%BE%E0%A6%AE" title="হিলিয়াম - assamès" lang="as" hreflang="as" data-title="হিলিয়াম" data-language-autonym="অসমীয়া" data-language-local-name="assamès" class="interlanguage-link-target"><span>অসমীয়া</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Heliu" title="Heliu - asturià" lang="ast" hreflang="ast" data-title="Heliu" data-language-autonym="Asturianu" data-language-local-name="asturià" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-awa mw-list-item"><a href="https://awa.wikipedia.org/wiki/%E0%A4%B9%E0%A5%87%E0%A4%B2%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="हेलियम - awadhi" lang="awa" hreflang="awa" data-title="हेलियम" data-language-autonym="अवधी" data-language-local-name="awadhi" class="interlanguage-link-target"><span>अवधी</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Helium" title="Helium - azerbaidjanès" lang="az" hreflang="az" data-title="Helium" data-language-autonym="Azərbaycanca" data-language-local-name="azerbaidjanès" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D9%87%D9%84%DB%8C%D9%88%D9%85" title="هلیوم - South Azerbaijani" lang="azb" hreflang="azb" data-title="هلیوم" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - baixkir" lang="ba" hreflang="ba" data-title="Гелий" data-language-autonym="Башҡортса" data-language-local-name="baixkir" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-ban mw-list-item"><a href="https://ban.wikipedia.org/wiki/H%C3%A9lium" title="Hélium - balinès" lang="ban" hreflang="ban" data-title="Hélium" data-language-autonym="Basa Bali" data-language-local-name="balinès" class="interlanguage-link-target"><span>Basa Bali</span></a></li><li class="interlanguage-link interwiki-bat-smg mw-list-item"><a href="https://bat-smg.wikipedia.org/wiki/Helis" title="Helis - Samogitian" lang="sgs" hreflang="sgs" data-title="Helis" data-language-autonym="Žemaitėška" data-language-local-name="Samogitian" class="interlanguage-link-target"><span>Žemaitėška</span></a></li><li class="interlanguage-link interwiki-bcl mw-list-item"><a href="https://bcl.wikipedia.org/wiki/Elyo" title="Elyo - Central Bikol" lang="bcl" hreflang="bcl" data-title="Elyo" data-language-autonym="Bikol Central" data-language-local-name="Central Bikol" class="interlanguage-link-target"><span>Bikol Central</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D1%96%D0%B9" title="Гелій - belarús" lang="be" hreflang="be" data-title="Гелій" data-language-autonym="Беларуская" data-language-local-name="belarús" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D1%8C" title="Гель - Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Гель" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A5%D0%B5%D0%BB%D0%B8%D0%B9" title="Хелий - búlgar" lang="bg" hreflang="bg" data-title="Хелий" data-language-autonym="Български" data-language-local-name="búlgar" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bh mw-list-item"><a href="https://bh.wikipedia.org/wiki/%E0%A4%B9%E0%A5%80%E0%A4%B2%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="हीलियम - Bhojpuri" lang="bh" hreflang="bh" data-title="हीलियम" data-language-autonym="भोजपुरी" data-language-local-name="Bhojpuri" class="interlanguage-link-target"><span>भोजपुरी</span></a></li><li class="interlanguage-link interwiki-blk mw-list-item"><a href="https://blk.wikipedia.org/wiki/%E1%80%9F%E1%80%AE%E1%80%9C%E1%80%AE%E1%80%9A%E1%80%99%E1%80%BA" title="ဟီလီယမ် - Pa'O" lang="blk" hreflang="blk" data-title="ဟီလီယမ်" data-language-autonym="ပအိုဝ်ႏဘာႏသာႏ" data-language-local-name="Pa'O" class="interlanguage-link-target"><span>ပအိုဝ်ႏဘာႏသာႏ</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%B9%E0%A6%BF%E0%A6%B2%E0%A6%BF%E0%A6%AF%E0%A6%BC%E0%A6%BE%E0%A6%AE" title="হিলিয়াম - bengalí" lang="bn" hreflang="bn" data-title="হিলিয়াম" data-language-autonym="বাংলা" data-language-local-name="bengalí" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bo mw-list-item"><a href="https://bo.wikipedia.org/wiki/%E0%BD%A7%E0%BD%BA%E0%BC%8B%E0%BD%A2%E0%BE%B3%E0%BD%B4%E0%BD%84%E0%BC%8B%E0%BC%8D" title="ཧེ་རླུང་། - tibetà" lang="bo" hreflang="bo" data-title="ཧེ་རླུང་།" data-language-autonym="བོད་ཡིག" data-language-local-name="tibetà" class="interlanguage-link-target"><span>བོད་ཡིག</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Heliom" title="Heliom - bretó" lang="br" hreflang="br" data-title="Heliom" data-language-autonym="Brezhoneg" data-language-local-name="bretó" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Helij" title="Helij - bosnià" lang="bs" hreflang="bs" data-title="Helij" data-language-autonym="Bosanski" data-language-local-name="bosnià" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-bxr mw-list-item"><a href="https://bxr.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8" title="Гели - Russia Buriat" lang="bxr" hreflang="bxr" data-title="Гели" data-language-autonym="Буряад" data-language-local-name="Russia Buriat" class="interlanguage-link-target"><span>Буряад</span></a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/H%C3%A2i" title="Hâi - Mindong" lang="cdo" hreflang="cdo" data-title="Hâi" data-language-autonym="閩東語 / Mìng-dĕ̤ng-ngṳ̄" data-language-local-name="Mindong" class="interlanguage-link-target"><span>閩東語 / Mìng-dĕ̤ng-ngṳ̄</span></a></li><li class="interlanguage-link interwiki-ceb mw-list-item"><a href="https://ceb.wikipedia.org/wiki/Helyo" title="Helyo - cebuà" lang="ceb" hreflang="ceb" data-title="Helyo" data-language-autonym="Cebuano" data-language-local-name="cebuà" class="interlanguage-link-target"><span>Cebuano</span></a></li><li class="interlanguage-link interwiki-chr mw-list-item"><a href="https://chr.wikipedia.org/wiki/%E1%8E%A6%E1%8F%8C%E1%8E%A7%E1%8E%AF%E1%8E%A8_%E1%8E%A4%E1%8F%83%E1%8E%B4" title="ᎦᏌᎧᎯᎨ ᎤᏃᎴ - cherokee" lang="chr" hreflang="chr" data-title="ᎦᏌᎧᎯᎨ ᎤᏃᎴ" data-language-autonym="ᏣᎳᎩ" data-language-local-name="cherokee" class="interlanguage-link-target"><span>ᏣᎳᎩ</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%DA%BE%DB%8C%D9%84%DB%8C%DB%86%D9%85" title="ھیلیۆم - kurd central" lang="ckb" hreflang="ckb" data-title="ھیلیۆم" data-language-autonym="کوردی" data-language-local-name="kurd central" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-co mw-list-item"><a href="https://co.wikipedia.org/wiki/Eliu" title="Eliu - cors" lang="co" hreflang="co" data-title="Eliu" data-language-autonym="Corsu" data-language-local-name="cors" class="interlanguage-link-target"><span>Corsu</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Helium" title="Helium - txec" lang="cs" hreflang="cs" data-title="Helium" data-language-autonym="Čeština" data-language-local-name="txec" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cu mw-list-item"><a href="https://cu.wikipedia.org/wiki/%D0%98%D0%BB%D1%97%D1%A5" title="Илїѥ - eslau eclesiàstic" lang="cu" hreflang="cu" data-title="Илїѥ" data-language-autonym="Словѣньскъ / ⰔⰎⰑⰂⰡⰐⰠⰔⰍⰟ" data-language-local-name="eslau eclesiàstic" class="interlanguage-link-target"><span>Словѣньскъ / ⰔⰎⰑⰂⰡⰐⰠⰔⰍⰟ</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - txuvaix" lang="cv" hreflang="cv" data-title="Гелий" data-language-autonym="Чӑвашла" data-language-local-name="txuvaix" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Heliwm" title="Heliwm - gal·lès" lang="cy" hreflang="cy" data-title="Heliwm" data-language-autonym="Cymraeg" data-language-local-name="gal·lès" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da badge-Q17559452 badge-recommendedarticle mw-list-item" title="article recomanat"><a href="https://da.wikipedia.org/wiki/Helium" title="Helium - danès" lang="da" hreflang="da" data-title="Helium" data-language-autonym="Dansk" data-language-local-name="danès" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de badge-Q17437796 badge-featuredarticle mw-list-item" title="article de qualitat"><a href="https://de.wikipedia.org/wiki/Helium" title="Helium - alemany" lang="de" hreflang="de" data-title="Helium" data-language-autonym="Deutsch" data-language-local-name="alemany" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-diq mw-list-item"><a href="https://diq.wikipedia.org/wiki/Helyum" title="Helyum - Zazaki" lang="diq" hreflang="diq" data-title="Helyum" data-language-autonym="Zazaki" data-language-local-name="Zazaki" class="interlanguage-link-target"><span>Zazaki</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%89%CE%BB%CE%B9%CE%BF" title="Ήλιο - grec" lang="el" hreflang="el" data-title="Ήλιο" data-language-autonym="Ελληνικά" data-language-local-name="grec" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-eml mw-list-item"><a href="https://eml.wikipedia.org/wiki/%C3%8Ali" title="Êli - Emiliano-Romagnolo" lang="egl" hreflang="egl" data-title="Êli" data-language-autonym="Emiliàn e rumagnòl" data-language-local-name="Emiliano-Romagnolo" class="interlanguage-link-target"><span>Emiliàn e rumagnòl</span></a></li><li class="interlanguage-link interwiki-en badge-Q17437796 badge-featuredarticle mw-list-item" title="article de qualitat"><a href="https://en.wikipedia.org/wiki/Helium" title="Helium - anglès" lang="en" hreflang="en" data-title="Helium" data-language-autonym="English" data-language-local-name="anglès" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Heliumo" title="Heliumo - esperanto" lang="eo" hreflang="eo" data-title="Heliumo" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es badge-Q17437796 badge-featuredarticle mw-list-item" title="article de qualitat"><a href="https://es.wikipedia.org/wiki/Helio" title="Helio - espanyol" lang="es" hreflang="es" data-title="Helio" data-language-autonym="Español" data-language-local-name="espanyol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Heelium" title="Heelium - estonià" lang="et" hreflang="et" data-title="Heelium" data-language-autonym="Eesti" data-language-local-name="estonià" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu badge-Q17437796 badge-featuredarticle mw-list-item" title="article de qualitat"><a href="https://eu.wikipedia.org/wiki/Helio" title="Helio - basc" lang="eu" hreflang="eu" data-title="Helio" data-language-autonym="Euskara" data-language-local-name="basc" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa badge-Q17437796 badge-featuredarticle mw-list-item" title="article de qualitat"><a href="https://fa.wikipedia.org/wiki/%D9%87%D9%84%DB%8C%D9%88%D9%85" title="هلیوم - persa" lang="fa" hreflang="fa" data-title="هلیوم" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi badge-Q17559452 badge-recommendedarticle mw-list-item" title="article recomanat"><a href="https://fi.wikipedia.org/wiki/Helium" title="Helium - finès" lang="fi" hreflang="fi" data-title="Helium" data-language-autonym="Suomi" data-language-local-name="finès" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fo mw-list-item"><a href="https://fo.wikipedia.org/wiki/Helium" title="Helium - feroès" lang="fo" hreflang="fo" data-title="Helium" data-language-autonym="Føroyskt" data-language-local-name="feroès" class="interlanguage-link-target"><span>Føroyskt</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/H%C3%A9lium" title="Hélium - francès" lang="fr" hreflang="fr" data-title="Hélium" data-language-autonym="Français" data-language-local-name="francès" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Heelium" title="Heelium - frisó septentrional" lang="frr" hreflang="frr" data-title="Heelium" data-language-autonym="Nordfriisk" data-language-local-name="frisó septentrional" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-fur mw-list-item"><a href="https://fur.wikipedia.org/wiki/Eli" title="Eli - friülà" lang="fur" hreflang="fur" data-title="Eli" data-language-autonym="Furlan" data-language-local-name="friülà" class="interlanguage-link-target"><span>Furlan</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/Helium" title="Helium - frisó occidental" lang="fy" hreflang="fy" data-title="Helium" data-language-autonym="Frysk" data-language-local-name="frisó occidental" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/H%C3%A9iliam" title="Héiliam - irlandès" lang="ga" hreflang="ga" data-title="Héiliam" data-language-autonym="Gaeilge" data-language-local-name="irlandès" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gan mw-list-item"><a href="https://gan.wikipedia.org/wiki/%E6%B0%A6" title="氦 - xinès gan" lang="gan" hreflang="gan" data-title="氦" data-language-autonym="贛語" data-language-local-name="xinès gan" class="interlanguage-link-target"><span>贛語</span></a></li><li class="interlanguage-link interwiki-gd mw-list-item"><a href="https://gd.wikipedia.org/wiki/Helium" title="Helium - gaèlic escocès" lang="gd" hreflang="gd" data-title="Helium" data-language-autonym="Gàidhlig" data-language-local-name="gaèlic escocès" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Helio" title="Helio - gallec" lang="gl" hreflang="gl" data-title="Helio" data-language-autonym="Galego" data-language-local-name="gallec" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-gn mw-list-item"><a href="https://gn.wikipedia.org/wiki/Tataveve" title="Tataveve - guaraní" lang="gn" hreflang="gn" data-title="Tataveve" data-language-autonym="Avañe'ẽ" data-language-local-name="guaraní" class="interlanguage-link-target"><span>Avañe'ẽ</span></a></li><li class="interlanguage-link interwiki-gu mw-list-item"><a href="https://gu.wikipedia.org/wiki/%E0%AA%B9%E0%AB%80%E0%AA%B2%E0%AA%BF%E0%AA%AF%E0%AA%AE" title="હીલિયમ - gujarati" lang="gu" hreflang="gu" data-title="હીલિયમ" data-language-autonym="ગુજરાતી" data-language-local-name="gujarati" class="interlanguage-link-target"><span>ગુજરાતી</span></a></li><li class="interlanguage-link interwiki-gv mw-list-item"><a href="https://gv.wikipedia.org/wiki/Hailium" title="Hailium - manx" lang="gv" hreflang="gv" data-title="Hailium" data-language-autonym="Gaelg" data-language-local-name="manx" class="interlanguage-link-target"><span>Gaelg</span></a></li><li class="interlanguage-link interwiki-hak mw-list-item"><a href="https://hak.wikipedia.org/wiki/Hoi" title="Hoi - xinès hakka" lang="hak" hreflang="hak" data-title="Hoi" data-language-autonym="客家語 / Hak-kâ-ngî" data-language-local-name="xinès hakka" class="interlanguage-link-target"><span>客家語 / Hak-kâ-ngî</span></a></li><li class="interlanguage-link interwiki-haw mw-list-item"><a href="https://haw.wikipedia.org/wiki/Hiliuma" title="Hiliuma - hawaià" lang="haw" hreflang="haw" data-title="Hiliuma" data-language-autonym="Hawaiʻi" data-language-local-name="hawaià" class="interlanguage-link-target"><span>Hawaiʻi</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%94%D7%9C%D7%99%D7%95%D7%9D" title="הליום - hebreu" lang="he" hreflang="he" data-title="הליום" data-language-autonym="עברית" data-language-local-name="hebreu" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B9%E0%A4%BF%E0%A4%B2%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="हिलियम - hindi" lang="hi" hreflang="hi" data-title="हिलियम" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hif mw-list-item"><a href="https://hif.wikipedia.org/wiki/Helium" title="Helium - hindi de Fiji" lang="hif" hreflang="hif" data-title="Helium" data-language-autonym="Fiji Hindi" data-language-local-name="hindi de Fiji" class="interlanguage-link-target"><span>Fiji Hindi</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Helij" title="Helij - croat" lang="hr" hreflang="hr" data-title="Helij" data-language-autonym="Hrvatski" data-language-local-name="croat" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hsb mw-list-item"><a href="https://hsb.wikipedia.org/wiki/Helium" title="Helium - alt sòrab" lang="hsb" hreflang="hsb" data-title="Helium" data-language-autonym="Hornjoserbsce" data-language-local-name="alt sòrab" class="interlanguage-link-target"><span>Hornjoserbsce</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Ely%C3%B2m" title="Elyòm - crioll d’Haití" lang="ht" hreflang="ht" data-title="Elyòm" data-language-autonym="Kreyòl ayisyen" data-language-local-name="crioll d’Haití" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/H%C3%A9lium" title="Hélium - hongarès" lang="hu" hreflang="hu" data-title="Hélium" data-language-autonym="Magyar" data-language-local-name="hongarès" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%80%D5%A5%D5%AC%D5%AB%D5%B8%D6%82%D5%B4" title="Հելիում - armeni" lang="hy" hreflang="hy" data-title="Հելիում" data-language-autonym="Հայերեն" data-language-local-name="armeni" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-ia mw-list-item"><a href="https://ia.wikipedia.org/wiki/Helium" title="Helium - interlingua" lang="ia" hreflang="ia" data-title="Helium" data-language-autonym="Interlingua" data-language-local-name="interlingua" class="interlanguage-link-target"><span>Interlingua</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Helium" title="Helium - indonesi" lang="id" hreflang="id" data-title="Helium" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesi" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ie mw-list-item"><a href="https://ie.wikipedia.org/wiki/Helium" title="Helium - interlingue" lang="ie" hreflang="ie" data-title="Helium" data-language-autonym="Interlingue" data-language-local-name="interlingue" class="interlanguage-link-target"><span>Interlingue</span></a></li><li class="interlanguage-link interwiki-ilo mw-list-item"><a href="https://ilo.wikipedia.org/wiki/Helio" title="Helio - ilocano" lang="ilo" hreflang="ilo" data-title="Helio" data-language-autonym="Ilokano" data-language-local-name="ilocano" class="interlanguage-link-target"><span>Ilokano</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Helio" title="Helio - ido" lang="io" hreflang="io" data-title="Helio" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Hel%C3%ADn" title="Helín - islandès" lang="is" hreflang="is" data-title="Helín" data-language-autonym="Íslenska" data-language-local-name="islandès" 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/Elio" title="Elio - italià" lang="it" hreflang="it" data-title="Elio" data-language-autonym="Italiano" data-language-local-name="italià" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%98%E3%83%AA%E3%82%A6%E3%83%A0" title="ヘリウム - japonès" lang="ja" hreflang="ja" data-title="ヘリウム" data-language-autonym="日本語" data-language-local-name="japonès" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-jam mw-list-item"><a href="https://jam.wikipedia.org/wiki/Iiliom" title="Iiliom - crioll anglès de Jamaica" lang="jam" hreflang="jam" data-title="Iiliom" data-language-autonym="Patois" data-language-local-name="crioll anglès de Jamaica" class="interlanguage-link-target"><span>Patois</span></a></li><li class="interlanguage-link interwiki-jbo mw-list-item"><a href="https://jbo.wikipedia.org/wiki/solnavni" title="solnavni - lojban" lang="jbo" hreflang="jbo" data-title="solnavni" data-language-autonym="La .lojban." data-language-local-name="lojban" class="interlanguage-link-target"><span>La .lojban.</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/H%C3%A8liyum" title="Hèliyum - javanès" lang="jv" hreflang="jv" data-title="Hèliyum" data-language-autonym="Jawa" data-language-local-name="javanès" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%B0%E1%83%94%E1%83%9A%E1%83%98%E1%83%A3%E1%83%9B%E1%83%98" title="ჰელიუმი - georgià" lang="ka" hreflang="ka" data-title="ჰელიუმი" data-language-autonym="ქართული" data-language-local-name="georgià" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-kbp mw-list-item"><a href="https://kbp.wikipedia.org/wiki/Heelim" title="Heelim - Kabiye" lang="kbp" hreflang="kbp" data-title="Heelim" data-language-autonym="Kabɩyɛ" data-language-local-name="Kabiye" class="interlanguage-link-target"><span>Kabɩyɛ</span></a></li><li class="interlanguage-link interwiki-ki mw-list-item"><a href="https://ki.wikipedia.org/wiki/Helium" title="Helium - kikuiu" lang="ki" hreflang="ki" data-title="Helium" data-language-autonym="Gĩkũyũ" data-language-local-name="kikuiu" class="interlanguage-link-target"><span>Gĩkũyũ</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - kazakh" lang="kk" hreflang="kk" data-title="Гелий" data-language-autonym="Қазақша" data-language-local-name="kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-km mw-list-item"><a href="https://km.wikipedia.org/wiki/%E1%9E%A2%E1%9F%81%E1%9E%9B%E1%9F%92%E1%9E%99%E1%9E%BC%E1%9E%98" title="អេល្យូម - khmer" lang="km" hreflang="km" data-title="អេល្យូម" data-language-autonym="ភាសាខ្មែរ" data-language-local-name="khmer" class="interlanguage-link-target"><span>ភាសាខ្មែរ</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%B9%E0%B3%80%E0%B2%B2%E0%B2%BF%E0%B2%AF%E0%B2%AE%E0%B3%8D" title="ಹೀಲಿಯಮ್ - kannada" lang="kn" hreflang="kn" data-title="ಹೀಲಿಯಮ್" data-language-autonym="ಕನ್ನಡ" data-language-local-name="kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%97%AC%EB%A5%A8" title="헬륨 - coreà" lang="ko" hreflang="ko" data-title="헬륨" data-language-autonym="한국어" data-language-local-name="coreà" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-koi mw-list-item"><a href="https://koi.