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<!DOCTYPE html> <html class="client-nojs" lang="nl" dir="ltr"> <head> <meta charset="UTF-8"/> <title>Nobelium - Wikikids</title> <script>document.documentElement.className="client-js";RLCONF={"wgBreakFrames":!1,"wgSeparatorTransformTable":[",\t.",".\t,"],"wgDigitTransformTable":["",""],"wgDefaultDateFormat":"dmy","wgMonthNames":["","januari","februari","maart","april","mei","juni","juli","augustus","september","oktober","november","december"],"wgRequestId":"c66454ae14d398a0eef04a0e","wgCSPNonce":!1,"wgCanonicalNamespace":"","wgCanonicalSpecialPageName":!1,"wgNamespaceNumber":0,"wgPageName":"Nobelium","wgTitle":"Nobelium","wgCurRevisionId":753397,"wgRevisionId":753397,"wgArticleId":138545,"wgIsArticle":!0,"wgIsRedirect":!1,"wgAction":"view","wgUserName":null,"wgUserGroups":["*"],"wgCategories":["Chemische elementen","Scheikunde"],"wgPageContentLanguage":"nl","wgPageContentModel":"wikitext","wgRelevantPageName":"Nobelium","wgRelevantArticleId":138545,"wgIsProbablyEditable":!1,"wgRelevantPageIsProbablyEditable":!1,"wgRestrictionEdit":[],"wgRestrictionMove":[],"wgVisualEditor":{"pageLanguageCode":"nl", "pageLanguageDir":"ltr","pageVariantFallbacks":"nl"},"wgEditSubmitButtonLabelPublish":!1};RLSTATE={"site.styles":"ready","noscript":"ready","user.styles":"ready","user":"ready","user.options":"loading","skins.vector.styles.legacy":"ready","mediawiki.toc.styles":"ready","ext.visualEditor.desktopArticleTarget.noscript":"ready"};RLPAGEMODULES=["site","mediawiki.page.startup","mediawiki.page.ready","mediawiki.toc","skins.vector.legacy.js","ext.gadget.EditCount2","ext.visualEditor.desktopArticleTarget.init","ext.visualEditor.targetLoader"];</script> <script>(RLQ=window.RLQ||[]).push(function(){mw.loader.implement("user.options@1hzgi",function($,jQuery,require,module){/*@nomin*/mw.user.tokens.set({"patrolToken":"+\\","watchToken":"+\\","csrfToken":"+\\"});mw.user.options.set({"variant":"nl"}); 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margin: 0 0 .7em .7em; width: 260px; border: 2px solid #e3e3e3; border-collapse: separate; -moz-border-radius: 1.5em; -webkit-border-radius: 1.5em; border-radius: 1.5em; font-size: 11px; background: transparent; line-height:1.5;"> <tbody><tr> <td colspan="2" height="20px" style="font-size: 10pt; font-weight: bold; text-align: center; background: #e3e3e3; -moz-border-radius: 1em 1em 0 0; -webkit-border-radius: 1em 1em 0 0; border-radius: 1em 1em 0 0;">Chemisch element </td></tr> <tr> <td colspan="2" align="center" style="padding: 4px;"><a href="/Bestand:Nobelium.svg" class="image"><img alt="Nobelium.svg" src="https://upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Nobelium.svg/langnl-250px-Nobelium.svg.png" decoding="async" width="250" height="353" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Nobelium.svg/langnl-375px-Nobelium.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/7/7f/Nobelium.svg/langnl-500px-Nobelium.svg.png 2x" /></a> </td></tr> <tr> <td colspan="2" style="font-size: 10px; font-style: italic; text-align: center;">Symbool Nobelium </td></tr> <tr> <td><b>Naam</b> </td> <td>Nobelium </td></tr> <tr style="display: none;"> <td><b>Latijn</b> </td> <td> </td></tr> <tr> <td><b>Symbool</b> </td> <td>No </td></tr> <tr> <td><b>Atoomnummer</b> </td> <td>102 </td></tr> <tr style="display: none;"> <td><b>Soort</b> </td> <td> </td></tr> <tr> <td><b>Kleur</b> </td> <td>? </td></tr> <tr> <td><b>Smeltpunt</b> </td> <td>827 <a href="/Celsius" class="mw-redirect" title="Celsius"><sup>o</sup>C</a> </td></tr> <tr> <td><b>Kookpunt</b> </td> <td>? <a href="/Celsius" class="mw-redirect" title="Celsius"><sup>o</sup>C</a> </td></tr> <tr> <th colspan="2" style="height: 20px; background: #e3e3e3; -moz-border-radius: 0 0 1em 1em; -webkit-border-radius: 0 0 1em 1em; border-radius: 0 0 1em 1em;">Portaal <a href="/Bestand:Portal.svg" class="image"><img alt="Portal.svg" src="https://upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Portal.svg/langnl-25px-Portal.svg.png" decoding="async" width="25" height="22" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Portal.svg/langnl-38px-Portal.svg.