The periodic table of the elements by WebElements

<!doctype html> <html lang="en"> <head> <meta charset="utf-8">  <script async src="https://www.googletagmanager.com/gtag/js?id=UA-16744234-1"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'UA-16744234-1'); </script>  <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta name="keywords" content="periodic table, periodic chart, chemistry, atomic weight, periodicity, chemical elements, chemical, webelements, web-elements, science, homework, tableau périodique, periodiek systeem, tavola periodica, Periodensystem, tabla periódica, tavola periodica"> <meta name="Description" content="Explore the chemical elements through this periodic table"> <meta property="fb:admins" content="146243508751503"> <meta name="author" content="Mark Winter"> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'UA-16744234-1'); </script> <link rel="icon" type="image/png" href="favicon.png"> <title>The periodic table of the elements by WebElements</title>  <link rel="stylesheet" type="text/css" href="_newlands/pure/pure-min.css"> <link rel="stylesheet" type="text/css" href="_newlands/pure/grids-responsive-min.css"> <link rel="stylesheet" type="text/css" href="_newlands/css/periodic-table.css"> </head> <body> <div class="header"> <div class="home-menu pure-menu pure-menu-horizontal"> <a class="pure-menu-heading" href="https://winter.group.shef.ac.uk/webelements/"><img class="logo30" src="_media/icons/logo_60.png" alt="WebElements Home" /> WebElements</a> <div class="google_navbar_positioning"> <form action="https://www.google.com" id="cse-search-box"> <div> <input type="hidden" name="cx" value="partner-pub-9334432533380510:6223510783" /> <input type="hidden" name="ie" value="UTF-8" /> <input type="text" name="q" size="12" /> <input type="submit" name="sa" value="Search" /> </div> </form> <script></script> </div> </div> </div> <main> <nav> <div class="pure-menu pure-menu-horizontal pure-menu-scrollable"> <ul class="pure-menu-list"> <li class="pure-menu-item pure-menu-selected"><a href="https://www.webelements.com/" class="pure-menu-link">Elements   </a></li> <li class="pure-menu-item"><a href="https://www.webelements.com/compounds.html" class="pure-menu-link">Compounds   </a></li> <li class="pure-menu-item"><a href="https://www.webelements.com/nexus/printable-periodic-table/" class="pure-menu-link">Printable periodic table</a></li> </ul> </div> </nav> <article> <h1 class="z">The periodic table of the elements</h1> <p>The periodic table is an arrangment of the chemical elements ordered by atomic number so that periodic properties of the elements (chemical periodicity) are made clear.</p> <h2 class="z">Explore the chemical elements through this periodic table</h2> <div class="table-responsive"> <table class="pure-table periodic-table"> <thead> <tr> <th class="w8">Group</th> <th class="w5">1</th> <th class="w5">2</th> <th class="w2"> </th> <th class="w5">3</th> <th class="w5">4</th> <th class="w5">5</th> <th class="w5">6</th> <th class="w5">7</th> <th class="w5">8</th> <th class="w5">9</th> <th class="w5">10</th> <th class="w5">11</th> <th class="w5">12</th> <th class="w5">13</th> <th class="w5">14</th> <th class="w5">15</th> <th class="w5">16</th> <th class="w5">17</th> <th class="w5">18</th> </tr> </thead> <tbody> <tr> <th class="lbl">Period<br />1</th> <td class="s"> <div class="at_num">1</div> <div class="sym"><a class="sym" href="hydrogen/" title="Hydrogen">H</a></div> <div class="at_wt">1.0080</div> <div class="e_name">Hydrogen</div> </td> <td class="v"></td> <td colspan="16" class="v"></td> <td class="p"> <div class="at_num">2</div> <div class="sym"><a class="sym" href="helium/" title="Helium">He</a></div> <div class="at_wt">4.0026</div> <div class="e_name">Helium</div> </td> </tr> <tr> <th class="lbl">2</th> <td class="s"> <div class="at_num">3</div> <div class="sym"><a class="sym" href="lithium/" title="Lithium">Li</a></div> <div class="at_wt">6.94</div> <div class="e_name">Lithium</div> </td> <td class="s"> <div class="at_num">4</div> <div class="sym"><a class="sym" href="beryllium/" title="Beryllium">Be</a></div> <div class="at_wt">9.0122</div> <div class="e_name">Beryllium</div> </td> <td colspan="11"></td> <td class="p"> <div class="at_num">5</div> <div class="sym"><a class="sym" href="boron/" title="|title_5">B</a></div> <div class="at_wt">10.81</div> <div class="e_name">Boron</div> </td> <td class="p"> <div class="at_num">6</div> <div class="sym"><a class="sym" href="carbon/" title="|title_6">C</a></div> <div class="at_wt">12.011</div> <div class="e_name">Carbon</div> </td> <td class="p"> <div class="at_num">7</div> <div class="sym"><a class="sym" href="nitrogen/" title="Nitrogen">N</a></div> <div class="at_wt">14.007</div> <div class="e_name">Nitrogen</div> </td> <td class="p"> <div class="at_num">8</div> <div class="sym"><a class="sym" href="oxygen/" title="Oxygen">O</a></div> <div class="at_wt">15.999</div> <div class="e_name">Oxygen</div> </td> <td class="p"> <div class="at_num">9</div> <div class="sym"><a