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - komi-permiac" lang="koi" hreflang="koi" data-title="Гелий" data-language-autonym="Перем коми" data-language-local-name="komi-permiac" class="interlanguage-link-target"><span>Перем коми</span></a></li><li class="interlanguage-link interwiki-ksh mw-list-item"><a href="https://ksh.wikipedia.org/wiki/Helium" title="Helium - kölsch" lang="ksh" hreflang="ksh" data-title="Helium" data-language-autonym="Ripoarisch" data-language-local-name="kölsch" class="interlanguage-link-target"><span>Ripoarisch</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Hely%C3%BBm" title="Helyûm - kurd" lang="ku" hreflang="ku" data-title="Helyûm" data-language-autonym="Kurdî" data-language-local-name="kurd" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-kv mw-list-item"><a href="https://kv.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - komi" lang="kv" hreflang="kv" data-title="Гелий" data-language-autonym="Коми" data-language-local-name="komi" class="interlanguage-link-target"><span>Коми</span></a></li><li class="interlanguage-link interwiki-kw mw-list-item"><a href="https://kw.wikipedia.org/wiki/Heliom" title="Heliom - còrnic" lang="kw" hreflang="kw" data-title="Heliom" data-language-autonym="Kernowek" data-language-local-name="còrnic" class="interlanguage-link-target"><span>Kernowek</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - kirguís" lang="ky" hreflang="ky" data-title="Гелий" data-language-autonym="Кыргызча" data-language-local-name="kirguís" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Helium" title="Helium - llatí" lang="la" hreflang="la" data-title="Helium" data-language-autonym="Latina" data-language-local-name="llatí" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Helium" title="Helium - luxemburguès" lang="lb" hreflang="lb" data-title="Helium" data-language-autonym="Lëtzebuergesch" data-language-local-name="luxemburguès" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lfn mw-list-item"><a href="https://lfn.wikipedia.org/wiki/Elio" title="Elio - Lingua Franca Nova" lang="lfn" hreflang="lfn" data-title="Elio" data-language-autonym="Lingua Franca Nova" data-language-local-name="Lingua Franca Nova" class="interlanguage-link-target"><span>Lingua Franca Nova</span></a></li><li class="interlanguage-link interwiki-lg mw-list-item"><a href="https://lg.wikipedia.org/wiki/Keriyaamu_(Herium)" title="Keriyaamu (Herium) - ganda" lang="lg" hreflang="lg" data-title="Keriyaamu (Herium)" data-language-autonym="Luganda" data-language-local-name="ganda" class="interlanguage-link-target"><span>Luganda</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/Helium" title="Helium - limburguès" lang="li" hreflang="li" data-title="Helium" data-language-autonym="Limburgs" data-language-local-name="limburguès" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-lij mw-list-item"><a href="https://lij.wikipedia.org/wiki/Elio" title="Elio - lígur" lang="lij" hreflang="lij" data-title="Elio" data-language-autonym="Ligure" data-language-local-name="lígur" class="interlanguage-link-target"><span>Ligure</span></a></li><li class="interlanguage-link interwiki-lld mw-list-item"><a href="https://lld.wikipedia.org/wiki/Elie" title="Elie - Ladin" lang="lld" hreflang="lld" data-title="Elie" data-language-autonym="Ladin" data-language-local-name="Ladin" class="interlanguage-link-target"><span>Ladin</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Elio_(element_chimich)" title="Elio (element chimich) - llombard" lang="lmo" hreflang="lmo" data-title="Elio (element chimich)" data-language-autonym="Lombard" data-language-local-name="llombard" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-ln mw-list-item"><a href="https://ln.wikipedia.org/wiki/Eliy%C3%BAmu" title="Eliyúmu - lingala" lang="ln" hreflang="ln" data-title="Eliyúmu" data-language-autonym="Lingála" data-language-local-name="lingala" class="interlanguage-link-target"><span>Lingála</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Helis" title="Helis - lituà" lang="lt" hreflang="lt" data-title="Helis" data-language-autonym="Lietuvių" data-language-local-name="lituà" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/H%C4%93lijs" title="Hēlijs - letó" lang="lv" hreflang="lv" data-title="Hēlijs" data-language-autonym="Latviešu" data-language-local-name="letó" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mi mw-list-item"><a href="https://mi.wikipedia.org/wiki/Haum%C4%81m%C4%81" title="Haumāmā - maori" lang="mi" hreflang="mi" data-title="Haumāmā" data-language-autonym="Māori" data-language-local-name="maori" class="interlanguage-link-target"><span>Māori</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A5%D0%B5%D0%BB%D0%B8%D1%83%D0%BC" title="Хелиум - macedoni" lang="mk" hreflang="mk" data-title="Хелиум" data-language-autonym="Македонски" data-language-local-name="macedoni" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%B9%E0%B5%80%E0%B4%B2%E0%B4%BF%E0%B4%AF%E0%B4%82" title="ഹീലിയം - malaiàlam" lang="ml" hreflang="ml" data-title="ഹീലിയം" data-language-autonym="മലയാളം" data-language-local-name="malaiàlam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8" title="Гели - mongol" lang="mn" hreflang="mn" data-title="Гели" data-language-autonym="Монгол" data-language-local-name="mongol" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-mni mw-list-item"><a href="https://mni.wikipedia.org/wiki/%EA%AF%8D%EA%AF%A4%EA%AF%82%EA%AF%A4%EA%AF%8C%EA%AF%9D" title="ꯍꯤꯂꯤꯌꯝ - manipurí" lang="mni" hreflang="mni" data-title="ꯍꯤꯂꯤꯌꯝ" data-language-autonym="ꯃꯤꯇꯩ ꯂꯣꯟ" data-language-local-name="manipurí" class="interlanguage-link-target"><span>ꯃꯤꯇꯩ ꯂꯣꯟ</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%B9%E0%A5%87%E0%A4%B2%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="हेलियम - marathi" lang="mr" hreflang="mr" data-title="हेलियम" data-language-autonym="मराठी" data-language-local-name="marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-mrj mw-list-item"><a href="https://mrj.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - mari occidental" lang="mrj" hreflang="mrj" data-title="Гелий" data-language-autonym="Кырык мары" data-language-local-name="mari occidental" class="interlanguage-link-target"><span>Кырык мары</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Helium" title="Helium - malai" lang="ms" hreflang="ms" data-title="Helium" data-language-autonym="Bahasa Melayu" data-language-local-name="malai" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-mt mw-list-item"><a href="https://mt.wikipedia.org/wiki/Elju" title="Elju - maltès" lang="mt" hreflang="mt" data-title="Elju" data-language-autonym="Malti" data-language-local-name="maltès" class="interlanguage-link-target"><span>Malti</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%9F%E1%80%AE%E1%80%9C%E1%80%AE%E1%80%9A%E1%80%99%E1%80%BA" title="ဟီလီယမ် - birmà" lang="my" hreflang="my" data-title="ဟီလီယမ်" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="birmà" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-myv mw-list-item"><a href="https://myv.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - mordovià erza" lang="myv" hreflang="myv" data-title="Гелий" data-language-autonym="Эрзянь" data-language-local-name="mordovià erza" class="interlanguage-link-target"><span>Эрзянь</span></a></li><li class="interlanguage-link interwiki-nah mw-list-item"><a href="https://nah.wikipedia.org/wiki/Tonatiuhyoh" title="Tonatiuhyoh - Nahuatl" lang="nah" hreflang="nah" data-title="Tonatiuhyoh" data-language-autonym="Nāhuatl" data-language-local-name="Nahuatl" class="interlanguage-link-target"><span>Nāhuatl</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Helium" title="Helium - baix alemany" lang="nds" hreflang="nds" data-title="Helium" data-language-autonym="Plattdüütsch" data-language-local-name="baix alemany" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%B9%E0%A4%BF%E0%A4%B2%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="हिलियम - nepalès" lang="ne" hreflang="ne" data-title="हिलियम" data-language-autonym="नेपाली" data-language-local-name="nepalès" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-new mw-list-item"><a href="https://new.wikipedia.org/wiki/%E0%A4%B9%E0%A4%BF%E0%A4%B2%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="हिलियम - newari" lang="new" hreflang="new" data-title="हिलियम" data-language-autonym="नेपाल भाषा" data-language-local-name="newari" class="interlanguage-link-target"><span>नेपाल भाषा</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Helium" title="Helium - neerlandès" lang="nl" hreflang="nl" data-title="Helium" data-language-autonym="Nederlands" data-language-local-name="neerlandès" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Helium" title="Helium - noruec nynorsk" lang="nn" hreflang="nn" data-title="Helium" data-language-autonym="Norsk nynorsk" data-language-local-name="noruec nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Helium" title="Helium - noruec bokmål" lang="nb" hreflang="nb" data-title="Helium" data-language-autonym="Norsk bokmål" data-language-local-name="noruec bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nov mw-list-item"><a href="https://nov.wikipedia.org/wiki/Helium" title="Helium - novial" lang="nov" hreflang="nov" data-title="Helium" data-language-autonym="Novial" data-language-local-name="novial" class="interlanguage-link-target"><span>Novial</span></a></li><li class="interlanguage-link interwiki-nv mw-list-item"><a href="https://nv.wikipedia.org/wiki/N%C3%AD%C5%82ch%CA%BCi_%C3%A1sz%C3%B3l%C3%AD" title="Níłchʼi ászólí - navaho" lang="nv" hreflang="nv" data-title="Níłchʼi ászólí" data-language-autonym="Diné bizaad" data-language-local-name="navaho" class="interlanguage-link-target"><span>Diné bizaad</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/%C3%88li" title="Èli - occità" lang="oc" hreflang="oc" data-title="Èli" data-language-autonym="Occitan" data-language-local-name="occità" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-olo mw-list-item"><a href="https://olo.wikipedia.org/wiki/Helium" title="Helium - Livvi-Karelian" lang="olo" hreflang="olo" data-title="Helium" data-language-autonym="Livvinkarjala" data-language-local-name="Livvi-Karelian" class="interlanguage-link-target"><span>Livvinkarjala</span></a></li><li class="interlanguage-link interwiki-om mw-list-item"><a href="https://om.wikipedia.org/wiki/Heeliyeemii" title="Heeliyeemii - oromo" lang="om" hreflang="om" data-title="Heeliyeemii" data-language-autonym="Oromoo" data-language-local-name="oromo" class="interlanguage-link-target"><span>Oromoo</span></a></li><li class="interlanguage-link interwiki-os mw-list-item"><a href="https://os.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - osseta" lang="os" hreflang="os" data-title="Гелий" data-language-autonym="Ирон" data-language-local-name="osseta" class="interlanguage-link-target"><span>Ирон</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%B9%E0%A9%80%E0%A8%B2%E0%A9%80%E0%A8%85%E0%A8%AE" title="ਹੀਲੀਅਮ - panjabi" lang="pa" hreflang="pa" data-title="ਹੀਲੀਅਮ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="panjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pap mw-list-item"><a href="https://pap.wikipedia.org/wiki/Helium" title="Helium - papiament" lang="pap" hreflang="pap" data-title="Helium" data-language-autonym="Papiamentu" data-language-local-name="papiament" class="interlanguage-link-target"><span>Papiamentu</span></a></li><li class="interlanguage-link interwiki-pi mw-list-item"><a href="https://pi.wikipedia.org/wiki/%E0%A4%B9%E0%A5%87%E0%A4%B2%E0%A4%BF%E0%A4%AF%E0%A4%AE" title="हेलियम - pali" lang="pi" hreflang="pi" data-title="हेलियम" data-language-autonym="पालि" data-language-local-name="pali" class="interlanguage-link-target"><span>पालि</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Hel_(pierwiastek)" title="Hel (pierwiastek) - polonès" lang="pl" hreflang="pl" data-title="Hel (pierwiastek)" data-language-autonym="Polski" data-language-local-name="polonès" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pms mw-list-item"><a href="https://pms.wikipedia.org/wiki/Elio" title="Elio - piemontès" lang="pms" hreflang="pms" data-title="Elio" data-language-autonym="Piemontèis" data-language-local-name="piemontès" class="interlanguage-link-target"><span>Piemontèis</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%DB%81%DB%8C%D9%84%DB%8C%D8%A6%D9%85" title="ہیلیئم - Western Punjabi" lang="pnb" hreflang="pnb" data-title="ہیلیئم" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-pnt mw-list-item"><a href="https://pnt.wikipedia.org/wiki/%CE%89%CE%BB%CE%B9%CE%BF%CE%BD" title="Ήλιον - pòntic" lang="pnt" hreflang="pnt" data-title="Ήλιον" data-language-autonym="Ποντιακά" data-language-local-name="pòntic" class="interlanguage-link-target"><span>Ποντιακά</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D9%87%DB%90%D9%84%D9%8A%D9%88%D9%85" title="هېليوم - paixtu" lang="ps" hreflang="ps" data-title="هېليوم" data-language-autonym="پښتو" data-language-local-name="paixtu" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/H%C3%A9lio" title="Hélio - portuguès" lang="pt" hreflang="pt" data-title="Hélio" data-language-autonym="Português" data-language-local-name="portuguès" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/Ilyu" title="Ilyu - quítxua" lang="qu" hreflang="qu" data-title="Ilyu" data-language-autonym="Runa Simi" data-language-local-name="quítxua" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Heliu" title="Heliu - romanès" lang="ro" hreflang="ro" data-title="Heliu" data-language-autonym="Română" data-language-local-name="romanès" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-roa-rup mw-list-item"><a href="https://roa-rup.wikipedia.org/wiki/Helium" title="Helium - aromanès" lang="rup" hreflang="rup" data-title="Helium" data-language-autonym="Armãneashti" data-language-local-name="aromanès" class="interlanguage-link-target"><span>Armãneashti</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - rus" lang="ru" hreflang="ru" data-title="Гелий" data-language-autonym="Русский" data-language-local-name="rus" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-rue mw-list-item"><a href="https://rue.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - Rusyn" lang="rue" hreflang="rue" data-title="Гелий" data-language-autonym="Русиньскый" data-language-local-name="Rusyn" class="interlanguage-link-target"><span>Русиньскый</span></a></li><li class="interlanguage-link interwiki-sa mw-list-item"><a href="https://sa.wikipedia.org/wiki/%E0%A4%B9%E0%A5%80%E0%A4%B2%E0%A4%BF%E0%A4%AF%E0%A4%AE%E0%A5%8D" title="हीलियम् - sànscrit" lang="sa" hreflang="sa" data-title="हीलियम्" data-language-autonym="संस्कृतम्" data-language-local-name="sànscrit" class="interlanguage-link-target"><span>संस्कृतम्</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - iacut" lang="sah" hreflang="sah" data-title="Гелий" data-language-autonym="Саха тыла" data-language-local-name="iacut" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sat mw-list-item"><a href="https://sat.wikipedia.org/wiki/%E1%B1%A6%E1%B1%A4%E1%B1%9E%E1%B1%A4%E1%B1%AD%E1%B1%9F%E1%B1%A2" title="ᱦᱤᱞᱤᱭᱟᱢ - santali" lang="sat" hreflang="sat" data-title="ᱦᱤᱞᱤᱭᱟᱢ" data-language-autonym="ᱥᱟᱱᱛᱟᱲᱤ" data-language-local-name="santali" class="interlanguage-link-target"><span>ᱥᱟᱱᱛᱟᱲᱤ</span></a></li><li class="interlanguage-link interwiki-sc mw-list-item"><a href="https://sc.wikipedia.org/wiki/%C3%88liu" title="Èliu - sard" lang="sc" hreflang="sc" data-title="Èliu" data-language-autonym="Sardu" data-language-local-name="sard" class="interlanguage-link-target"><span>Sardu</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/%C3%88liu" title="Èliu - sicilià" lang="scn" hreflang="scn" data-title="Èliu" data-language-autonym="Sicilianu" data-language-local-name="sicilià" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Helium" title="Helium - escocès" lang="sco" hreflang="sco" data-title="Helium" data-language-autonym="Scots" data-language-local-name="escocès" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sd mw-list-item"><a href="https://sd.wikipedia.org/wiki/%D9%87%D9%8A%D9%84%D9%8A%D8%A6%D9%85" title="هيليئم - sindi" lang="sd" hreflang="sd" data-title="هيليئم" data-language-autonym="سنڌي" data-language-local-name="sindi" class="interlanguage-link-target"><span>سنڌي</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Helij" title="Helij - serbocroat" lang="sh" hreflang="sh" data-title="Helij" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbocroat" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-shi mw-list-item"><a href="https://shi.wikipedia.org/wiki/Ahilyum" title="Ahilyum - taixelhit" lang="shi" hreflang="shi" data-title="Ahilyum" data-language-autonym="Taclḥit" data-language-local-name="taixelhit" class="interlanguage-link-target"><span>Taclḥit</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B7%84%E0%B7%93%E0%B6%BD%E0%B7%92%E0%B6%BA%E0%B6%B8%E0%B7%8A" title="හීලියම් - singalès" lang="si" hreflang="si" data-title="හීලියම්" data-language-autonym="සිංහල" data-language-local-name="singalès" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Helium" title="Helium - Simple English" lang="en-simple" hreflang="en-simple" data-title="Helium" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/H%C3%A9lium" title="Hélium - eslovac" lang="sk" hreflang="sk" data-title="Hélium" data-language-autonym="Slovenčina" data-language-local-name="eslovac" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Helij" title="Helij - eslovè" lang="sl" hreflang="sl" data-title="Helij" data-language-autonym="Slovenščina" data-language-local-name="eslovè" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-smn mw-list-item"><a href="https://smn.wikipedia.org/wiki/Helium" title="Helium - sami d’Inari" lang="smn" hreflang="smn" data-title="Helium" data-language-autonym="Anarâškielâ" data-language-local-name="sami d’Inari" class="interlanguage-link-target"><span>Anarâškielâ</span></a></li><li class="interlanguage-link interwiki-sn mw-list-item"><a href="https://sn.wikipedia.org/wiki/Helium" title="Helium - shona" lang="sn" hreflang="sn" data-title="Helium" data-language-autonym="ChiShona" data-language-local-name="shona" class="interlanguage-link-target"><span>ChiShona</span></a></li><li class="interlanguage-link interwiki-so mw-list-item"><a href="https://so.wikipedia.org/wiki/Hiliyaam" title="Hiliyaam - somali" lang="so" hreflang="so" data-title="Hiliyaam" data-language-autonym="Soomaaliga" data-language-local-name="somali" class="interlanguage-link-target"><span>Soomaaliga</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Heliumi" title="Heliumi - albanès" lang="sq" hreflang="sq" data-title="Heliumi" data-language-autonym="Shqip" data-language-local-name="albanès" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A5%D0%B5%D0%BB%D0%B8%D1%98%D1%83%D0%BC" title="Хелијум - serbi" lang="sr" hreflang="sr" data-title="Хелијум" data-language-autonym="Српски / srpski" data-language-local-name="serbi" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-stq mw-list-item"><a href="https://stq.wikipedia.org/wiki/Helium" title="Helium - Saterland Frisian" lang="stq" hreflang="stq" data-title="Helium" data-language-autonym="Seeltersk" data-language-local-name="Saterland Frisian" class="interlanguage-link-target"><span>Seeltersk</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/H%C3%A9lium" title="Hélium - sondanès" lang="su" hreflang="su" data-title="Hélium" data-language-autonym="Sunda" data-language-local-name="sondanès" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-sv badge-Q17437798 badge-goodarticle mw-list-item" title="article bo"><a href="https://sv.wikipedia.org/wiki/Helium" title="Helium - suec" lang="sv" hreflang="sv" data-title="Helium" data-language-autonym="Svenska" data-language-local-name="suec" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Heli" title="Heli - suahili" lang="sw" hreflang="sw" data-title="Heli" data-language-autonym="Kiswahili" data-language-local-name="suahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%88%E0%AE%B2%E0%AE%BF%E0%AE%AF%E0%AE%AE%E0%AF%8D" title="ஈலியம் - tàmil" lang="ta" hreflang="ta" data-title="ஈலியம்" data-language-autonym="தமிழ்" data-language-local-name="tàmil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%B9%E0%B1%80%E0%B0%B2%E0%B0%BF%E0%B0%AF%E0%B0%82" title="హీలియం - telugu" lang="te" hreflang="te" data-title="హీలియం" data-language-autonym="తెలుగు" data-language-local-name="telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D2%B2%D0%B5%D0%BB%D0%B8%D0%B9" title="Ҳелий - tadjik" lang="tg" hreflang="tg" data-title="Ҳелий" data-language-autonym="Тоҷикӣ" data-language-local-name="tadjik" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%AE%E0%B8%B5%E0%B9%80%E0%B8%A5%E0%B8%B5%E0%B8%A2%E0%B8%A1" title="ฮีเลียม - tai" lang="th" hreflang="th" data-title="ฮีเลียม" data-language-autonym="ไทย" data-language-local-name="tai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Elyo" title="Elyo - tagal" lang="tl" hreflang="tl" data-title="Elyo" data-language-autonym="Tagalog" data-language-local-name="tagal" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Helyum" title="Helyum - turc" lang="tr" hreflang="tr" data-title="Helyum" data-language-autonym="Türkçe" data-language-local-name="turc" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - tàtar" lang="tt" hreflang="tt" data-title="Гелий" data-language-autonym="Татарча / tatarça" data-language-local-name="tàtar" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-tyv mw-list-item"><a href="https://tyv.