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/c/c9/Portal.svg/langnl-50px-Portal.svg.png 2x" /></a> <a href="/Portaal:Scheikunde" title="Portaal:Scheikunde"><font color="black">Scheikunde</font></a> </th></tr></tbody></table> <p><b>Nobelium</b> is een <a href="/Chemisch_element" title="Chemisch element">chemisch element</a> met het symbool <b>No</b> en <a href="/Atoomnummer" title="Atoomnummer">atoomnummer</a> 102 in het <a href="/Periodiek_Systeem" class="mw-redirect" title="Periodiek Systeem">Periodiek Systeem</a> van de <a href="/Scheikunde" title="Scheikunde">scheikunde</a>. Het is een <a href="/Metaal" title="Metaal">metaal</a>, maar hoe het eruit ziet is onbekend. </p><p>De <b>actinoïde</b>, ook wel <b><a href="/Actiniden" title="Actiniden">actinide</a></b> serie omvat de 15 metallische <a href="/Chemisch_element" title="Chemisch element">chemische elementen</a> met <a href="/Atoomnummer" title="Atoomnummer">atoomnummers</a> 89-103, (<a href="/Actinium" title="Actinium">actinium</a> tot <a href="/Lawrencium" title="Lawrencium">Lawrencium</a>). De actinoïde serie kreeg zijn naam van het eerste element in de serie, <a href="/Actinium" title="Actinium">actinium</a>. Het (informele) chemische symbool <b>An</b> wordt gebruikt in algemene discussies over actinoïde chemie om te verwijzen naar een actinoïde. </p><p>Net als de andere actiniden is nobelium radioactief en zal dus ook <a href="/Radioactief_afval" title="Radioactief afval">radioactief afval</a> geven. </p> <div id="toc" class="toc" role="navigation" aria-labelledby="mw-toc-heading"><input type="checkbox" role="button" id="toctogglecheckbox" class="toctogglecheckbox" style="display:none" /><div class="toctitle" lang="nl" dir="ltr"><h2 id="mw-toc-heading">Inhoud</h2><span class="toctogglespan"><label class="toctogglelabel" for="toctogglecheckbox"></label></span></div> <ul> <li class="toclevel-1 tocsection-1"><a href="#Voorkomen"><span class="tocnumber">1</span> <span class="toctext">Voorkomen</span></a></li> <li class="toclevel-1 tocsection-2"><a href="#Geschiedenis"><span class="tocnumber">2</span> <span class="toctext">Geschiedenis</span></a></li> <li class="toclevel-1 tocsection-3"><a href="#Gebruik"><span class="tocnumber">3</span> <span class="toctext">Gebruik</span></a> <ul> <li class="toclevel-2 tocsection-4"><a href="#Biologie"><span class="tocnumber">3.1</span> <span class="toctext">Biologie</span></a></li> </ul> </li> <li class="toclevel-1 tocsection-5"><a href="#Toepassingen"><span class="tocnumber">4</span> <span class="toctext">Toepassingen</span></a></li> <li class="toclevel-1 tocsection-6"><a href="#Plaats_in_het_periodiek_systeem"><span class="tocnumber">5</span> <span class="toctext">Plaats in het periodiek systeem</span></a></li> </ul> </div> <h2><span class="mw-headline" id="Voorkomen">Voorkomen</span></h2> <p>Nobelium komt niet in de natuur voor en wordt kunstmatig gemaakt in een cyclotron of deeltjesversneller door <a href="/Curium" title="Curium">curium</a> te bombarderen (beschieten) met <a href="/Koolstof" title="Koolstof">koolstof</a>-kernen. </p> <h2><span class="mw-headline" id="Geschiedenis">Geschiedenis</span></h2> <p>De ontdekking van element 102 was een ingewikkeld proces en werd opgeëist door groepen uit <a href="/Zweden" title="Zweden">Zweden</a>, de <a href="/Verenigde_Staten_van_Amerika" class="mw-redirect" title="Verenigde Staten van Amerika">Verenigde Staten</a> en de <a href="/Sovjet-Unie" title="Sovjet-Unie">Sovjet-Unie</a>. Het eerste volledige en onweerlegbare rapport van de ontdekking ervan kwam pas in 1966 van het <i>Joint Institute of Nuclear Research</i> in Dubna of Doebna (toen in de <a href="/Sovjet-Unie" title="Sovjet-Unie">Sovjet-Unie</a>). In 1992 heeft de IUPAC - IUPAP Transfermium Working Group (TWG) de claims van de ontdekking opnieuw beoordeeld en geconcludeerd dat alleen het Dubna-werk uit 1966 het verval (soort afbraak waarbij radioactiviteit en energie vrij komt) correct heeft gedetecteerd en toegewezen aan kernen met atoomnummer 102 op dat moment. De Dubna teamleden zijn daarom officieel erkend als de ontdekkers van nobelium hoewel het mogelijk is dat het werd ontdekt in Berkeley in 1959. Het element is vernoemd naar <a href="/Alfred_Nobel" title="Alfred Nobel">Alfred Nobel</a>. </p> <h2><span class="mw-headline" id="Gebruik">Gebruik</span></h2> <p>De super kleine hoeveelheden worden alleen in een laboratorium voor verdere bestudering gebruikt. </p> <h3><span class="mw-headline" id="Biologie">Biologie</span></h3> <p>Nobelium heeft geen betekenis voor de biologie. Chemici die er mee moeten werken moeten beschermende maatregelen nemen vanwege de giftigheid als gevolg van radioactiviteit. </p> <h2><span class="mw-headline" id="Toepassingen">Toepassingen</span></h2> <p>Geen </p> <h2><span class="mw-headline" id="Plaats_in_het_periodiek_systeem">Plaats in het periodiek systeem</span></h2> <center> <table cellpadding="1" cellspacing="0" style="font-size: 95%; margin: 0; background: #eee; border:1px black dotted; margin:0; padding:0;"> <tbody><tr> <th align="center" bgcolor="#cedaf2" style="border-bottom: 1px solid #aaa;"><b><a href="/Periodiek_systeem" title="Periodiek systeem">Periodiek systeem</a></b> </th></tr> <tr> <td> <table style="background:none; font-size:85%; padding:0; border-collapse:collapse; text-align:center; line-height:1.2em;" border="0" align="center"> <tbody><tr> <td style="width:1.8em; border:1px solid #aaaaaa; background-color:#bbff77;"><a href="/Waterstof_(element)" title="Waterstof (element)">H</a> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em;"> </td> <td style="width:0.9em;"> </td> <td style="width:0.9em;"> </td> <td style="width:1.8em;"> </td> <td style="width:1.8em; border:1px solid #aaaaaa; background-color:#77ffbb;"><a href="/Helium" title="Helium">He</a> </td></tr> <tr> <td style="border:1px solid #aaaaaa; background-color:#ffbbff;"><a href="/Lithium" title="Lithium">Li</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ffbb77;"><a href="/Beryllium" title="Beryllium">Be</a> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td style="border:1px solid #aaaaaa; background-color:#ccccff;"><a href="/Boor_(element)" title="Boor (element)">B</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbff77;"><a href="/Koolstof" title="Koolstof">C</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbff77;"><a href="/Stikstof_(element)" title="Stikstof (element)">N</a> </td> <td colspan="2" style="border:1px solid #aaaaaa; background-color:#bbff77;"><a href="/Zuurstof_(element)" title="Zuurstof (element)">O</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ffffbb;"><a href="/Fluor_(element)" title="Fluor (element)">F</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77ffbb;"><a href="/Neon" title="Neon">Ne</a> </td></tr> <tr> <td style="border:1px solid #aaaaaa; background-color:#ffbbff;"><a href="/Natrium" title="Natrium">Na</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ffbb77;"><a href="/Magnesium" title="Magnesium">Mg</a> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td style="border:1px solid #aaaaaa; background-color:#77bbff;"><a href="/Aluminium" title="Aluminium">Al</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ccccff;"><a href="/Silicium" title="Silicium">Si</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbff77;"><a href="/Fosfor" title="Fosfor">P</a> </td> <td colspan="2" style="border:1px solid #aaaaaa; background-color:#bbff77;"><a href="/Zwavel" title="Zwavel">S</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ffffbb;"><a href="/Chloor" title="Chloor">Cl</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77ffbb;"><a href="/Argon" title="Argon">Ar</a> </td></tr> <tr> <td style="border:1px solid #aaaaaa; background-color:#ffbbff;"><a href="/Kalium" title="Kalium">K</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ffbb77;"><a href="/Calcium" title="Calcium">Ca</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Scandium" title="Scandium">Sc</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Titanium" title="Titanium">Ti</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Vanadium" title="Vanadium">V</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Chroom_(element)" title="Chroom (element)">Cr</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Mangaan" title="Mangaan">Mn</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/IJzer_(element)" title="IJzer (element)">Fe</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Kobalt" title="Kobalt">Co</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Nikkel" title="Nikkel">Ni</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Koper_(element)" title="Koper (element)">Cu</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Zink_(element)" title="Zink (element)">Zn</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77bbff;"><a href="/Gallium" title="Gallium">Ga</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ccccff;"><a href="/Germanium" title="Germanium">Ge</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ccccff;"><a href="/Arseen" title="Arseen">As</a> </td> <td style="background-color:#ccccff;" align="right"><a href="/Seleen" title="Seleen">S</a> </td> <td style="background-color:#bbff77;" align="left"><a href="/Seleen" title="Seleen">e</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ffffbb;"><a href="/Broom_(element)" title="Broom (element)">Br</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77ffbb;"><a href="/Krypton_(element)" title="Krypton (element)">Kr</a> </td></tr> <tr> <td style="border:1px solid #aaaaaa; background-color:#ffbbff;"><a href="/Rubidium" title="Rubidium">Rb</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ffbb77;"><a href="/Strontium" title="Strontium">Sr</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Yttrium" title="Yttrium">Y</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Zirkonium" title="Zirkonium">Zr</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Niobium" title="Niobium">Nb</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Molybdeen" title="Molybdeen">Mo</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Technetium" title="Technetium">Tc</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Ruthenium" title="Ruthenium">Ru</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Rhodium" title="Rhodium">Rh</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Palladium_(element)" title="Palladium (element)">Pd</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Zilver" title="Zilver">Ag</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Cadmium" title="Cadmium">Cd</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77bbff;"><a href="/Indium" title="Indium">In</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77bbff;"><a href="/Tin_(element)" title="Tin (element)">Sn</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ccccff;"><a href="/Antimoon" title="Antimoon">Sb</a> </td> <td colspan="2" style="border:1px solid #aaaaaa; background-color:#ccccff;"><a href="/Telluur" title="Telluur">Te</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ffffbb;"><a href="/Jodium_(element)" title="Jodium (element)">I</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77ffbb;"><a href="/Xenon" title="Xenon">Xe</a> </td></tr> <tr> <td style="border:1px solid #aaaaaa; background-color:#ffbbff;"><a href="/Cesium" title="Cesium">Cs</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ffbb77;"><a href="/Barium" title="Barium">Ba</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ddbbdd;"><a