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%B9" title="Гелий - tuvinià" lang="tyv" hreflang="tyv" data-title="Гелий" data-language-autonym="Тыва дыл" data-language-local-name="tuvinià" class="interlanguage-link-target"><span>Тыва дыл</span></a></li><li class="interlanguage-link interwiki-ug mw-list-item"><a href="https://ug.wikipedia.org/wiki/%DA%AF%DB%90%D9%84%D9%89%D9%8A" title="گېلىي - uigur" lang="ug" hreflang="ug" data-title="گېلىي" data-language-autonym="ئۇيغۇرچە / Uyghurche" data-language-local-name="uigur" class="interlanguage-link-target"><span>ئۇيغۇرچە / Uyghurche</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D1%96%D0%B9" title="Гелій - ucraïnès" lang="uk" hreflang="uk" data-title="Гелій" data-language-autonym="Українська" data-language-local-name="ucraïnès" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%DB%81%DB%8C%D9%84%DB%8C%D9%85" title="ہیلیم - urdú" lang="ur" hreflang="ur" data-title="ہیلیم" data-language-autonym="اردو" data-language-local-name="urdú" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Geliy" title="Geliy - uzbek" lang="uz" hreflang="uz" data-title="Geliy" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vep mw-list-item"><a href="https://vep.wikipedia.org/wiki/Gelii" title="Gelii - vepse" lang="vep" hreflang="vep" data-title="Gelii" data-language-autonym="Vepsän kel’" data-language-local-name="vepse" class="interlanguage-link-target"><span>Vepsän kel’</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Heli" title="Heli - vietnamita" lang="vi" hreflang="vi" data-title="Heli" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-vls badge-Q17437796 badge-featuredarticle mw-list-item" title="article de qualitat"><a href="https://vls.wikipedia.org/wiki/Helium" title="Helium - flamenc occidental" lang="vls" hreflang="vls" data-title="Helium" data-language-autonym="West-Vlams" data-language-local-name="flamenc occidental" class="interlanguage-link-target"><span>West-Vlams</span></a></li><li class="interlanguage-link interwiki-vo mw-list-item"><a href="https://vo.wikipedia.org/wiki/Helin" title="Helin - volapük" lang="vo" hreflang="vo" data-title="Helin" data-language-autonym="Volapük" data-language-local-name="volapük" class="interlanguage-link-target"><span>Volapük</span></a></li><li class="interlanguage-link interwiki-wa mw-list-item"><a href="https://wa.wikipedia.org/wiki/Eliom" title="Eliom - való" lang="wa" hreflang="wa" data-title="Eliom" data-language-autonym="Walon" data-language-local-name="való" class="interlanguage-link-target"><span>Walon</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Helyo" title="Helyo - waray" lang="war" hreflang="war" data-title="Helyo" data-language-autonym="Winaray" data-language-local-name="waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E6%B0%A6" title="氦 - xinès wu" lang="wuu" hreflang="wuu" data-title="氦" data-language-autonym="吴语" data-language-local-name="xinès wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-xal mw-list-item"><a href="https://xal.wikipedia.org/wiki/%D0%93%D0%B5%D0%BB%D0%B8%D0%BE%D0%BD" title="Гелион - calmuc" lang="xal" hreflang="xal" data-title="Гелион" data-language-autonym="Хальмг" data-language-local-name="calmuc" class="interlanguage-link-target"><span>Хальмг</span></a></li><li class="interlanguage-link interwiki-xmf mw-list-item"><a href="https://xmf.wikipedia.org/wiki/%E1%83%B0%E1%83%94%E1%83%9A%E1%83%98%E1%83%A3%E1%83%9B%E1%83%98" title="ჰელიუმი - mingrelià" lang="xmf" hreflang="xmf" data-title="ჰელიუმი" data-language-autonym="მარგალური" data-language-local-name="mingrelià" class="interlanguage-link-target"><span>მარგალური</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%94%D7%A2%D7%9C%D7%99%D7%95%D7%9D" title="העליום - ídix" lang="yi" hreflang="yi" data-title="העליום" data-language-autonym="ייִדיש" data-language-local-name="ídix" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-yo mw-list-item"><a href="https://yo.wikipedia.org/wiki/H%C3%ADl%C3%AD%E1%BB%8D%CC%80m%C3%B9" title="Hílíọ̀mù - ioruba" lang="yo" hreflang="yo" data-title="Hílíọ̀mù" data-language-autonym="Yorùbá" data-language-local-name="ioruba" class="interlanguage-link-target"><span>Yorùbá</span></a></li><li class="interlanguage-link interwiki-zgh mw-list-item"><a href="https://zgh.wikipedia.org/wiki/%E2%B4%B0%E2%B5%80%E2%B5%89%E2%B5%8D%E2%B5%A2%E2%B5%93%E2%B5%8E" title="ⴰⵀⵉⵍⵢⵓⵎ - amazic estàndard marroquí" lang="zgh" hreflang="zgh" data-title="ⴰⵀⵉⵍⵢⵓⵎ" data-language-autonym="ⵜⴰⵎⴰⵣⵉⵖⵜ ⵜⴰⵏⴰⵡⴰⵢⵜ" data-language-local-name="amazic estàndard marroquí" class="interlanguage-link-target"><span>ⵜⴰⵎⴰⵣⵉⵖⵜ ⵜⴰⵏⴰⵡⴰⵢⵜ</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%B0%A6" title="氦 - xinès" lang="zh" hreflang="zh" data-title="氦" data-language-autonym="中文" data-language-local-name="xinès" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-classical mw-list-item"><a href="https://zh-classical.wikipedia.org/wiki/%E6%B0%A6" title="氦 - xinès clàssic" lang="lzh" hreflang="lzh" data-title="氦" data-language-autonym="文言" data-language-local-name="xinès clàssic" class="interlanguage-link-target"><span>文言</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Helium" title="Helium - xinès min del sud" lang="nan" hreflang="nan" data-title="Helium" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="xinès min del sud" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E6%B0%A6" title="氦 - cantonès" lang="yue" hreflang="yue" data-title="氦" data-language-autonym="粵語" data-language-local-name="cantonès" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-zu mw-list-item"><a href="https://zu.wikipedia.org/wiki/IHwelanga" title="IHwelanga - zulu" lang="zu" hreflang="zu" data-title="IHwelanga" data-language-autonym="IsiZulu" data-language-local-name="zulu" class="interlanguage-link-target"><span>IsiZulu</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q560#sitelinks-wikipedia" title="Modifica enllaços interlingües" class="wbc-editpage">Modifica els enllaços</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Espais de noms"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Heli" title="Vegeu el contingut de la pàgina [c]" accesskey="c"><span>Pàgina</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Discussi%C3%B3:Heli" rel="discussion" title="Discussió sobre el contingut d'aquesta pàgina [t]" accesskey="t"><span>Discussió</span></a></li> </ul> </div> </div> <div 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id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Eines</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Eines</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">amaga</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Més opcions" > <div class="vector-menu-heading"> Accions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Heli"><span>Mostra</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Heli&action=edit" title="Modifica el codi font d'aquesta pàgina [e]" accesskey="e"><span>Modifica</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Heli&action=history"><span>Mostra l'historial</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Especial:Enlla%C3%A7os/Heli" title="Una llista de totes les pàgines wiki que enllacen amb aquesta [j]" accesskey="j"><span>Què hi enllaça</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Especial:Seguiment/Heli" rel="nofollow" title="Canvis recents a pàgines enllaçades des d'aquesta pàgina [k]" accesskey="k"><span>Canvis relacionats</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Especial:P%C3%A0gines_especials" title="Llista totes les pàgines especials [q]" accesskey="q"><span>Pàgines especials</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Heli&oldid=34117496" title="Enllaç permanent a aquesta revisió de la pàgina"><span>Enllaç permanent</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Heli&action=info" title="Més informació sobre aquesta pàgina"><span>Informació de la pàgina</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Especial:Citau&page=Heli&id=34117496&wpFormIdentifier=titleform" title="Informació sobre com citar aquesta pàgina"><span>Citau aquest article</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Especial:UrlShortener&url=https%3A%2F%2Fca.wikipedia.org%2Fwiki%2FHeli"><span>Obtén una URL abreujada</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Especial:QrCode&url=https%3A%2F%2Fca.wikipedia.org%2Fwiki%2FHeli"><span>Descarrega el codi QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Imprimeix/exporta </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Especial:Llibre&bookcmd=book_creator&referer=Heli"><span>Crea un llibre</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Especial:DownloadAsPdf&page=Heli&action=show-download-screen"><span>Baixa com a PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Heli&printable=yes" title="Versió per a impressió d'aquesta pàgina [p]" accesskey="p"><span>Versió per a impressora</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> En altres projectes </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Helium" hreflang="en"><span>Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q560" title="Enllaç a l'element del repositori de dades connectat [g]" accesskey="g"><span>Element a Wikidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Eines de la pàgina"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Aparença"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Aparença</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">amaga</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">De la Viquipèdia, l'enciclopèdia lliure</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="ca" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r34261971">.mw-parser-output .hatnote{width:100%;border-color:#77ccff;color:var(--color-base,#202122);background-color:#f5f5f5;margin-bottom:1em;font-style:italic}.mw-parser-output .hatnote i{font-style:normal}@media screen{html.skin-theme-clientpref-night .mw-parser-output .hatnote{color:var(--color-inverted,#fff);background-color:var(--background-color-inverted,#101418)}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .hatnote{color:var(--color-inverted,#fff);background-color:var(--background-color-inverted,#101418)}}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style> <table class="hatnote" cellspacing="5"> <tbody><tr> <td style="width: 25px; vertical-align: top;"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Disambig_grey.svg/22px-Disambig_grey.svg.png" decoding="async" width="22" height="17" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Disambig_grey.svg/33px-Disambig_grey.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Disambig_grey.svg/44px-Disambig_grey.svg.png 2x" data-file-width="260" data-file-height="200" /></span></span> </td> <td>Aquest article tracta sobre el gas <b>heli</b>. Vegeu-ne altres significats a «<a href="/wiki/Heli_(desambiguaci%C3%B3)" class="mw-disambig" title="Heli (desambiguació)">Heli (desambiguació)</a>». </td></tr></tbody></table> <table class="infobox bordered" cellpadding="2" cellspacing="0" style="font-size: 88%; width: 22em; text-align: left"> <tbody><tr> <th colspan="2" style="font-size:130%;text-align:center; background-color: #C0FFFF; color: #008000">Heli </th></tr> <tr> <td colspan="2"><div title="atomic number Z=2; symbol=He" style="text-align:center; border:none; font-size:130%;"><b><sub><span style="font-size:smaller">2</span></sub>He</b></div> </td></tr> <tr> <td colspan="2"> <table width="100%" cellspacing="0" style="border: none; font-size: 110%"> <tbody><tr> <td colspan="2" style="text-align: center; border: none; font-size:88%;" class="nowrap"><a href="/wiki/Hidrogen" title="Hidrogen">hidrogen</a> ← <b>heli</b> → <a href="/wiki/Liti" title="Liti">liti</a> </td></tr> <tr style="border: none"> <td style="text-align: center; border: none; line-height:110%; font-size:88%;">-<br />↑<br /><b>He</b><br />↓<br /><a href="/wiki/Ne%C3%B3" title="Neó">Ne</a> </td> <td style="border: none"> <table width="100%" cellspacing="0" style="border: none"> <tbody><tr> <td style="border: none"><div style="position: relative; border: none"> <table class="nogrid" cellpadding="0" cellspacing="1" style="background-color: white; text-align: center; empty-cells: show; border: none"> <tbody><tr> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #a0ffa0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Hidrogen" title="Hidrogen"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 1: Hidrogen (H), altre no metall">   </span></a></div> </div> </td> <td colspan="30" style="border: none"> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #c0ffff; border:1px solid black; margin:-1px"><div style="position:absolute; top:0; left:0; z-index:3"><a class="mw-selflink selflink"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 2: Heli (He), gas noble">   </span></a></div> </div> </td></tr> <tr style="border: none"> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff6666;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Liti" title="Liti"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 3: Liti (Li), metall alcalí">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffdead;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Beril%C2%B7li" title="Beril·li"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 4: Beril·li (Be), metall alcalinoterri">   </span></a></div> </div> </td> <td colspan="24" style="border: none"> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccc99;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Bor" title="Bor"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 5: Bor (B), metal·loide">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #a0ffa0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Carboni" title="Carboni"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 6: Carboni (C), altre no metall">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #a0ffa0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Nitrogen" title="Nitrogen"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 7: Nitrogen (N), altre no metall">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #a0ffa0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Oxigen" title="Oxigen"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 8: Oxigen (O), altre no metall">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffff99;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Fluor" title="Fluor"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 9: Fluor (F), halogen">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #c0ffff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Ne%C3%B3" title="Neó"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 10: Neó (Ne), gas noble">   </span></a></div> </div> </td></tr> <tr style="border: none"> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff6666;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Sodi" title="Sodi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 11: Sodi (Na), metall alcalí">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffdead;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Magnesi" title="Magnesi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 12: Magnesi (Mg), metall alcalinoterri">   </span></a></div> </div> </td> <td colspan="24" style="border: none"> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccccc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Alumini" title="Alumini"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 13: Alumini (Al), metall del bloc p">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccc99;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Silici" title="Silici"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 14: Silici (Si), metal·loide">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #a0ffa0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/F%C3%B2sfor" title="Fòsfor"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 15: Fòsfor (P), altre no metall">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #a0ffa0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Sofre" title="Sofre"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 16: Sofre (S), altre no metall">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffff99;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Clor" title="Clor"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 17: Clor (Cl), halogen">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #c0ffff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Arg%C3%B3" title="Argó"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 18: Argó (Ar), gas noble">   </span></a></div> </div> </td></tr> <tr style="border: none"> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff6666;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Potassi" title="Potassi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 19: Potassi (K), metall alcalí">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffdead;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Calci" title="Calci"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 20: Calci (Ca), metall alcalinoterri">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Escandi" title="Escandi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 21: Escandi (Sc), metall de transició">   </span></a></div> </div> </td> <td colspan="14" style="border: none"> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Titani" title="Titani"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 22: Titani (Ti), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Vanadi" title="Vanadi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 23: Vanadi (V), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Crom" title="Crom"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 24: Crom (Cr), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Mangan%C3%A8s" title="Manganès"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 25: Manganès (Mn), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Ferro" title="Ferro"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 26: Ferro (Fe), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Cobalt" title="Cobalt"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 27: Cobalt (Co), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/N%C3%ADquel" title="Níquel"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 28: Níquel (Ni), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Coure" title="Coure"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 29: Coure (Cu), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Zinc" title="Zinc"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 30: Zinc (Zn), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccccc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Gal%C2%B7li" title="Gal·li"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 31: Gal·li (Ga), metall del bloc p">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccc99;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Germani" title="Germani"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 32: Germani (Ge), metal·loide">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccc99;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Ars%C3%A8nic" title="Arsènic"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 33: Arsènic (As), metal·loide">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #a0ffa0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Seleni" title="Seleni"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 34: Seleni (Se), altre no metall">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffff99;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Brom" title="Brom"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 35: Brom (Br), halogen">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #c0ffff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Cript%C3%B3" title="Criptó"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 36: Criptó (Kr), gas noble">   </span></a></div> </div> </td></tr> <tr style="border: none"> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff6666;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Rubidi" title="Rubidi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 37: Rubidi (Rb), metall alcalí">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffdead;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Estronci" title="Estronci"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 38: Estronci (Sr), metall alcalinoterri">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Itri" title="Itri"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 39: Itri (Y), metall de transició">   </span></a></div> </div> </td> <td colspan="14" style="border: none"> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Zirconi" title="Zirconi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 40: Zirconi (Zr), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Niobi" title="Niobi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 41: Niobi (Nb), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Molibd%C3%A8" title="Molibdè"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 42: Molibdè (Mo), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Tecneci" title="Tecneci"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 43: Tecneci (Tc), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Ruteni" title="Ruteni"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 44: Ruteni (Ru), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Rodi" title="Rodi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 45: Rodi (Rh), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Pal%C2%B7ladi_(element)" title="Pal·ladi (element)"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 46: Pal·ladi (element) (Pd), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Argent_(element)" class="mw-redirect" title="Argent (element)"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 47: Argent (element) (Ag), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Cadmi" title="Cadmi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 48: Cadmi (Cd), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccccc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Indi_(element)" title="Indi (element)"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 49: Indi (element) (In), metall del bloc p">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccccc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Estany_(element)" title="Estany (element)"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 50: Estany (Sn), metall del bloc p">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccc99;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Antimoni" title="Antimoni"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 51: Antimoni (Sb), metal·loide">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccc99;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Tel%C2%B7luri" title="Tel·luri"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 52: Tel·luri (Te), metal·loide">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffff99;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Iode" title="Iode"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 53: Iode (I), halogen">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #c0ffff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Xen%C3%B3" title="Xenó"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 54: Xenó (Xe), gas noble">   </span></a></div> </div> </td></tr> <tr style="border: none"> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff6666;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Cesi" title="Cesi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 55: Cesi (Cs), metall alcalí">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffdead;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Bari_(element)" title="Bari (element)"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 56: Bari (Ba), metall alcalinoterri">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Lantani" title="Lantani"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 57: Lantani (La), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Ceri" title="Ceri"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 58: Ceri (Ce), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Praseodimi" title="Praseodimi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 59: Praseodimi (Pr), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Neodimi" title="Neodimi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 60: Neodimi (Nd), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Prometi" title="Prometi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 61: Prometi (Pm), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Samari" title="Samari"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 62: Samari (Sm), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Europi" title="Europi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 63: Europi (Eu), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Gadolini" title="Gadolini"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 64: Gadolini (Gd), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Terbi" title="Terbi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 65: Terbi (Tb), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Disprosi" title="Disprosi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 66: Disprosi (Dy), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Holmi" title="Holmi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 67: Holmi (Ho), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Erbi" title="Erbi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 68: Erbi (Er), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Tuli" title="Tuli"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 69: Tuli (Tm), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Iterbi" title="Iterbi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 70: Iterbi (Yb), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffbfff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Luteci" title="Luteci"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 71: Luteci (Lu), lantànid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Hafni" title="Hafni"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 72: Hafni (Hf), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/T%C3%A0ntal" title="Tàntal"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 73: Tàntal (Ta), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Tungst%C3%A8" title="Tungstè"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 74: Tungstè (W), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Reni" title="Reni"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 75: Reni (Re), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Osmi" title="Osmi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 76: Osmi (Os), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Iridi" title="Iridi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 77: Iridi (Ir), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Plat%C3%AD" title="Platí"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 78: Platí (Pt), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Or" title="Or"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 79: Or (Au), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Mercuri_(element)" title="Mercuri (element)"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 80: Mercuri (Hg), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccccc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Tal%C2%B7li" title="Tal·li"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 81: Tal·li (Tl), metall del bloc p">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccccc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Plom" title="Plom"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 82: Plom (Pb), metall del bloc p">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccccc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Bismut" title="Bismut"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 83: Bismut (Bi), metall del bloc p">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccccc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Poloni" title="Poloni"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 84: Poloni (Po), metall del bloc p">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffff99;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/%C3%80stat" title="Àstat"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 85: Àstat (At), halogen">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #c0ffff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Rad%C3%B3" title="Radó"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 86: Radó (Rn), gas noble">   </span></a></div> </div> </td></tr> <tr style="border: none"> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff6666;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Franci" title="Franci"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 87: Franci (Fr), metall alcalí">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffdead;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Radi_(element)" title="Radi (element)"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 88: Radi (Ra), metall alcalinoterri">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Actini" title="Actini"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 89: Actini (Ac), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Tori" title="Tori"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 90: Tori (Th), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Protoactini" title="Protoactini"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 91: Protoactini (Pa), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Urani" title="Urani"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 92: Urani (U), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Neptuni" title="Neptuni"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 93: Neptuni (Np), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Plutoni" title="Plutoni"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 94: Plutoni (Pu), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Americi" title="Americi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 95: Americi (Am), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Curi" title="Curi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 96: Curi (Cm), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Berkeli" title="Berkeli"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 97: Berkeli (Bk), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Californi" title="Californi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 98: Californi (Cf), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Einsteini" title="Einsteini"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 99: Einsteini (Es), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Fermi_(element)" title="Fermi (element)"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 100: Fermi (Fm), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Mendelevi" title="Mendelevi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 101: Mendelevi (Md), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Nobeli" title="Nobeli"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 102: Nobeli (No), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ff99cc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Laurenci" class="mw-redirect" title="Laurenci"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 103: Laurenci (Lr), actínid">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Rutherfordi" title="Rutherfordi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 104: Rutherfordi (Rf), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Dubni" title="Dubni"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 105: Dubni (Db), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Seaborgi" title="Seaborgi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 106: Seaborgi (Sg), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Bohri" title="Bohri"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 107: Bohri (Bh), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Hassi" title="Hassi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 108: Hassi (Hs), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Meitneri" title="Meitneri"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 109: Meitneri (Mt), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Darmstadti" title="Darmstadti"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 110: Darmstadti (Ds), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Roentgeni" title="Roentgeni"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 111: Roentgeni (Rg), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffc0c0;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Copernici" title="Copernici"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 112: Copernici (Cn), metall de transició">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccccc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Nihoni" title="Nihoni"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 113: Nihoni (Nh), metall del bloc p">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccccc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Flerovi" title="Flerovi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 114: Flerovi (Fl), metall del bloc p">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccccc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Moscovi" title="Moscovi"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 115: Moscovi (Mc), metall del bloc p">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #cccccc;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Livermori" title="Livermori"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 116: Livermori (Lv), metall del bloc p">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #ffff99;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Tennes" title="Tennes"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 117: Tennes (Ts), halogen">   </span></a></div> </div> </td> <td style="border: none"><div style="position:relative; overflow:hidden; width:6px; height:8px; z-index:2; background-color: #c0ffff;"><div style="position:absolute; top:0; left:0; z-index:3"><a href="/wiki/Oganess%C3%B3" title="Oganessó"><span style="float:left; width:7px; height:9px; font-size:9px; line-height:9px; word-spacing:7px; cursor:pointer;" title="Element 118: Oganessó (Og), gas noble">   </span></a></div> </div> </td></tr></tbody></table> <div style="position: absolute; top: 1px; left: 30px; border: none"><span typeof="mw:File"><a href="/wiki/Fitxer:Hexagonal.svg" class="mw-file-description" title="Heli té una estructura cristal·lina hexagonal"><img alt="Heli té una estructura cristal·lina hexagonal" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Hexagonal.svg/26px-Hexagonal.svg.png" decoding="async" width="26" height="27" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Hexagonal.svg/39px-Hexagonal.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Hexagonal.svg/52px-Hexagonal.svg.png 2x" data-file-width="295" data-file-height="304" /></a></span></div> <div style="border: none; font-size: 8px; position: absolute; top: 0; left: 65px"><span typeof="mw:File"><a href="/wiki/Fitxer:Electron_shell_002_Helium.svg" class="mw-file-description"><img alt="Electrons per capa" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/46/Electron_shell_002_Helium.svg/42px-Electron_shell_002_Helium.svg.png" decoding="async" width="42" height="45" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/46/Electron_shell_002_Helium.svg/63px-Electron_shell_002_Helium.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/46/Electron_shell_002_Helium.svg/84px-Electron_shell_002_Helium.svg.png 2x" data-file-width="800" data-file-height="860" /></a></span> </div> </div> <div style="border: none; text-align: right"><small><a href="/wiki/Taula_peri%C3%B2dica" title="Taula periòdica">Taula periòdica</a></small></div> </td></tr></tbody></table> </td></tr></tbody></table> </td></tr> <tr> <th colspan="2" style="text-align: center; background-color: #C0FFFF; color: #008000">Aspecte </th></tr> <tr> <td colspan="2" style="text-align: center">Gas incolor que mostra una resplendor vermella-taronja quan es col·loca en un camp elèctric d'alt voltatge<br /><span typeof="mw:File"><a href="/wiki/Fitxer:Helium_discharge_tube.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/82/Helium_discharge_tube.jpg/300px-Helium_discharge_tube.jpg" decoding="async" width="300" height="200" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/82/Helium_discharge_tube.jpg/450px-Helium_discharge_tube.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/82/Helium_discharge_tube.jpg/600px-Helium_discharge_tube.jpg 2x" data-file-width="3008" data-file-height="2008" /></a></span><br /><br /><span typeof="mw:File"><a href="/wiki/Fitxer:Helium_spectrum_visible.png" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Helium_spectrum_visible.png/300px-Helium_spectrum_visible.png" decoding="async" width="300" height="52" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Helium_spectrum_visible.png/450px-Helium_spectrum_visible.