href="/Lanthanide" class="mw-redirect" title="Lanthanide">*</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Hafnium" title="Hafnium">Hf</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Tantalium" title="Tantalium">Ta</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Wolfraam" title="Wolfraam">W</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Renium" title="Renium">Re</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Osmium" title="Osmium">Os</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Iridium_(element)" title="Iridium (element)">Ir</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Platina" title="Platina">Pt</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Goud" title="Goud">Au</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Kwik" title="Kwik">Hg</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77bbff;"><a href="/Thallium" title="Thallium">Tl</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77bbff;"><a href="/Lood_(element)" title="Lood (element)">Pb</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77bbff;"><a href="/Bismut" title="Bismut">Bi</a> </td> <td colspan="2" style="border:1px solid #aaaaaa; background-color:#ccccff;"><a href="/Polonium" title="Polonium">Po</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ffffbb;"><a href="/Astatine" title="Astatine">At</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77ffbb;"><a href="/Radon_(element)" title="Radon (element)">Rn</a> </td></tr> <tr> <td style="border:1px solid #aaaaaa; background-color:#ffbbff;"><a href="/Francium" title="Francium">Fr</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ffbb77;"><a href="/Radium" title="Radium">Ra</a> </td> <td style="border:1px solid #aaaaaa; background-color:#dd88dd;"><a href="/Actinide" class="mw-redirect" title="Actinide">**</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Rutherfordium" title="Rutherfordium">Rf</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Dubnium" title="Dubnium">Db</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Seaborgium" title="Seaborgium">Sg</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Bohrium" title="Bohrium">Bh</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Hassium" title="Hassium">Hs</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Meitnerium" title="Meitnerium">Mt</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Darmstadtium" title="Darmstadtium">Ds</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Roentgenium" title="Roentgenium">Rg</a> </td> <td style="border:1px solid #aaaaaa; background-color:#bbffff;"><a href="/Copernicium" title="Copernicium">Cn</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77bbff;"><a href="/Nihonium" title="Nihonium">Nh</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77bbff;"><a href="/Flerovium" title="Flerovium">Fl</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77bbff;"><a href="/Moscovium" title="Moscovium">Mc</a> </td> <td colspan="2" style="border:1px solid #aaaaaa; background-color:#77bbff;"><a href="/Livermorium" title="Livermorium">Lv</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ffffbb;"><a href="/Tennessine" title="Tennessine">Ts</a> </td> <td style="border:1px solid #aaaaaa; background-color:#77ffbb;"><a href="/Oganesson" title="Oganesson">Og</a> </td></tr> <tr> <td> </td> <td> </td> <td>↓ </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td> </td> <td colspan="2"> </td> <td> </td> <td> </td></tr> <tr> <td colspan="2" style="text-align:right;"><a href="/Lanthanide" class="mw-redirect" title="Lanthanide">*</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ddbbdd;"><a href="/Lanthanium" title="Lanthanium">La</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ddbbdd;"><a href="/Cerium" title="Cerium">Ce</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ddbbdd;"><a href="/Praseodymium" title="Praseodymium">Pr</a> </td> <td style="border:1px solid #aaaaaa; background-color:#ddbbdd;"><a href="/Neodymium" title="Neodymium">Nd</a> </td> <td style="border:1px solid #aaaaaa; 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