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Helium_spectrum_visible.png/600px-Helium_spectrum_visible.png 2x" data-file-width="7430" data-file-height="1280" /></a></span><br />Línies espectrals de l'heli </td></tr> <tr> <th colspan="2" style="text-align: center; background-color: #C0FFFF; color: #008000">Propietats generals </th></tr> <tr> <th>Nom, <a href="/wiki/S%C3%ADmbol_qu%C3%ADmic" title="Símbol químic">símbol</a>, <a href="/wiki/Nombre_at%C3%B2mic" title="Nombre atòmic">nombre</a> </th> <td>Heli, He, 2 </td></tr> <tr> <th><a href="/wiki/Denominacions_col%C2%B7lectives_de_grups_d%27elements_de_caracter%C3%ADstiques_similars" title="Denominacions col·lectives de grups d'elements de característiques similars">Categoria d'elements</a> </th> <td><a href="/wiki/Gasos_nobles" class="mw-redirect" title="Gasos nobles">Gasos nobles</a> </td></tr> <tr> <th><a href="/wiki/Grup_(taula_peri%C3%B2dica)" class="mw-redirect" title="Grup (taula periòdica)">Grup</a>, <a href="/wiki/Per%C3%ADode_(taula_peri%C3%B2dica)" class="mw-redirect" title="Període (taula periòdica)">període</a>, <a href="/wiki/Bloc_(taula_peri%C3%B2dica)" class="mw-redirect" title="Bloc (taula periòdica)">bloc</a> </th> <td><a href="/wiki/Grup_18_de_la_taula_peri%C3%B2dica" class="mw-redirect" title="Grup 18 de la taula periòdica">18</a>, <a href="/wiki/Elements_del_per%C3%ADode_1" title="Elements del període 1">1</a>, <a href="/wiki/Elements_del_bloc_s" title="Elements del bloc s">s</a> </td></tr> <tr> <th><a href="/wiki/Pes_at%C3%B2mic" class="mw-redirect" title="Pes atòmic">Pes atòmic estàndard</a> </th> <td>4,002602(2) </td></tr> <tr> <th><a href="/wiki/Configuraci%C3%B3_electr%C3%B2nica" title="Configuració electrònica">Configuració electrònica</a> </th> <td>1s<sup>2</sup><br />2<br /><span typeof="mw:File"><a href="/wiki/Fitxer:Electron_shell_002_Helium_-_no_label.svg" class="mw-file-description" title="Configuració electrònica de Heli"><img alt="Configuració electrònica de Heli" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/84/Electron_shell_002_Helium_-_no_label.svg/140px-Electron_shell_002_Helium_-_no_label.svg.png" decoding="async" width="140" height="140" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/84/Electron_shell_002_Helium_-_no_label.svg/210px-Electron_shell_002_Helium_-_no_label.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/84/Electron_shell_002_Helium_-_no_label.svg/280px-Electron_shell_002_Helium_-_no_label.svg.png 2x" data-file-width="800" data-file-height="800" /></a></span> </td></tr> <tr> <th colspan="2" style="text-align: center; background-color: #C0FFFF; color: #008000">Propietats físiques </th></tr> <tr> <th><a href="/wiki/Fase_(mat%C3%A8ria)" class="mw-redirect" title="Fase (matèria)">Fase</a> </th> <td><a href="/wiki/Gas" title="Gas">gas</a> </td></tr> <tr> <th><a href="/wiki/Densitat" title="Densitat">Densitat</a> </th> <td>(0 °C, 101.325 <a href="/wiki/Pascal_(unitat)" title="Pascal (unitat)">kPa</a>)<br />0,1786 g/L </td></tr> <tr> <th>Densitat del<br />líquid en el <a href="/wiki/Punt_de_fusi%C3%B3" title="Punt de fusió">p. f.</a> </th> <td>0,145 g·cm<sup>−3</sup> </td></tr> <tr> <th><a href="/wiki/Punt_de_fusi%C3%B3" title="Punt de fusió">Punt de fusió</a> </th> <td>(a 2,5 MPa) 0,95 <a href="/wiki/Kelvin" title="Kelvin">K</a>, −272,20 °C </td></tr> <tr> <th><a href="/wiki/Punt_d%27ebullici%C3%B3" title="Punt d'ebullició">Punt d'ebullició</a> </th> <td>4,22 K, −268,93 °C </td></tr> <tr> <th><a href="/wiki/Punt_cr%C3%ADtic" title="Punt crític">Punt crític</a> </th> <td>5,19 K, 0,227 MPa </td></tr> <tr> <th><a href="/wiki/Entalpia_de_fusi%C3%B3" class="mw-redirect" title="Entalpia de fusió">Entalpia de fusió</a> </th> <td>0,0138 <a href="/wiki/Quilojoule_per_mol" class="mw-redirect" title="Quilojoule per mol">kJ·mol<sup>−1</sup></a> </td></tr> <tr> <th><a href="/wiki/Entalpia_de_vaporitzaci%C3%B3" class="mw-redirect" title="Entalpia de vaporització">Entalpia de vaporització</a> </th> <td>0,0829 kJ·mol<sup>−1</sup> </td></tr> <tr> <th><a href="/wiki/Capacitat_calor%C3%ADfica" class="mw-redirect" title="Capacitat calorífica">Capacitat calorífica molar</a> </th> <td>5<a href="/wiki/Constant_de_gasos" class="mw-redirect" title="Constant de gasos">R</a>/2 = 20,786 J·mol<sup>−1</sup>·K<sup>−1</sup> </td></tr> <tr> <th colspan="2" style="text-align: center"><a href="/wiki/Pressi%C3%B3_de_vapor" title="Pressió de vapor">Pressió de vapor</a> (definida per la <a href="/w/index.php?title=ITS-90&action=edit&redlink=1" class="new" title="ITS-90 (encara no existeix)">ITS-90</a>) </th></tr> <tr> <td colspan="2"> <table class="wikitable" style="width: 100%; border-collapse: collapse"> <tbody><tr align="center"> <td>P (Pa) </td> <td>1 </td> <td>10 </td> <td>100 </td> <td>1 k </td> <td>10 k </td> <td>100 k </td></tr> <tr align="center"> <td>a T (K) </td> <td>  </td> <td>  </td> <td>1,23 </td> <td>1,67 </td> <td>2,48 </td> <td>4,21 </td></tr></tbody></table> </td></tr> <tr> <th colspan="2" style="text-align: center; background-color: #C0FFFF; color: #008000">Propietats atòmiques </th></tr> <tr> <th><a href="/wiki/Electronegativitat" title="Electronegativitat">Electronegativitat</a> </th> <td>Sense dades (escala de Pauling) </td></tr> <tr> <th rowspan="2" valign="top"><a href="/wiki/Energia_d%27ionitzaci%C3%B3" title="Energia d'ionització">Energies d'ionització</a> </th> <td>1a: 2.372,3 kJ·mol<sup>−1</sup> </td></tr> <tr> <td>2a: 5.250,5 kJ·mol<sup>−1</sup> </td></tr> <tr> <th><a href="/wiki/Radi_covalent" title="Radi covalent">Radi covalent</a> </th> <td><a href="/w/index.php?title=1_E%E2%88%9211_m&action=edit&redlink=1" class="new" title="1 E−11 m (encara no existeix)">28</a> pm </td></tr> <tr> <th><a href="/wiki/Radi_de_Van_der_Waals" class="mw-redirect" title="Radi de Van der Waals">Radi de Van der Waals</a> </th> <td><a href="/w/index.php?title=1_E%E2%88%9210_m&action=edit&redlink=1" class="new" title="1 E−10 m (encara no existeix)">140</a> pm </td></tr> <tr> <th colspan="2" style="text-align: center; background-color: #C0FFFF; color: #008000">Miscel·lània </th></tr> <tr> <th><a href="/wiki/Estructura_cristal%C2%B7lina" title="Estructura cristal·lina">Estructura cristal·lina</a> </th> <td><a href="/wiki/Sistema_hexagonal" title="Sistema hexagonal">Hexagonal</a> <br /> <span typeof="mw:File"><a href="/wiki/Fitxer:Hexagonal.svg" class="mw-file-description" title="Heli té una estructura cristal·lina hexagonal"><img alt="Heli té una estructura cristal·lina hexagonal" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Hexagonal.svg/60px-Hexagonal.svg.png" decoding="async" width="60" height="62" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Hexagonal.svg/90px-Hexagonal.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c2/Hexagonal.svg/120px-Hexagonal.svg.png 2x" data-file-width="295" data-file-height="304" /></a></span> </td></tr> <tr> <th rowspan="1" valign="top"><a href="/wiki/Magnetisme" title="Magnetisme">Ordenació magnètica</a> </th> <td><a href="/wiki/Diamagn%C3%A8tic" class="mw-redirect" title="Diamagnètic">Diamagnètic</a><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> </td></tr> <tr> <th><a href="/wiki/Conductivitat_t%C3%A8rmica" title="Conductivitat tèrmica">Conductivitat tèrmica</a> </th> <td>0,1513 W·m<sup>−1</sup>·K<sup>−1</sup> </td></tr> <tr> <th><a href="/wiki/Velocitat_del_so" title="Velocitat del so">Velocitat del so</a> </th> <td>972 <a href="/wiki/Metre_per_segon" title="Metre per segon">m·s<sup>−1</sup></a> </td></tr> <tr> <th><a href="/wiki/Nombre_CAS" class="mw-redirect" title="Nombre CAS">Nombre CAS</a> </th> <td>7440-59-7 </td></tr> <tr> <th colspan="2" style="text-align: center; background-color: #C0FFFF; color: #008000">Isòtops més estables </th></tr> <tr> <td colspan="2" style="text-align: center">Article principal: <a href="/wiki/Is%C3%B2tops_de_l%27heli" title="Isòtops de l'heli">Isòtops de l'heli</a> </td></tr> <tr> <td colspan="2"> <table class="wikitable" style="text-align: center; width: 100%; border-collapse: collapse"> <tbody><tr> <th><a href="/wiki/Is%C3%B2top" title="Isòtop">Iso</a> </th> <th><a href="/wiki/Abund%C3%A0ncia_natural" title="Abundància natural">AN</a> </th> <th><a href="/wiki/Per%C3%ADode_de_semidesintegraci%C3%B3" title="Període de semidesintegració">Semivida</a> </th> <th><a href="/wiki/Mode_de_desintegraci%C3%B3" class="mw-redirect" title="Mode de desintegració">MD</a> </th> <th><a href="/wiki/Energia_de_desintegraci%C3%B3" title="Energia de desintegració">ED</a> <small>(<a href="/wiki/Electr%C3%B3_volt" class="mw-redirect" title="Electró volt">MeV</a>)</small> </th> <th><a href="/wiki/Producte_de_desintegraci%C3%B3" title="Producte de desintegració">PD</a> </th></tr> <tr> <td><a href="/wiki/Heli-3" class="mw-redirect" title="Heli-3"><sup>3</sup>He</a> </td> <td>0,000137%* </td> <td colspan="4"><sup>3</sup>He és <a href="/wiki/Is%C3%B2top_estable" class="mw-redirect" title="Isòtop estable">estable</a> amb 1 <a href="/wiki/Neutr%C3%B3" title="Neutró">neutró</a> </td></tr> <tr> <td><a href="/wiki/Heli-4" class="mw-redirect" title="Heli-4"><sup>4</sup>He</a> </td> <td>99,999863%* </td> <td colspan="4"><sup>4</sup>He és <a href="/wiki/Is%C3%B2top_estable" class="mw-redirect" title="Isòtop estable">estable</a> amb 2 <a href="/wiki/Neutr%C3%B3" title="Neutró">neutrons</a> </td></tr> <tr> <td colspan="6" style="text-align: center">*<small>Valor atmosfèric; altrament l'abundància pot diferir.</small> </td></tr></tbody></table> </td></tr> </tbody></table> <p>L'<b>heli</b> és l'<a href="/wiki/Element_qu%C3%ADmic" title="Element químic">element químic</a> de símbol <b>He</b> i <a href="/wiki/Nombre_at%C3%B2mic" title="Nombre atòmic">nombre atòmic</a> 2. És un <a href="/wiki/Gas" title="Gas">gas</a> <a href="/wiki/Monoat%C3%B2mic" title="Monoatòmic">monoatòmic</a> <a href="/wiki/Inert" title="Inert">inert</a>, no tòxic, incolor, inodor i insípid que encapçala el grup dels <a href="/wiki/Gasos_nobles" class="mw-redirect" title="Gasos nobles">gasos nobles</a> en la <a href="/wiki/Taula_peri%C3%B2dica" title="Taula periòdica">taula periòdica</a>. Els seus <a href="/wiki/Punt_d%27ebullici%C3%B3" title="Punt d'ebullició">punts d'ebullició</a> i de <a href="/wiki/Punt_de_fusi%C3%B3" title="Punt de fusió">fusió</a> són uns dels més baixos de tots els elements, i només existeix en forma de gas, excepte en condicions extremes. </p><p>El 1868, l'astrònom francès <a href="/wiki/Pierre_Janssen" title="Pierre Janssen">Pierre Janssen</a> observà per primer cop una signatura de <a href="/wiki/Espectrosc%C3%B2pia" title="Espectroscòpia">línia espectral</a> en la llum solar en un <a href="/wiki/Eclipsi_de_sol" class="mw-redirect" title="Eclipsi de sol">eclipsi de sol</a>. S'atribueix a Janssen el <a href="/w/index.php?title=Descobriment_dels_elements_qu%C3%ADmics&action=edit&redlink=1" class="new" title="Descobriment dels elements químics (encara no existeix)">descobriment de l'element</a> juntament amb <a href="/wiki/Norman_Lockyer" title="Norman Lockyer">Norman Lockyer</a>, que observà el mateix eclipsi i fou el primer a proposar que la línia es devia a un nou element que anomenà <i>heli</i>. El 1903, es descobriren grans reserves d'heli als <a href="/w/index.php?title=Jaciment_de_gas_natural&action=edit&redlink=1" class="new" title="Jaciment de gas natural (encara no existeix)">jaciments de gas natural</a> dels <a href="/wiki/Estats_Units" class="mw-redirect" title="Estats Units">Estats Units</a>, que són de llarg el major subministrador d'aquest gas. L'heli s'utilitza en la <a href="/wiki/Criog%C3%A8nia" title="Criogènia">criogènia</a>, en <a href="/w/index.php?title=H%C3%A8liox&action=edit&redlink=1" class="new" title="Hèliox (encara no existeix)">sistemes de respiració en profunditat</a>, per a refredar <a href="/wiki/Imant_superconductor" class="mw-redirect" title="Imant superconductor">imants superconductors</a>, en la <a href="/w/index.php?title=Dataci%C3%B3_per_heli&action=edit&redlink=1" class="new" title="Datació per heli (encara no existeix)">datació per heli</a>, per a inflar globus, per a proporcionar sustentació en <a href="/wiki/Dirigible" title="Dirigible">dirigibles</a> i com a gas protector en molts usos industrials (com en la <a href="/wiki/Soldadura_per_arc" title="Soldadura per arc">soldadura per arc</a> o en la producció d'<a href="/wiki/Oblia_(electr%C3%B2nica)" title="Oblia (electrònica)">oblies</a>). La inhalació d'un volum reduït del gas canvia temporalment el timbre i la qualitat de la veu humana. El comportament de les dues fases fluides de l'heli-4 líquid, l'heli I i l'heli II és important per als investigadors que estudien la <a href="/wiki/Mec%C3%A0nica_qu%C3%A0ntica" title="Mecànica quàntica">mecànica quàntica</a> (en particular, el fenomen de la <a href="/wiki/Superflu%C3%AFdesa" class="mw-redirect" title="Superfluïdesa">superfluïdesa</a>) i per als que observen els efectes que tenen les temperatures properes al <a href="/wiki/Zero_absolut" title="Zero absolut">zero absolut</a> sobre la <a href="/wiki/Mat%C3%A8ria" title="Matèria">matèria</a> (com ara, la <a href="/wiki/Superconductivitat" title="Superconductivitat">superconductivitat</a>). </p><p>L'heli és el segon element més lleuger i és el segon element <a href="/wiki/Abund%C3%A0ncia_dels_elements" class="mw-redirect" title="Abundància dels elements">més abundant</a> en l'univers observable. La majoria d'heli es formà durant el <a href="/wiki/Big-bang" title="Big-bang">big-bang</a>, però actualment es crea nou heli com a resultat de la <a href="/wiki/Fusi%C3%B3_nuclear" title="Fusió nuclear">fusió nuclear</a> d'<a href="/wiki/Hidrogen" title="Hidrogen">hidrogen</a> a les <a href="/wiki/Estrelles" class="mw-redirect" title="Estrelles">estrelles</a>. A la <a href="/wiki/Terra" title="Terra">Terra</a>, l'heli és relativament rar i és creat per la <a href="/wiki/Radioactivitat" title="Radioactivitat">desintegració</a> d'alguns elements, car les <a href="/wiki/Part%C3%ADcula_alfa" class="mw-redirect" title="Partícula alfa">partícules alfa</a> emeses consisteixen en <a href="/wiki/Nucli_at%C3%B2mic" title="Nucli atòmic">nuclis</a> d'heli. Aquest heli radiogen queda atrapat amb el <a href="/wiki/Gas_natural" title="Gas natural">gas natural</a> en concentracions de fins a un 7% en volum, el qual s'extreu comercialment mitjançant un procés de separació a baixa temperatura anomenada <i><a href="/wiki/Destil%C2%B7laci%C3%B3_fraccionada" title="Destil·lació fraccionada">destil·lació fraccionada</a></i>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Història"><span id="Hist.C3.B2ria"></span>Història</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Heli&action=edit&section=1" title="Modifica la secció: Història"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La primera prova de l'heli fou observada el 18 d'agost del 1868, en forma d'una línia groga lluent amb una <a href="/wiki/Longitud_d%27ona" title="Longitud d'ona">longitud d'ona</a> de 587,49 nanòmetres en l'<a href="/wiki/Espectre_d%27emissi%C3%B3" title="Espectre d'emissió">espectre</a> de la <a href="/wiki/Cromosfera" title="Cromosfera">cromosfera</a> del <a href="/wiki/Sol" title="Sol">Sol</a>. La línia fou detectada per l'astrònom francès <a href="/wiki/Pierre_Janssen" title="Pierre Janssen">Pierre Janssen</a> durant un <a href="/wiki/Eclipsi_solar" class="mw-redirect" title="Eclipsi solar">eclipsi solar</a> total a <a href="/wiki/Guntur" title="Guntur">Guntur</a> (<a href="/wiki/Raj_Brit%C3%A0nic" class="mw-redirect" title="Raj Britànic">Índia</a>).<sup id="cite_ref-frnch_2-0" class="reference"><a href="#cite_note-frnch-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-nbb_3-0" class="reference"><a href="#cite_note-nbb-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-nbb_3-1" class="reference"><a href="#cite_note-nbb-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Inicialment, s'assumí que aquesta línia era de <a href="/wiki/Sodi" title="Sodi">sodi</a>. El 20 d'octubre del mateix any, l'astrònom anglès <a href="/wiki/Norman_Lockyer" title="Norman Lockyer">Norman Lockyer</a> observà una línia groga en l'espectre solar, que denominà <i><a href="/w/index.php?title=L%C3%ADnia_de_Fraunhofer&action=edit&redlink=1" class="new" title="Línia de Fraunhofer (encara no existeix)">línia de Fraunhofer</a></i> <i>D₃</i>, car estava a prop de les línies conegudes del sodi D<sub>1</sub> i D₂.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Conclogué que era causada per un element del Sol desconegut a la Terra. Lockyer i el químic anglès <a href="/wiki/Edward_Frankland" title="Edward Frankland">Edward Frankland</a> batejaren l'element amb el mot grec per dir «sol», ἥλιος (<i>hélios</i>).<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:Helium_spectrum.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/80/Helium_spectrum.jpg/220px-Helium_spectrum.jpg" decoding="async" width="220" height="66" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/80/Helium_spectrum.jpg/330px-Helium_spectrum.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/80/Helium_spectrum.jpg/440px-Helium_spectrum.jpg 2x" data-file-width="506" data-file-height="151" /></a><figcaption>Línies espectrals de l'heli</figcaption></figure> <p>El 26 de març del 1895, el químic britànic <a href="/wiki/William_Ramsay" title="William Ramsay"><i>sir</i> William Ramsay</a> aïlla heli a la Terra, tractant el mineral <a href="/wiki/Cleve%C3%AFta" title="Cleveïta">cleveïta</a> (una varietat d'<a href="/wiki/Uraninita" title="Uraninita">uraninita</a> amb almenys un 10% de <a href="/wiki/Terra_rara" title="Terra rara">terres rares</a>) amb <a href="/wiki/%C3%80cids" class="mw-redirect" title="Àcids">àcids</a> minerals. Ramsay buscava <a href="/wiki/Arg%C3%B3" title="Argó">argó</a>, però, després de separar el <a href="/wiki/Nitrogen" title="Nitrogen">nitrogen</a> i l'<a href="/wiki/Oxigen" title="Oxigen">oxigen</a> del gas alliberat per l'<a href="/wiki/%C3%80cid_sulf%C3%BAric" title="Àcid sulfúric">àcid sulfúric</a>, remarcà una línia groga lluent que es corresponia amb la línia D₃ observada en l'espectre solar.<sup id="cite_ref-Encyc_257_7-0" class="reference"><a href="#cite_note-Encyc_257-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> Aquestes mostres foren identificades com a heli per Lockyer i el físic britànic <a href="/wiki/William_Crookes" title="William Crookes">William Crookes</a>. Aquell mateix any, l'heli fou aïllat independentment, també a partir de cleveïta, pels químics <a href="/wiki/Per_Teodor_Cleve" title="Per Teodor Cleve">Per Teodor Cleve</a> i <a href="/w/index.php?title=Abraham_Langlet&action=edit&redlink=1" class="new" title="Abraham Langlet (encara no existeix)">Abraham Langlet</a> a <a href="/wiki/Uppsala" title="Uppsala">Uppsala</a> (<a href="/wiki/Su%C3%A8cia" title="Suècia">Suècia</a>), que recolliren prou quantitat de gas per determinar-ne amb precisió el <a href="/wiki/Pes_at%C3%B2mic" class="mw-redirect" title="Pes atòmic">pes atòmic</a>.<sup id="cite_ref-nbb_3-2" class="reference"><a href="#cite_note-nbb-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> L'heli també fou aïllat pel geoquímic estatunidenc <a href="/wiki/William_Francis_Hillebrand" title="William Francis Hillebrand">William Francis Hillebrand</a> abans del descobriment de Ramsayy, quan observà línies espectrals inusuals mentre experimentava amb una mostra del mineral uraninita. Tanmateix, Hillebrand atribuí les línies al nitrogen. La seva carta de felicitació a Ramsay és un cas interessant de descobriment i quasidescobriment en la ciència.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p><p>El 1907, <a href="/wiki/Ernest_Rutherford" title="Ernest Rutherford">Ernest Rutherford</a> i Thomas Royds demostraren que les <a href="/wiki/Part%C3%ADcules_alfa" class="mw-redirect" title="Partícules alfa">partícules alfa</a> són <a href="/wiki/Nucli_at%C3%B2mic" title="Nucli atòmic">nuclis</a> d'heli, permetent que les partícules penetressin la prima paret de vidre d'un tub evacuat i després creant una descàrrega al tub per estudiar l'espectre del nou gas que es trobava a l'interior. El 1908, el físic neerlandès <a href="/wiki/Heike_Kamerlingh_Onnes" title="Heike Kamerlingh Onnes">Heike Kamerlingh Onnes</a> fou el primer a liquar l'heli, refredant el gas a una temperatura de menys d'un <a href="/wiki/Kelvin" title="Kelvin">kelvin</a>.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> Intentà solidificar-lo reduint encara més la temperatura, però no ho aconseguí, car l'heli no té una temperatura de <a href="/wiki/Punt_triple" title="Punt triple">punt triple</a> en què els estats sòlid, líquid i gasós estiguin en equilibri. L'estudiant d'Onnes <a href="/w/index.php?title=Willem_Hendrik_Keesom&action=edit&redlink=1" class="new" title="Willem Hendrik Keesom (encara no existeix)">Willem Hendrik Keesom</a> fou, finalment, capaç de solidificar 1 cm³ d'heli el 1926.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p><p>El 1938, el físic rus <a href="/wiki/Piotr_Leon%C3%ADdovitx_Kapitsa" title="Piotr Leonídovitx Kapitsa">Piotr Leonídovitx Kapitsa</a> descobrí que l'<a href="/wiki/Heli-4" class="mw-redirect" title="Heli-4">heli-4</a> gairebé no té <a href="/wiki/Viscositat" title="Viscositat">viscositat</a> a temperatures properes al <a href="/wiki/Zero_absolut" title="Zero absolut">zero absolut</a>, un fenomen actualment conegut com a <i><a href="/wiki/Superflu%C3%AFdesa" class="mw-redirect" title="Superfluïdesa">superfluïdesa</a></i>.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> Aquest fenomen té a veure amb la <a href="/wiki/Condensaci%C3%B3_de_Bose-Einstein" class="mw-redirect" title="Condensació de Bose-Einstein">condensació de Bose-Einstein</a>. El 1972, els físics estatunidencs <a href="/wiki/Douglas_Dean_Osheroff" title="Douglas Dean Osheroff">Douglas Dean Osheroff</a>, <a href="/wiki/David_Morris_Lee" title="David Morris Lee">David Morris Lee</a> i <a href="/wiki/Robert_Coleman_Richardson" title="Robert Coleman Richardson">Robert Coleman Richardson</a> observaren el mateix fenomen en l'<a href="/wiki/Heli-3" class="mw-redirect" title="Heli-3">heli-3</a>, però a temperatures molt més properes al zero absolut. Es creu que l'ocurrència del fenomen en l'heli-3 està relacionada amb l'aparellament de <a href="/wiki/Fermions" class="mw-redirect" title="Fermions">fermions</a> d'heli-3 per formar <a href="/wiki/Bosons" class="mw-redirect" title="Bosons">bosons</a>, de manera anàloga a com <a href="/wiki/Parells_de_Cooper" class="mw-redirect" title="Parells de Cooper">parells de Cooper</a> d'electrons produeixen <a href="/wiki/Superconductivitat" title="Superconductivitat">superconductivitat</a>.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Abundància_i_obtenció"><span id="Abund.C3.A0ncia_i_obtenci.C3.B3"></span>Abundància i obtenció</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Heli&action=edit&section=2" title="Modifica la secció: Abundància i obtenció"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>L'heli és el segon element més abundant de l'<a href="/wiki/Univers" title="Univers">Univers</a> després de l'<a href="/wiki/Hidrogen" title="Hidrogen">hidrogen</a> i constitueix al voltant del 20% de la matèria de les <a href="/wiki/Estrella" class="mw-redirect" title="Estrella">estrelles</a>, ja que intervé en el procés de <a href="/wiki/Fusi%C3%B3_nuclear" title="Fusió nuclear">fusió nuclear</a>. L'abundància d'heli no pot ser explicada per la generada en les estrelles, encara que és consistent amb el model del <a href="/wiki/Big-bang" title="Big-bang">big-bang</a>, i es creu que la major part de l'heli existent es va formar en els tres primers minuts de l'Univers. </p><p>En l'atmosfera terrestre, hi ha de l'ordre de 5 <a href="/wiki/Parts_per_mili%C3%B3" class="mw-redirect" title="Parts per milió">ppm</a> i es troba també com a <a href="/wiki/Producte_de_desintegraci%C3%B3" title="Producte de desintegració">producte de desintegració</a> en diversos <a href="/wiki/Minerals" class="mw-redirect" title="Minerals">minerals</a> <a href="/wiki/Radioactiu" class="mw-redirect" title="Radioactiu">radioactius</a> d'<a href="/wiki/Urani" title="Urani">urani</a> i <a href="/wiki/Tori" title="Tori">tori</a>. A més, és present en algunes aigües minerals, en gasos volcànics i en certs jaciments de <a href="/wiki/Gas_natural" title="Gas natural">gas natural</a> dels <a href="/wiki/Estats_Units" class="mw-redirect" title="Estats Units">Estats Units</a>, dels quals prové la majoria de l'heli comercial. </p><p>Durant molts anys, els <a href="/wiki/Estats_Units" class="mw-redirect" title="Estats Units">Estats Units</a> han produït al voltant del 90% de l'heli comercial del món, mentre que plantes d'extracció del <a href="/wiki/Canad%C3%A0" title="Canadà">Canadà</a>, <a href="/wiki/Pol%C3%B2nia" title="Polònia">Polònia</a>, <a href="/wiki/R%C3%BAssia" title="Rússia">Rússia</a> i d'altres estats en produïen la resta. A principi de la <a href="/wiki/D%C3%A8cada_del_2000" title="Dècada del 2000">dècada del 2000</a>, <a href="/wiki/Alg%C3%A8ria" title="Algèria">Algèria</a> i <a href="/wiki/Qatar" title="Qatar">Qatar</a> s'afegiren també com a productors d'heli, i es convertí ràpidament Algèria en el segon productor mundial. </p><p>L'heli pot sintetitzar-se bombardejant nuclis de <a href="/wiki/Liti" title="Liti">liti</a> o <a href="/wiki/Bor" title="Bor">bor</a> amb <a href="/wiki/Protons" class="mw-redirect" title="Protons">protons</a> a alta velocitat. </p> <div class="mw-heading mw-heading3"><h3 id="Extracció_i_ús"><span id="Extracci.C3.B3_i_.C3.BAs"></span>Extracció i ús</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Heli&action=edit&section=3" title="Modifica la secció: Extracció i ús"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Després que una operació de perforació de petroli, el 1903 a <a href="/wiki/Dexter_(Kansas)" title="Dexter (Kansas)">Dexter</a> (<a href="/wiki/Kansas" title="Kansas">Kansas</a>), produís un guèiser de gas que no es podia cremar, el geòleg de l'estat de Kansas <a href="/w/index.php?title=Erasmus_Haworth&action=edit&redlink=1" class="new" title="Erasmus Haworth (encara no existeix)">Erasmus Haworth</a> recollí mostres del gas que s'escapava i les dugué a la <a href="/wiki/Universitat_de_Kansas" title="Universitat de Kansas">Universitat de Kansas</a> a Lawrence, on, amb l'ajut dels químics <a href="/w/index.php?title=Hamilton_Cady&action=edit&redlink=1" class="new" title="Hamilton Cady (encara no existeix)">Hamilton Cady</a> i David McFarland, descobrí que, per volum, el gas consistia en un 72% de <a href="/wiki/Nitrogen" title="Nitrogen">nitrogen</a>, un 15% de <a href="/wiki/Met%C3%A0" title="Metà">metà</a> (un percentatge <a href="/wiki/Combustible" title="Combustible">combustible</a> només si hi ha prou oxigen), un 1% d'hidrogen i un 12% d'un gas no identificable.<sup id="cite_ref-nbb_3-3" class="reference"><a href="#cite_note-nbb-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> Després de més anàlisis, Cady i McFarland descobriren que un 1,84% de la mostra del gas era heli.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> Això demostrà que, malgrat la seva raresa en termes generals a la Terra, hi havia heli concentrat en grans quantitats a sota de les <a href="/wiki/Grans_Planes" title="Grans Planes">Grans Planes</a> americanes, disponible per a ser extret com a producte secundari del gas natural.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> Les reserves més importants d'heli es trobaven a <a href="/wiki/Hugoton" title="Hugoton">Hugoton</a> i jaciments de gas propers, al sud-oest de Kansas, i a les <i><a href="/w/index.php?title=Panhandle&action=edit&redlink=1" class="new" title="Panhandle (encara no existeix)">panhandles</a></i> de <a href="/w/index.php?title=Panhandle_de_Texas&action=edit&redlink=1" class="new" title="Panhandle de Texas (encara no existeix)">Texas</a> i <a href="/wiki/Panhandle_d%27Oklahoma" class="mw-redirect" title="Panhandle d'Oklahoma">Oklahoma</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Característiques_principals"><span id="Caracter.C3.ADstiques_principals"></span>Característiques principals</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Heli&action=edit&section=4" title="Modifica la secció: Característiques principals"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Propietats_físiques"><span id="Propietats_f.C3.ADsiques"></span>Propietats físiques</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Heli&action=edit&section=5" title="Modifica la secció: Propietats físiques"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>En <a href="/wiki/Condicions_normals_de_pressi%C3%B3_i_temperatura" title="Condicions normals de pressió i temperatura">condicions normals de pressió i temperatura</a>, l'heli és un <a href="/wiki/Gas" title="Gas">gas</a> monoatòmic, i es pot liquar només en condicions extremes d'alta pressió i baixa temperatura. Té el punt de solidificació més baix de tots els elements químics, i és l'únic líquid que no pot solidificar-se abaixant la temperatura, ja que roman en estat líquid en el <a href="/wiki/Zero_absolut" title="Zero absolut">zero absolut</a> a pressió normal. De fet, la seva <a href="/wiki/Punt_cr%C3%ADtic" title="Punt crític">temperatura crítica</a> és de tan sols 5,19 <a href="/wiki/Kelvin" title="Kelvin">K</a>. Els sòlids ³He i <sup>4</sup>He són els únics en els quals és possible, incrementant la pressió, reduir el volum més del 30%. La calor específica del gas heli és molt elevada i el seu vapor molt dens, i s'expandeix ràpidament quan s'escalfa a temperatura ambient. </p> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:Helium_spectrum.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/80/Helium_spectrum.jpg/220px-Helium_spectrum.jpg" decoding="async" width="220" height="66" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/80/Helium_spectrum.jpg/330px-Helium_spectrum.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/80/Helium_spectrum.jpg/440px-Helium_spectrum.jpg 2x" data-file-width="506" data-file-height="151" /></a><figcaption>Espectre de l'heli</figcaption></figure><p> L'heli sòlid només existix a pressions d'aproximadament 100 M<a href="/wiki/Pascal_(unitat)" title="Pascal (unitat)">Pa</a> a 15 K (–248,15<a href="/wiki/Grau_Celsius" title="Grau Celsius">°C</a>). Aproximadament a aquesta temperatura, l'heli sofreix una transformació cristal·lina, d'<a href="/wiki/Estructura_cristal%C2%B7lina" title="Estructura cristal·lina">estructura cúbica</a> a estructura hexagonal compacta; en condicions més extremes, es produïx un nou canvi, empaquetant-se els àtoms en una estructura cúbica centrada en el cos. Tots aquests empaquetatges tenen energies i densitats semblants, i es deuen els canvis a la forma en què els àtoms interaccionen.</p><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:Helium-II-creep.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Helium-II-creep.svg/220px-Helium-II-creep.svg.png" decoding="async" width="220" height="306" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Helium-II-creep.svg/330px-Helium-II-creep.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Helium-II-creep.svg/440px-Helium-II-creep.svg.png 2x" data-file-width="257" data-file-height="357" /></a><figcaption>Efecte font de l'heli-II</figcaption></figure><p>L'heli líquid (heli-4) es troba en dues formes distintes, heli-4 I i heli-4 II, entre els quals es produïx una brusca transició a 2,1768 K (punt lambda) a la <a href="/wiki/Pressi%C3%B3_de_vapor" title="Pressió de vapor">pressió de vapor</a>. L'He-I, per damunt d'eixa temperatura és un líquid normal, però l'He-II, per davall d'aquesta, no s'assembla a cap altra substància i es converteix en un <a href="/wiki/Superfluid" title="Superfluid">superfluid</a> les inusuals característiques del qual es deuen a <a href="/wiki/Mec%C3%A0nica_qu%C3%A0ntica" title="Mecànica quàntica">efectes quàntics</a>, un dels primers casos en què s'han observat a escala macroscòpica. </p><p>L'heli-II té una <a href="/wiki/Viscositat" title="Viscositat">viscositat</a> nul·la, per la qual cosa fluïx amb facilitat a través de finíssims capil·lars a través dels quals l'heli-I no pot fluir i té, a més, una conductivitat tèrmica molt major que qualsevol altra substància. Exhibix un efecte font, de manera que si se submergix parcialment un tub amb un extrem capil·lar en heli-II i s'escalfa el tub per a superar el punt lambda, l'heli-II s'abocarà per l'extrem lliure del tub a manera de font; produint-se un flux constant d'heli-II a través del capil·lar cap al tub escalfat. </p><p>Inversament, quan es força el pas d'heli-II a través d'un capil·lar, el líquid es refreda. Les pulsacions de calor es propaguen a través del líquid de manera anàloga a com ho fa el so, un fenomen que es denomina, per això, <i>segon so</i>. A més, l'heli-II té la capacitat de reptar, de manera que qualsevol sòlid en contacte amb aquest es cobreix amb una capa d'entre 50 i 100 àtoms de gruix a través de la qual el líquid pot fluir a una velocitat que depèn de la temperatura; de fet, si se submergix parcialment un atuell amb el fons estanc en un llit d'heli-II, aquest reptarà per les parets exteriors de l'atuell omplint-la fins que els nivells en aquests dos s'igualen; aquesta propietat dificulta, per raons òbvies, la construcció de recipients per a l'heli-II. </p> <div class="mw-heading mw-heading3"><h3 id="Propietats_químiques"><span id="Propietats_qu.C3.ADmiques"></span>Propietats químiques</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Heli&action=edit&section=6" title="Modifica la secció: Propietats químiques"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Atès que l'heli és un <a href="/wiki/Gas_noble" title="Gas noble">gas noble</a>, en la pràctica no participa en les <a href="/wiki/Reaccions_qu%C3%ADmiques" class="mw-redirect" title="Reaccions químiques">reaccions químiques</a>, encara que sota la influència de descàrregues elèctriques o bombardejat amb <a href="/wiki/Electrons" class="mw-redirect" title="Electrons">electrons</a> forma compostos amb el <a href="/wiki/Wolframi" class="mw-redirect" title="Wolframi">wolframi</a>, <a href="/wiki/Iode" title="Iode">iode</a>, <a href="/wiki/Fluor" title="Fluor">fluor</a> i <a href="/wiki/F%C3%B2sfor" title="Fòsfor">fòsfor</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Isòtops"><span id="Is.C3.B2tops"></span>Isòtops</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Heli&action=edit&section=7" title="Modifica la secció: Isòtops"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:Helium-3_and_Helium-4.gif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Helium-3_and_Helium-4.gif/220px-Helium-3_and_Helium-4.gif" decoding="async" width="220" height="168" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Helium-3_and_Helium-4.gif/330px-Helium-3_and_Helium-4.gif 1.5x, //upload.wikimedia.org/wikipedia/commons/a/a3/Helium-3_and_Helium-4.gif 2x" data-file-width="410" data-file-height="313" /></a><figcaption>Isòtops naturals de l'heli</figcaption></figure> <p>L'isòtop més comú de l'heli és el <a href="/wiki/Heli-4" class="mw-redirect" title="Heli-4"><sup>4</sup>He</a>, el nucli del qual és constituït per dos <a href="/wiki/Prot%C3%B3" title="Protó">protons</a> i dos <a href="/wiki/Neutrons" class="mw-redirect" title="Neutrons">neutrons</a>. La seva excepcional <a href="/wiki/Estabilitat_nuclear" class="mw-redirect" title="Estabilitat nuclear">estabilitat nuclear</a> es deu al fet que té un <a href="/wiki/Nombre_m%C3%A0gic" class="mw-redirect" title="Nombre màgic">nombre màgic</a> de nucleons, és a dir, una quantitat que es distribuïx en nivells complets (de mode anàleg a com es distribuïxen els <a href="/wiki/Electrons" class="mw-redirect" title="Electrons">electrons</a> en els <a href="/wiki/Orbital_at%C3%B2mic" title="Orbital atòmic">orbitals</a>). </p><p>Nombrosos nuclis pesants es desintegren emetent un nucli de <sup>4</sup>He; aquest procés, que es denomina <i><a href="/wiki/Desintegraci%C3%B3_alfa" class="mw-redirect" title="Desintegració alfa">desintegració alfa</a></i> i pel qual al nucli emès se l'anomena <i><a href="/wiki/Part%C3%ADcula_alfa" class="mw-redirect" title="Partícula alfa">partícula alfa</a></i>, és l'origen de la majoria de l'heli terrestre. Aquest fenomen es representa amb l'equació següent: </p> <center><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 {}_{Z}^{A}{\hbox{X}}\;\to \;{}_{Z-2}^{A-4}{\hbox{Y}}\;+\;{}_{2}^{4}{\hbox{He}}^{2+}\;\to \;_{Z-2}^{A-4}{\hbox{Y}}\;+\;\alpha }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msubsup> <mrow class="MJX-TeXAtom-ORD"> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi>Z</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi>A</mi> </mrow> </msubsup> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="false" scriptlevel="0"> <mtext>X</mtext> </mstyle> </mrow> <mspace width="thickmathspace" /> <mo stretchy="false">→</mo> <mspace width="thickmathspace" /> <msubsup> <mrow class="MJX-TeXAtom-ORD"> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi>Z</mi> <mo>−</mo> <mn>2</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi>A</mi> <mo>−</mo> <mn>4</mn> </mrow> </msubsup> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="false" scriptlevel="0"> <mtext>Y</mtext> </mstyle> </mrow> <mspace width="thickmathspace" /> <mo>+</mo> <mspace width="thickmathspace" /> <msubsup> <mrow class="MJX-TeXAtom-ORD"> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>4</mn> </mrow> </msubsup> <msup> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="false" scriptlevel="0"> <mtext>He</mtext> </mstyle> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> <mo>+</mo> </mrow> </msup> <mspace width="thickmathspace" /> <mo stretchy="false">→</mo> <msubsup> <mspace width="thickmathspace" /> <mrow class="MJX-TeXAtom-ORD"> <mi>Z</mi> <mo>−</mo> <mn>2</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mi>A</mi> <mo>−</mo> <mn>4</mn> </mrow> </msubsup> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="false" scriptlevel="0"> <mtext>Y</mtext> </mstyle> </mrow> <mspace width="thickmathspace" /> <mo>+</mo> <mspace width="thickmathspace" /> <mi>α</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {}_{Z}^{A}{\hbox{X}}\;\to \;{}_{Z-2}^{A-4}{\hbox{Y}}\;+\;{}_{2}^{4}{\hbox{He}}^{2+}\;\to \;_{Z-2}^{A-4}{\hbox{Y}}\;+\;\alpha }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/e5c08835056e49b865ec0d26c4258af8f63e8ec9" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.171ex; width:39.545ex; height:3.509ex;" alt="{\displaystyle {}_{Z}^{A}{\hbox{X}}\;\to \;{}_{Z-2}^{A-4}{\hbox{Y}}\;+\;{}_{2}^{4}{\hbox{He}}^{2+}\;\to \;_{Z-2}^{A-4}{\hbox{Y}}\;+\;\alpha }"></span></center> <p>Amb l'<a href="/wiki/Urani" title="Urani">urani</a>, per exemple: </p> <center><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 {}^{2}{}_{92}^{38}{\hbox{U}}\;\to \;{}^{2}{}_{90}^{34}{\hbox{Th}}\;+\;{}_{2}^{4}{\hbox{He}}^{2+}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msup> <mrow class="MJX-TeXAtom-ORD"> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <msubsup> <mrow class="MJX-TeXAtom-ORD"> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>92</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>38</mn> </mrow> </msubsup> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="false" scriptlevel="0"> <mtext>U</mtext> </mstyle> </mrow> <mspace width="thickmathspace" /> <mo stretchy="false">→</mo> <mspace width="thickmathspace" /> <msup> <mrow class="MJX-TeXAtom-ORD"> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> <msubsup> <mrow class="MJX-TeXAtom-ORD"> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>90</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>34</mn> </mrow> </msubsup> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="false" scriptlevel="0"> <mtext>Th</mtext> </mstyle> </mrow> <mspace width="thickmathspace" /> <mo>+</mo> <mspace width="thickmathspace" /> <msubsup> <mrow class="MJX-TeXAtom-ORD"> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>4</mn> </mrow> </msubsup> <msup> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="false" scriptlevel="0"> <mtext>He</mtext> </mstyle> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> <mo>+</mo> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {}^{2}{}_{92}^{38}{\hbox{U}}\;\to \;{}^{2}{}_{90}^{34}{\hbox{Th}}\;+\;{}_{2}^{4}{\hbox{He}}^{2+}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/fd6eecde0bfd782adedb6a6bf8210199c85645bf" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; width:25.772ex; height:3.343ex;" alt="{\displaystyle {}^{2}{}_{92}^{38}{\hbox{U}}\;\to \;{}^{2}{}_{90}^{34}{\hbox{Th}}\;+\;{}_{2}^{4}{\hbox{He}}^{2+}}"></span></center> <p>L'heli té un segon isòtop, el ³He, així com d'altres més pesants que són <a href="/wiki/Radioactiu" class="mw-redirect" title="Radioactiu">radioactius</a>. L'<a href="/wiki/Heli-3" class="mw-redirect" title="Heli-3">heli-3</a> és pràcticament inexistent en la Terra, ja que la desintegració alfa produïx exclusivament nuclis d'heli-4 i tant aquests com l'heli atmosfèric escapen a l'espai en períodes geològics relativament curts. </p><p>Aquests dos isòtops es van produir en el <a href="/wiki/Big-bang" title="Big-bang">big-bang</a> i quantitats significatives es continuen produint per mitjà de la fusió de l'hidrogen en les <a href="/wiki/Estrella" class="mw-redirect" title="Estrella">estrelles</a> seguint la <a href="/wiki/Cadena_prot%C3%B3-prot%C3%B3" title="Cadena protó-protó">cadena protó-protó</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Aplicacions">Aplicacions</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Heli&action=edit&section=8" title="Modifica la secció: Aplicacions"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:Luftschiff_small.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/50/Luftschiff_small.jpg/220px-Luftschiff_small.jpg" decoding="async" width="220" height="95" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/5/50/Luftschiff_small.jpg 1.5x" data-file-width="320" data-file-height="138" /></a><figcaption>Dirigible ple d'heli</figcaption></figure><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:Laser_DSC09088.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Laser_DSC09088.JPG/220px-Laser_DSC09088.JPG" decoding="async" width="220" height="217" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Laser_DSC09088.JPG/330px-Laser_DSC09088.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Laser_DSC09088.JPG/440px-Laser_DSC09088.JPG 2x" data-file-width="1716" data-file-height="1692" /></a><figcaption>Làser d'heli-neó</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:Modern_3T_MRI.JPG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Modern_3T_MRI.JPG/220px-Modern_3T_MRI.JPG" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Modern_3T_MRI.JPG/330px-Modern_3T_MRI.JPG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bd/Modern_3T_MRI.JPG/440px-Modern_3T_MRI.JPG 2x" data-file-width="1600" data-file-height="1200" /></a><figcaption>Escàner de ressonància magnètica que empra heli en el sistema de refrigeració</figcaption></figure> <p>L'heli és més lleuger que l'<a href="/wiki/Aire" title="Aire">aire</a> i, a diferència de l'<a href="/wiki/Hidrogen" title="Hidrogen">hidrogen</a>, no és inflamable, però el seu poder ascensional és un 8% menor que el d'aquest, per la qual cosa s'empra com a gas de farciment en <a href="/wiki/Globus_aerost%C3%A0tic" title="Globus aerostàtic">globus</a> i <a href="/w/index.php?title=Zeppel%C3%AD&action=edit&redlink=1" class="new" title="Zeppelí (encara no existeix)">zeppelins</a> publicitaris, d'investigació atmosfèrica i, fins i tot, per a reconeixements militars. </p><p>Encara que n'és l'anterior la principal, l'heli té més aplicacions: </p> <ul><li>Les atmosferes <b>heli</b> -<a href="/wiki/Oxigen" title="Oxigen">oxigen</a> s'empren en la immersió a gran profunditat, ja que l'heli és inert, menys soluble en la <a href="/wiki/Sang" title="Sang">sang</a> que el <a href="/wiki/Nitrogen" title="Nitrogen">nitrogen</a> i es difon 2,5 vegades més de pressa que aquest, la qual cosa reduïx el temps requerit per a la descompressió, encara que aquesta ha de començar a major profunditat, i elimina el risc de <a href="/w/index.php?title=Necrosi_per_nitrogen&action=edit&redlink=1" class="new" title="Necrosi per nitrogen (encara no existeix)">necrosi per nitrogen</a> (borratxera de les profunditats).</li> <li>Pel seu baix punt de liqüefacció i evaporació, pot utilitzar-se com a refrigerant en aplicacions a temperatura extremament baixa, com en imants <a href="/wiki/Superconductor" class="mw-redirect" title="Superconductor">superconductors</a> i investigació <a href="/wiki/Criog%C3%A8nia" title="Criogènia">criogènica</a> a temperatures pròximes al zero absolut.</li> <li>En <a href="/wiki/Cromatografia_de_gasos" title="Cromatografia de gasos">cromatografia de gasos</a>, s'usa com a gas portador inert.</li> <li>L'atmosfera inerta d'heli s'empra en la <a href="/wiki/Soldadura_per_arc" title="Soldadura per arc">soldadura per arc</a> i en la fabricació de cristalls de <a href="/wiki/Silici" title="Silici">silici</a> i <a href="/wiki/Germani" title="Germani">germani</a>, així com per a pressuritzar combustibles líquids de <a href="/wiki/Coet" title="Coet">coets</a> .</li> <li>En <a href="/wiki/T%C3%BAnel_de_vent" title="Túnel de vent">túnels de vent</a> <a href="/wiki/Velocitat_del_so" title="Velocitat del so">supersònics</a>.</li> <li>Com a agent refrigerant en <a href="/wiki/Reactor_nuclear" title="Reactor nuclear">reactors nuclears</a>.</li> <li>L'heli líquid troba cada vegada major ús en les aplicacions mèdiques de la imatge per <a href="/wiki/Resson%C3%A0ncia_magn%C3%A8tica" title="Ressonància magnètica">ressonància magnètica</a> (RMI).</li> <li>Juntament amb el neó, s'empra en els anomenats <a href="/wiki/L%C3%A0ser_d%27heli-ne%C3%B3" title="Làser d'heli-neó"><i>làsers d'heli-neó</i></a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Precaucions">Precaucions</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Heli&action=edit&section=9" title="Modifica la secció: Precaucions"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:HeTube.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1f/HeTube.jpg/220px-HeTube.jpg" decoding="async" width="220" height="220" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1f/HeTube.jpg/330px-HeTube.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1f/HeTube.jpg/440px-HeTube.jpg 2x" data-file-width="2000" data-file-height="2000" /></a><figcaption>Tub d'heli</figcaption></figure> <p>La <a href="/wiki/Veu" title="Veu">veu</a> d'una persona que ha inhalat heli sona més aguda del normal de manera temporal, i s'assembla a la d'alguns personatges de dibuixos animats (encara que les veus d'aquests personatges, generalment, es produïen canviant el to de les veus normals). Aquest efecte es produeix perquè la <a href="/wiki/Velocitat_del_so" title="Velocitat del so">velocitat del so</a> en heli és gairebé tres vegades més ràpida que en l'<a href="/wiki/Aire" title="Aire">aire</a>. Com a resultat, quan s'inhala heli, es produeix un augment en les freqüències ressonants del tracte vocal. La tonalitat més alta percebuda és només a causa d'una modulació de freqüències diferent de la veu, ja que la freqüència fonamental de les <a href="/wiki/Cordes_vocals" class="mw-redirect" title="Cordes vocals">cordes vocals</a> resta més o menys inalterada. </p><p>Encara que l'efecte vocal de la inhalació d'heli pot ser divertit, també pot ser perillós si es fa amb excés. La raó no és per la toxicitat o cap propietat de l'heli sinó simplement per la manca de l'oxigen necessari per a la respiració normal. En els mamífers (amb l'excepció notable de les balenes), el reflex de la respiració no és provocat per la manca d'oxigen, sinó per l'excés de <a href="/wiki/Di%C3%B2xid_de_carboni" title="Diòxid de carboni">diòxid de carboni</a>. Per tant, una persona podria no adonar-se de la manca de l'oxigen suficient i produir-se una pèrdua de coneixement, amb danys al cervell i, fins i tot, la mort per asfíxia en casos extrems. També, si l'heli s'inhala directament des de bombones pressuritzades, pot provocar la ruptura de teixit pulmonar per excés de pressió. </p><p>L'heli, en condicions estàndards, no és tòxic, ni té cap rol biològic i es troba a nivell de traça en la sang humana. A pressions altes, una mescla d'heli i oxigen (<a href="/w/index.php?title=Heliox&action=edit&redlink=1" class="new" title="Heliox (encara no existeix)">heliox</a>) pot provocar la <a href="/w/index.php?title=S%C3%ADndrome_nerviosa_per_alta_pressi%C3%B3&action=edit&redlink=1" class="new" title="Síndrome nerviosa per alta pressió (encara no existeix)">síndrome nerviosa per alta pressió</a>. Una petita proporció de nitrogen en la mescla pot alleujar el problema. </p><p>Els dipòsits d'heli gas de 5 a 10 <a href="/wiki/Kelvin" title="Kelvin">K</a> han d'emmagatzemar-se com si continguessin líquid a causa del gran increment de pressió que es produïx en escalfar el gas a temperatura ambient. </p> <div class="mw-heading mw-heading2"><h2 id="Referències"><span id="Refer.C3.A8ncies"></span>Referències</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Heli&action=edit&section=10" title="Modifica la secció: Referències"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="reflist {{#if: | references-column-count references-column-count-{{{col}}}" style="list-style-type: decimal;"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www-d0.fnal.gov/hardware/cal/lvps_info/engineering/elementmagn.pdf">Magnetic susceptibility of the elements and inorganic compounds</a>, al <i>Handbook of Chemistry and Physics</i>, 81a edició, CRC press. </span> </li> <li id="cite_note-frnch-2"><span class="mw-cite-backlink"><a href="#cite_ref-frnch_2-0">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">Kochhar, R. K. «<a rel="nofollow" class="external text" href="http://articles.adsabs.harvard.edu//full/1991JBAA..101...95K/0000100.000.html">French astronomers in India during the 17th - 19th centuries</a>». <i>Journal of the British Astronomical Association</i>, 101, 2, 1991, pàg. 95–100 [Consulta: 27 juliol 2008].</span></span> </li> <li id="cite_note-nbb-3"><span class="mw-cite-backlink">↑ <sup><a href="#cite_ref-nbb_3-0">3,0</a></sup> <sup><a href="#cite_ref-nbb_3-1">3,1</a></sup> <sup><a href="#cite_ref-nbb_3-2">3,2</a></sup> <sup><a href="#cite_ref-nbb_3-3">3,3</a></sup></span> <span class="reference-text"><span class="citation book" style="font-style:normal">Emsley, John. <i>Nature's Building Blocks</i>.  Oxford: Oxford University Press, 2001, p. 175–179. <span style="font-size:90%; white-space:nowrap;"><a href="/wiki/Especial:Fonts_bibliogr%C3%A0fiques/0-19-850341-5" title="Especial:Fonts bibliogràfiques/0-19-850341-5">ISBN 0-19-850341-5</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Nature%27s+Building+Blocks&rft.au=Emsley%2C+John&rft.date=2001&rft.pub=Oxford+University+Press&rft.place=Oxford&rft.pages=175%E2%80%93179&rft.isbn=0-19-850341-5"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text"><i>The Encyclopedia of the Chemical Elements</i>, p. 256</span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">«<a rel="nofollow" class="external text" href="http://dictionary.oed.com/cgi/entry/50104457?">Helium</a>».  Oxford English Dictionary, 2008. [Consulta: 20 juliol 2008].</span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><a href="#cite_ref-6">↑</a></span> <span class="reference-text"><span class="citation book" style="font-style:normal">Thomson, W.. <i>Frankland and Lockyer find the yellow prominences to give a very decided bright line not far from D, but hitherto not identified with any terrestrial flame. It seems to indicate a new substance, which they propose to call Helium.</i>.  Rep. Brit. Assoc. xcix, 1872.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Frankland+and+Lockyer+find+the+yellow+prominences+to+give+a+very+decided+bright+line+not+far+from+D%2C+but+hitherto+not+identified+with+any+terrestrial+flame.+It+seems+to+indicate+a+new+substance%2C+which+they+propose+to+call+Helium.&rft.au=Thomson%2C+W.&rft.date=1872&rft.pub=Rep.+Brit.+Assoc.+xcix"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-Encyc_257-7"><span class="mw-cite-backlink"><a href="#cite_ref-Encyc_257_7-0">↑</a></span> <span class="reference-text"><i>The Encyclopedia of the Chemical Elements</i>, p. 257</span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><a href="#cite_ref-8">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal"><a href="/wiki/William_Ramsay" title="William Ramsay">Ramsay, William</a> «On a Gas Showing the Spectrum of Helium, the Reputed Cause of D3, One of the Lines in the Coronal Spectrum. Preliminary Note». <i>Proceedings of the Royal Society of London</i>, 58, 1895, pàg. 65–67. <a href="/wiki/DOI" title="DOI">DOI</a>: <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1098%2Frspl.1895.0006">10.1098/rspl.1895.0006</a>.</span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><a href="#cite_ref-9">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">Ramsay, William «Helium, a Gaseous Constituent of Certain Minerals. Part I». <i>Proceedings of the Royal Society of London</i>, 58, 1895, pàg. 80–89. <a href="/wiki/DOI" title="DOI">DOI</a>: <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1098%2Frspl.1895.0010">10.1098/rspl.1895.0010</a>.</span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><a href="#cite_ref-10">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">Ramsay, William «Helium, a Gaseous Constituent of Certain Minerals. Part II--». <i>Proceedings of the Royal Society of London</i>, 59, 1895, pàg. 325–330. <a href="/wiki/DOI" title="DOI">DOI</a>: <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1098%2Frspl.1895.0097">10.1098/rspl.1895.0097</a>.</span></span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><a href="#cite_ref-11">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">Langlet, N. A. «Das Atomgewicht des Heliums» (en alemany). <i>Zeitschrift für anorganische Chemie</i>, 10, 1, 1895, pàg. 289–292. <a href="/wiki/DOI" title="DOI">DOI</a>: <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1002%2Fzaac.18950100130">10.1002/zaac.18950100130</a>.</span></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><a href="#cite_ref-12">↑</a></span> <span class="reference-text"><span class="citation book" style="font-style:normal">Weaver, E.R.. «Bibliography of Helium Literature». A: <i>Industrial & Engineering Chemistry</i>, 1919.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Industrial+%26+Engineering+Chemistry&rft.atitle=Bibliography+of+Helium+Literature&rft.au=Weaver%2C+E.R.&rft.date=1919"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><a href="#cite_ref-13">↑</a></span> <span class="reference-text"><span class="citation book" style="font-style:normal"><a href="/w/index.php?title=Pat_Munday&action=edit&redlink=1" class="new" title="Pat Munday (encara no existeix)">Munday, Pat</a>. John A. Garraty and Mark C. Carnes. <i>Biographical entry for W.F. Hillebrand (1853–1925), geochemist and US Bureau of Standards administrator in <a href="/w/index.php?title=American_National_Biography&action=edit&redlink=1" class="new" title="American National Biography (encara no existeix)">American National Biography</a></i>. 10-11.  Oxford University Press, 1999, p. 808–9; p. 227–8.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Biographical+entry+for+W.F.+Hillebrand+%281853%E2%80%931925%29%2C+geochemist+and+US+Bureau+of+Standards+administrator+in+%5B%5BAmerican+National+Biography%5D%5D&rft.au=%5B%5BPat+Munday%7CMunday%2C+Pat%5D%5D&rft.date=1999&rft.pub=Oxford+University+Press&rft.pages=808%E2%80%939%3B+p.+227%E2%80%938"><span style="display: none;"> </span></span></span> </li> <li id="cite_note-14"><span class="mw-cite-backlink"><a href="#cite_ref-14">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">van Delft, Dirk «<a rel="nofollow" class="external text" href="https://web.archive.org/web/20080625064354/http://www-lorentz.leidenuniv.nl/history/cold/VanDelftHKO_PT.pdf">Little cup of Helium, big Science</a>» (PDF). <i>Physics today</i>, 2008, pàg. 36–42. Arxivat de l'<a rel="nofollow" class="external text" href="http://www-lorentz.leidenuniv.nl/history/cold/VanDelftHKO_PT.pdf">original</a> el 2008-06-25 [Consulta: 20 juliol 2008].</span> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20080625064354/http://www-lorentz.leidenuniv.nl/history/cold/VanDelftHKO_PT.pdf">Arxivat</a> 2008-06-25 a <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a>.</span> </li> <li id="cite_note-15"><span class="mw-cite-backlink"><a href="#cite_ref-15">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal"> «<a rel="nofollow" class="external text" href="http://www.time.com/time/magazine/article/0,9171,751945,00.html">Coldest Cold</a>». <i>Time Inc.</i>, 10-06-1929 [Consulta: 27 juliol 2008].</span> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20130721134040/http://www.time.com/time/magazine/article/0,9171,751945,00.html">Arxivat</a> 2013-07-21 a <a href="/wiki/Wayback_Machine" title="Wayback Machine">Wayback Machine</a>. <span class="citation" style="font-style:normal">«<a rel="nofollow" class="external text" href="https://web.archive.org/web/20130721134040/http://www.time.com/time/magazine/article/0,9171,751945,00.html">Còpia arxivada</a>». Arxivat de l'<a rel="nofollow" class="external text" href="http://www.time.com/time/magazine/article/0,9171,751945,00.html">original</a> el 2013-07-21. [Consulta: 13 juny 2009].</span></span> </li> <li id="cite_note-16"><span class="mw-cite-backlink"><a href="#cite_ref-16">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal"><a href="/wiki/Piotr_Leon%C3%ADdovitx_Kapitsa" title="Piotr Leonídovitx Kapitsa">Kapitsa, P.</a> «Viscosity of Liquid Helium below the λ-Point». <i><a href="/wiki/Nature" title="Nature">Nature</a></i>, 141, 1938, pàg. 74. <a href="/wiki/DOI" title="DOI">DOI</a>: <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1038%2F141074a0">10.1038/141074a0</a>.</span></span> </li> <li id="cite_note-17"><span class="mw-cite-backlink"><a href="#cite_ref-17">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">Osheroff, D. D.; R. C. Richardson, D. M. Lee «Evidence for a New Phase of Solid He³». <i>Phys. Rev. Lett.</i>, 28, 14, 1972, pàg. 885–888. <a href="/wiki/DOI" title="DOI">DOI</a>: <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1103%2FPhysRevLett.28.885">10.1103/PhysRevLett.28.885</a>.</span></span> </li> <li id="cite_note-18"><span class="mw-cite-backlink"><a href="#cite_ref-18">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">McFarland, D. F. «<a rel="nofollow" class="external text" href="http://www.jstor.org/stable/3624173">Composition of Gas from a Well at Dexter, Kan</a>». <i>Transactions of the Kansas Academy of Science</i>, 19, 1903, pàg. 60–62. <a href="/wiki/DOI" title="DOI">DOI</a>: <a rel="nofollow" class="external text" href="https://dx.doi.org/10.2307%2F3624173">10.2307/3624173</a> [Consulta: 22 juliol 2008].</span></span> </li> <li id="cite_note-19"><span class="mw-cite-backlink"><a href="#cite_ref-19">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">«<a rel="nofollow" class="external text" href="https://web.archive.org/web/20060520213956/http://acswebcontent.acs.org/landmarks/landmarks/helium/helium.html">The Discovery of Helium in Natural Gas</a>».  <a href="/wiki/Societat_Qu%C3%ADmica_Americana" title="Societat Química Americana">Societat Química Americana</a>, 2004. Arxivat de l'<a rel="nofollow" class="external text" href="http://acswebcontent.acs.org/landmarks/landmarks/helium/helium.html">original</a> el 2006-05-20. [Consulta: 20 juliol 2008].</span></span> </li> <li id="cite_note-20"><span class="mw-cite-backlink"><a href="#cite_ref-20">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">Cady, H.P.; D. F. McFarland «Helium in Natural Gas». <i>Science</i>, 24, 1906, pàg. 344. <a href="/wiki/DOI" title="DOI">DOI</a>: <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1126%2Fscience.24.611.344">10.1126/science.24.611.344</a>. <a href="/wiki/PubMed" title="PubMed">PMID</a>: <a href="https://www.ncbi.nlm.nih.gov/pubmed/17772798?dopt=Abstract" class="extiw" title="pmid:17772798">17772798</a>.</span></span> </li> <li id="cite_note-21"><span class="mw-cite-backlink"><a href="#cite_ref-21">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">Cady, H.P.; D. F. McFarland «<a rel="nofollow" class="external text" href="https://archive.today/20120527005227/http://mc1litvip.jstor.org/stable/3624645">Helium in Kansas Natural Gas</a>». <i>Transactions of the Kansas Academy of Science</i>, 20, 1906, pàg. 80–81. Arxivat de l'<a rel="nofollow" class="external text" href="http://mc1litvip.jstor.org/stable/3624645">original</a> el 2012-05-27. <a href="/wiki/DOI" title="DOI">DOI</a>: <a rel="nofollow" class="external text" href="https://dx.doi.org/10.2307%2F3624645">10.2307/3624645</a> [Consulta: 20 juliol 2008].</span> <a rel="nofollow" class="external text" href="https://archive.today/20120527005227/http://mc1litvip.jstor.org/stable/3624645">Arxivat</a> 2012-05-27 at <a href="/wiki/Archive.is" class="mw-redirect" title="Archive.is">Archive.is</a></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Bibliografia">Bibliografia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Heli&action=edit&section=11" title="Modifica la secció: Bibliografia"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="references-small"> <ul><li><span class="citation book" style="font-style:normal">Brandt, L. W.. «Helium». A: Hampel, Clifford A.. <i>The Encyclopedia of the Chemical Elements</i>.  Nova York: Reinhold, 1968, p. 261. <span style="font-size:90%;"><a href="/wiki/OCLC" class="mw-redirect" title="OCLC">OCLC</a> <a rel="nofollow" class="external text" href="http://worldcat.org/oclc/449569">449569</a></span>. <span style="font-size:90%;"><a href="/wiki/Nombre_de_Control_de_la_Biblioteca_del_Congr%C3%A9s" class="mw-redirect" title="Nombre de Control de la Biblioteca del Congrés">LCCN</a> <a rel="nofollow" class="external text" href="http://lccn.loc.gov/Library">of Congress Catalog Card Number: 68-29938 Library of Congress Catalog Card Number: 68-29938</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+Encyclopedia+of+the+Chemical+Elements&rft.atitle=Helium&rft.au=Brandt%2C+L.+W.&rft.date=1968&rft.pub=Reinhold&rft.place=Nova+York&rft.pages=261&rft_id=info:oclcnum/449569"><span style="display: none;"> </span></span></li> <li><span class="citation book" style="font-style:normal">Bureau of Mines. <i>Minerals yearbook mineral fuels Year 1965, Volume II (1967)</i>.  U. S. Government Printing Office, 1967.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Minerals+yearbook+mineral+fuels+Year+1965%2C+Volume+II+%281967%29&rft.au=Bureau+of+Mines&rft.date=1967&rft.pub=U.+S.+Government+Printing+Office"><span style="display: none;"> </span></span></li> <li><span class="citation" style="font-style:normal">«<a rel="nofollow" class="external text" href="https://web.archive.org/web/20110202125304/http://chartofthenuclides.com/default.html">Chart of the Nuclides: Fourteenth Edition</a>».  General Electric Company, 1989. Arxivat de l'<a rel="nofollow" class="external text" href="http://chartofthenuclides.com/default.html">original</a> el 2011-02-02. [Consulta: 12 juny 2009].</span></li> <li><span class="citation book" style="font-style:normal">Emsley, John. <i>The Elements</i>. 3a edició.  Nova York: Oxford University Press, 1998. <span style="font-size:90%; white-space:nowrap;"><a href="/wiki/Especial:Fonts_bibliogr%C3%A0fiques/978-0198558187" title="Especial:Fonts bibliogràfiques/978-0198558187">ISBN 978-0198558187</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+Elements&rft.au=Emsley%2C+John&rft.date=1998&rft.edition=3a%C2%A0edici%C3%B3&rft.pub=Oxford+University+Press&rft.place=Nova+York&rft.isbn=978-0198558187"><span style="display: none;"> </span></span></li> <li><span class="citation" style="font-style:normal">«<a rel="nofollow" class="external text" href="https://minerals.usgs.gov/minerals/pubs/commodity/helium/heliumcs07.pdf">Mineral Information for Helium</a>» (PDF).  United States Geological Survey (usgs.gov). [Consulta: 5 gener 2007].</span></li> <li><span class="citation" style="font-style:normal">Vercheval, J. «<a rel="nofollow" class="external text" href="https://web.archive.org/web/20050101090349/http://www.oma.be/BIRA-IASB/Public/Research/Thermo/Thermotxt.en.html">The thermosphere: a part of the heterosphere</a>».  Belgian Institute for Space Aeronomy, Gener 2003. Arxivat de l'<a rel="nofollow" class="external text" href="http://www.oma.be/BIRA-IASB/Public/Research/Thermo/Thermotxt.en.html">original</a> el 2005-01-01. [Consulta: 12 juliol 2008].</span></li> <li><span class="citation" style="font-style:normal">Zastenker, G. N.; E. Salerno, F. Buehler, P. Bochsler, M. Bassi, Y. N. Agafonov, N. A. Eismont, V. V. Khrapchenkov, H. Busemann «<a rel="nofollow" class="external text" href="http://www.ingentaconnect.com/content/klu/asys/2002/00000045/00000002/00378626">Isotopic Composition and Abundance of Interstellar Neutral Helium Based on Direct Measurements</a>». <i>Astrophysics</i>, 45, 2, Abril 2002, pàg. 131–142. <a href="/wiki/DOI" title="DOI">DOI</a>: <a rel="nofollow" class="external text" href="https://dx.doi.org/10.1023%2FA%3A1016057812964">10.1023/A:1016057812964</a>.</span></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="Vegeu_també"><span id="Vegeu_tamb.C3.A9"></span>Vegeu també</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Heli&action=edit&section=12" title="Modifica la secció: Vegeu també"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Luigi_Palmieri" title="Luigi Palmieri">Luigi Palmieri</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Enllaços_externs"><span id="Enlla.C3.A7os_externs"></span>Enllaços externs</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Heli&action=edit&section=13" title="Modifica la secció: Enllaços externs"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <table cellpadding="2" cellspacing="0" align="right" style="margin:5px; padding: 5px; border:1px solid #aaaaaa; text-align:left;" class="infobox noprint plainlinks"> <tbody><tr> <td colspan="2" style="text-align:center; font-size:85%">En altres projectes de <a href="/wiki/Fundaci%C3%B3_Wikimedia" title="Fundació Wikimedia">Wikimedia</a>: </td></tr> <tr> <td><figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/Fitxer:Commons-logo.svg" class="mw-file-description" title="Commons"><img alt="Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/17px-Commons-logo.svg.png" decoding="async" width="17" height="23" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/26px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/34px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a><figcaption>Commons</figcaption></figure></td> <td><a href="https://commons.wikimedia.org/wiki/Helium" class="extiw" title="commons:Helium"><b>Commons</b></a><span style="font-size:70%;"> (Galeria)</span> <span class="penicon"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q560?uselang=ca#sitelinks-special" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span> </td></tr> <tr> <td><figure class="mw-halign-center" typeof="mw:File"><a href="/wiki/Fitxer:Commons-logo.svg" class="mw-file-description" title="Commons"><img alt="Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/17px-Commons-logo.svg.png" decoding="async" width="17" height="23" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/26px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/34px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a><figcaption>Commons</figcaption></figure></td> <td><a href="https://commons.wikimedia.org/wiki/Category:Helium" class="extiw" title="commons:Category:Helium"><b>Commons</b></a><span style="font-size:70%;"> (Categoria)</span> <span class="penicon"><span class="mw-valign-baseline" typeof="mw:File"><a href="https://www.wikidata.org/wiki/Q560?uselang=ca#sitelinks-special" title="Modifica el valor a Wikidata"><img alt="Modifica el valor a Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/10px-Arbcom_ru_editing.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/15px-Arbcom_ru_editing.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/63/Arbcom_ru_editing.svg/20px-Arbcom_ru_editing.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></span> </td></tr> </tbody></table> <ul><li><a rel="nofollow" class="external text" href="https://uk.youtube.com/watch?v=a8FJEiI5e6Q">La taula periòdica de vídeos - heli</a> <style data-mw-deduplicate="TemplateStyles:r33711417">.mw-parser-output .languageicon{font-size:0.95em;color:#555;background-color:inherit}@media screen{html.skin-theme-clientpref-night .mw-parser-output .languageicon{background-color:inherit;color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .languageicon{background-color:inherit;color:white}}</style><span class="languageicon" title="En anglès">(anglès)</span>.</li> <li><a rel="nofollow" class="external text" href="https://minerals.usgs.gov/minerals/pubs/commodity/helium/">Publicacions sobre l'heli del Servei Geològic dels EUA</a>, des del 1996 <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r33711417"><span class="languageicon" title="En anglès">(anglès)</span>.</li> <li><a rel="nofollow" class="external text" href="http://education.jlab.org/itselemental/ele002.html">It's Elemental – Heli</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r33711417"><span class="languageicon" title="En anglès">(anglès)</span>.</li></ul> <p><br /> </p> <table class="navbox collapsible"> <tbody><tr> <th colspan="32"><a href="/wiki/Taula_peri%C3%B2dica" title="Taula periòdica">Taula periòdica</a> </th></tr> <tr> <td width="3.125%" style="background-color:#a0ffa0"><a href="/wiki/Hidrogen" title="Hidrogen">H</a> </td> <td width="3.125%" colspan="30">  </td> <td width="3.125%" style="background-color:#c0ffff"><a class="mw-selflink selflink">He</a> </td></tr> <tr> <td style="background-color:#ff6666"><a href="/wiki/Liti" title="Liti">Li</a> </td> <td style="background-color:#ffdead"><a href="/wiki/Beril%C2%B7li" title="Beril·li">Be</a> </td> <td colspan="24">  </td> <td style="background-color:#cccc99"><a href="/wiki/Bor" title="Bor">B</a> </td> <td style="background-color:#a0ffa0"><a href="/wiki/Carboni" title="Carboni">C</a> </td> <td style="background-color:#a0ffa0"><a href="/wiki/Nitrogen" title="Nitrogen">N</a> </td> <td style="background-color:#a0ffa0"><a href="/wiki/Oxigen" title="Oxigen">O</a> </td> <td style="background-color:#ffff99"><a href="/wiki/Fluor" title="Fluor">F</a> </td> <td style="background-color:#c0ffff"><a href="/wiki/Ne%C3%B3" title="Neó">Ne</a> </td></tr> <tr> <td style="background-color:#ff6666"><a href="/wiki/Sodi" title="Sodi">Na</a> </td> <td style="background-color:#ffdead"><a href="/wiki/Magnesi" title="Magnesi">Mg</a> </td> <td colspan="24">  </td> <td style="background-color:#cccccc"><a href="/wiki/Alumini" title="Alumini">Al</a> </td> <td style="background-color:#cccc99"><a href="/wiki/Silici" title="Silici">Si</a> </td> <td style="background-color:#a0ffa0"><a href="/wiki/F%C3%B2sfor" title="Fòsfor">P</a> </td> <td style="background-color:#a0ffa0"><a href="/wiki/Sofre" title="Sofre">S</a> </td> <td style="background-color:#ffff99"><a href="/wiki/Clor" title="Clor">Cl</a> </td> <td style="background-color:#c0ffff"><a href="/wiki/Arg%C3%B3" title="Argó">Ar</a> </td></tr> <tr> <td style="background-color:#ff6666"><a href="/wiki/Potassi" title="Potassi">K</a> </td> <td style="background-color:#ffdead"><a href="/wiki/Calci" title="Calci">Ca</a> </td> <td colspan="14">  </td> <td style="background-color:#ffc0c0"><a href="/wiki/Escandi" title="Escandi">Sc</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Titani" title="Titani">Ti</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Vanadi" title="Vanadi">V</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Crom" title="Crom">Cr</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Mangan%C3%A8s" title="Manganès">Mn</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Ferro" title="Ferro">Fe</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Cobalt" title="Cobalt">Co</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/N%C3%ADquel" title="Níquel">Ni</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Coure" title="Coure">Cu</a> </td> <td style="background-color:#cccccc"><a href="/wiki/Zinc" title="Zinc">Zn</a> </td> <td style="background-color:#cccccc"><a href="/wiki/Gal%C2%B7li" title="Gal·li">Ga</a> </td> <td style="background-color:#cccc99"><a href="/wiki/Germani" title="Germani">Ge</a> </td> <td style="background-color:#cccc99"><a href="/wiki/Ars%C3%A8nic" title="Arsènic">As</a> </td> <td style="background-color:#a0ffa0"><a href="/wiki/Seleni" title="Seleni">Se</a> </td> <td style="background-color:#ffff99"><a href="/wiki/Brom" title="Brom">Br</a> </td> <td style="background-color:#c0ffff"><a href="/wiki/Cript%C3%B3" title="Criptó">Kr</a> </td></tr> <tr> <td style="background-color:#ff6666"><a href="/wiki/Rubidi" title="Rubidi">Rb</a> </td> <td style="background-color:#ffdead"><a href="/wiki/Estronci" title="Estronci">Sr</a> </td> <td colspan="14">  </td> <td style="background-color:#ffc0c0"><a href="/wiki/Itri" title="Itri">Y</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Zirconi" title="Zirconi">Zr</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Niobi" title="Niobi">Nb</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Molibd%C3%A8" title="Molibdè">Mo</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Tecneci" title="Tecneci">Tc</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Ruteni" title="Ruteni">Ru</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Rodi" title="Rodi">Rh</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Pal%C2%B7ladi_(element)" title="Pal·ladi (element)">Pd</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Argent_(element)" class="mw-redirect" title="Argent (element)">Ag</a> </td> <td style="background-color:#cccccc"><a href="/wiki/Cadmi" title="Cadmi">Cd</a> </td> <td style="background-color:#cccccc"><a href="/wiki/Indi_(element)" title="Indi (element)">In</a> </td> <td style="background-color:#cccccc"><a href="/wiki/Estany_(element)" title="Estany (element)">Sn</a> </td> <td style="background-color:#cccc99"><a href="/wiki/Antimoni" title="Antimoni">Sb</a> </td> <td style="background-color:#cccc99"><a href="/wiki/Tel%C2%B7luri" title="Tel·luri">Te</a> </td> <td style="background-color:#ffff99"><a href="/wiki/Iode" title="Iode">I</a> </td> <td style="background-color:#c0ffff"><a href="/wiki/Xen%C3%B3" title="Xenó">Xe</a> </td></tr> <tr> <td width="3.125%" style="background-color:#ff6666"><a href="/wiki/Cesi" title="Cesi">Cs</a> </td> <td width="3.125%" style="background-color:#ffdead"><a href="/wiki/Bari_(element)" title="Bari (element)">Ba</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Lantani" title="Lantani">La</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Ceri" title="Ceri">Ce</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Praseodimi" title="Praseodimi">Pr</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Neodimi" title="Neodimi">Nd</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Prometi" title="Prometi">Pm</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Samari" title="Samari">Sm</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Europi" title="Europi">Eu</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Gadolini" title="Gadolini">Gd</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Terbi" title="Terbi">Tb</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Disprosi" title="Disprosi">Dy</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Holmi" title="Holmi">Ho</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Erbi" title="Erbi">Er</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Tuli" title="Tuli">Tm</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Iterbi" title="Iterbi">Yb</a> </td> <td width="3.125%" style="background-color:#ffbfff"><a href="/wiki/Luteci" title="Luteci">Lu</a> </td> <td width="3.125%" style="background-color:#ffc0c0"><a href="/wiki/Hafni" title="Hafni">Hf</a> </td> <td width="3.125%" style="background-color:#ffc0c0"><a href="/wiki/T%C3%A0ntal" title="Tàntal">Ta</a> </td> <td width="3.125%" style="background-color:#ffc0c0"><a href="/wiki/Tungst%C3%A8" title="Tungstè">W</a> </td> <td width="3.125%" style="background-color:#ffc0c0"><a href="/wiki/Reni" title="Reni">Re</a> </td> <td width="3.125%" style="background-color:#ffc0c0"><a href="/wiki/Osmi" title="Osmi">Os</a> </td> <td width="3.125%" style="background-color:#ffc0c0"><a href="/wiki/Iridi" title="Iridi">Ir</a> </td> <td width="3.125%" style="background-color:#ffc0c0"><a href="/wiki/Plat%C3%AD" title="Platí">Pt</a> </td> <td width="3.125%" style="background-color:#ffc0c0"><a href="/wiki/Or" title="Or">Au</a> </td> <td width="3.125%" style="background-color:#cccccc"><a href="/wiki/Mercuri_(element)" title="Mercuri (element)">Hg</a> </td> <td width="3.125%" style="background-color:#cccccc"><a href="/wiki/Tal%C2%B7li" title="Tal·li">Tl</a> </td> <td width="3.125%" style="background-color:#cccccc"><a href="/wiki/Plom" title="Plom">Pb</a> </td> <td width="3.125%" style="background-color:#cccccc"><a href="/wiki/Bismut" title="Bismut">Bi</a> </td> <td width="3.125%" style="background-color:#cccccc"><a href="/wiki/Poloni" title="Poloni">Po</a> </td> <td width="3.125%" style="background-color:#cccc99"><a href="/wiki/%C3%80stat" title="Àstat">At</a> </td> <td width="3.125%" style="background-color:#c0ffff"><a href="/wiki/Rad%C3%B3" title="Radó">Rn</a> </td></tr> <tr> <td style="background-color:#ff6666"><a href="/wiki/Franci" title="Franci">Fr</a> </td> <td style="background-color:#ffdead"><a href="/wiki/Radi_(element)" title="Radi (element)">Ra</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Actini" title="Actini">Ac</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Tori" title="Tori">Th</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Protoactini" title="Protoactini">Pa</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Urani" title="Urani">U</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Neptuni" title="Neptuni">Np</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Plutoni" title="Plutoni">Pu</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Americi" title="Americi">Am</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Curi" title="Curi">Cm</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Berkeli" title="Berkeli">Bk</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Californi" title="Californi">Cf</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Einsteini" title="Einsteini">Es</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Fermi_(element)" title="Fermi (element)">Fm</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Mendelevi" title="Mendelevi">Md</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Nobeli" title="Nobeli">No</a> </td> <td style="background-color:#ff99cc"><a href="/wiki/Lawrenci" title="Lawrenci">Lr</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Rutherfordi" title="Rutherfordi">Rf</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Dubni" title="Dubni">Db</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Seaborgi" title="Seaborgi">Sg</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Bohri" title="Bohri">Bh</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Hassi" title="Hassi">Hs</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Meitneri" title="Meitneri">Mt</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Darmstadti" title="Darmstadti">Ds</a> </td> <td style="background-color:#ffc0c0"><a href="/wiki/Roentgeni" title="Roentgeni">Rg</a> </td> <td style="background-color:#cccccc"><a href="/wiki/Copernici" title="Copernici">Cn</a> </td> <td style="background-color:#cccccc"><a href="/wiki/Nihoni" title="Nihoni">Nh</a> </td> <td style="background-color:#cccccc"><a href="/wiki/Flerovi" title="Flerovi">Fl</a> </td> <td style="background-color:#cccccc"><a href="/wiki/Moscovi" title="Moscovi">Mc</a> </td> <td style="background-color:#cccccc"><a href="/wiki/Livermori" title="Livermori">Lv</a> </td> <td style="background-color:#cccccc"><a href="/wiki/Tennes" title="Tennes">Ts</a> </td> <td style="background-color:#cccccc"><a href="/wiki/Oganess%C3%B3" title="Oganessó">Og</a> </td></tr> <tr> <td colspan="32"> <table border="1" align="center" style="border:1px solid #ffffff; border-collapse:collapse; font-size: smaller; width:100%" rules="all" cellpadding="1"> <tbody><tr> <td style="background-color:#ff6666" width="10%"><a href="/wiki/Metall_alcal%C3%AD" title="Metall alcalí">Metalls alcalins</a> </td> <td style="background-color:#ffdead" width="10%"><a href="/wiki/Alcalinoterris" class="mw-redirect" title="Alcalinoterris">Alcalinoterris</a> </td> <td style="background-color:#ffbfff" width="10%"><a href="/wiki/Lantanoide" title="Lantanoide">Lantanoides</a> </td> <td style="background-color:#ff99cc" width="10%"><a href="/wiki/Actinoide" title="Actinoide">Actinoides</a> </td> <td style="background-color:#ffc0c0" width="10%"><a href="/wiki/Metall_de_transici%C3%B3" title="Metall de transició">Metalls de transició</a> </td> <td style="background-color:#cccccc" width="10%">Altres <a href="/wiki/Metalls" class="mw-redirect" title="Metalls">metalls</a> </td> <td style="background-color:#cccc99" width="10%"><a href="/wiki/Semimetall" title="Semimetall">Semimetalls</a> </td> <td style="background-color:#ffff99" width="10%"><a href="/wiki/Halogen" title="Halogen">No-metalls - Halògens</a> </td> <td style="background-color:#c0ffff" width="10%"><a 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