class="sym" href="fluorine/" title="Fluorine">F</a></div> <div class="at_wt">18.998</div> <div class="e_name">Fluorine</div> </td> <td class="p"> <div class="at_num">10</div> <div class="sym"><a class="sym" href="neon/" title="Neon">Ne</a></div> <div class="at_wt">20.180</div> <div class="e_name">Neon</div> </td> </tr> <tr> <th class="lbl">3</th> <td class="s"> <div class="at_num">11</div> <div class="sym"><a class="sym" href="sodium/" title="Sodium">Na</a></div> <div class="at_wt">22.990</div> <div class="e_name">Sodium</div> </td> <td class="s"> <div class="at_num">12</div> <div class="sym"><a class="sym" href="magnesium/" title="Magnesium">Mg</a></div> <div class="at_wt">24.305</div> <div class="e_name">Magnesium</div> </td> <td colspan="11" class="void"></td> <td class="p"> <div class="at_num">13</div> <div class="sym"><a class="sym" href="aluminium/" title="Aluminium">Al</a></div> <div class="at_wt">26.982</div> <div class="e_name">Aluminium</div> </td> <td class="p"> <div class="at_num">14</div> <div class="sym"><a class="sym" href="silicon/" title="Silicon">Si</a></div> <div class="at_wt">28.085</div> <div class="e_name">Silicon</div> </td> <td class="p"> <div class="at_num">15</div> <div class="sym"><a class="sym" href="phosphorus/" title="Phosphorus">P</a></div> <div class="at_wt">30.974</div> <div class="e_name">Phosphorus</div> </td> <td class="p"> <div class="at_num">16</div> <div class="sym"><a class="sym" href="sulfur/" title="Sulfur">S</a> </div> <div class="at_wt">32.06</div> <div class="e_name">Sulfur</div> </td> <td class="p"> <div class="at_num">17</div> <div class="sym"><a class="sym" href="chlorine/" title="Chlorine">Cl</a></div> <div class="at_wt">35.45</div> <div class="e_name">Chlorine</div> </td> <td class="p"> <div class="at_num">18</div> <div class="sym"><a class="sym" href="argon/" title="Argon">Ar</a></div> <div class="at_wt">39.95</div> <div class="e_name">Argon</div> </td> </tr> <tr> <th class="lbl">4</th> <td class="s"> <div class="at_num">19</div> <div class="sym"><a class="sym" href="potassium/" title="Potassium">K</a></div> <div class="at_wt">39.098</div> <div class="e_name">Potassium</div> </td> <td class="s"> <div class="at_num">20</div> <div class="sym"><a class="sym" href="calcium/" title="Calcium">Ca</a></div> <div class="at_wt">40.078</div> <div class="e_name">Calcium</div> </td> <td class="void"></td> <td class="d"> <div class="at_num">21</div> <div class="sym"><a class="sym" href="scandium/" title="Scandium">Sc</a></div> <div class="at_wt">44.956</div> <div class="e_name">Scandium</div> </td> <td class="d"> <div class="at_num">22</div> <div class="sym"><a class="sym" href="titanium/" title="Titanium">Ti</a></div> <div class="at_wt">47.867</div> <div class="e_name">Titanium</div> </td> <td class="d"> <div class="at_num">23</div> <div class="sym"><a class="sym" href="vanadium/" title="Vanadium">V</a></div> <div class="at_wt">50.942</div> <div class="e_name">Vanadium</div> </td> <td class="d"> <div class="at_num">24</div> <div class="sym"><a class="sym" href="chromium/" title="Chromium">Cr</a></div> <div class="at_wt">51.996</div> <div class="e_name">Chromium</div> </td> <td class="d"> <div class="at_num">25</div> <div class="sym"><a class="sym" href="manganese/" title="Manganese">Mn</a></div> <div class="at_wt">54.938</div> <div class="e_name">Manganese</div> </td> <td class="d"> <div class="at_num">26</div> <div class="sym"><a class="sym" href="iron/" title="Iron">Fe</a></div> <div class="at_wt">55.845</div> <div class="e_name">Iron</div> </td> <td class="d"> <div class="at_num">27</div> <div class="sym"><a class="sym" href="cobalt/" title="Cobalt">Co</a></div> <div class="at_wt">58.933</div> <div class="e_name">Cobalt</div> </td> <td class="d"> <div class="at_num">28</div> <div class="sym"><a class="sym" href="nickel/" title="Nickel">Ni</a></div> <div class="at_wt">58.693</div> <div class="e_name">Nickel</div> </td> <td class="d"> <div class="at_num">29</div> <div class="sym"><a class="sym" href="copper/" title="Copper">Cu</a></div> <div class="at_wt">63.546</div> <div class="e_name">Copper</div> </td> <td class="d"> <div class="at_num">30</div> <div class="sym"><a class="sym" href="zinc/" title="Zinc">Zn</a></div> <div class="at_wt">65.38</div> <div class="e_name">Zinc</div> </td> <td class="p"> <div class="at_num">31</div> <div class="sym"><a class="sym" href="gallium/" title="Gallium">Ga</a></div> <div class="at_wt">69.723</div> <div class="e_name">Gallium</div> </td> <td class="p"> <div class="at_num">32</div> <div class="sym"><a class="sym" href="germanium/" title="Germanium">Ge</a></div> <div class="at_wt">72.630</div> <div class="e_name">Germanium</div> </td> <td class="p"> <div class="at_num">33</div> <div class="sym"><a class="sym" href="arsenic/" title="Arsenic">As</a></div> <div class="at_wt">74.922</div> <div class="e_name">Arsenic</div> </td> <td class="p"> <div class="at_num">34</div> <div class="sym"><a class="sym" href="selenium/" title="Selenium">Se</a></div> <div class="at_wt">78.971</div> <div class="e_name">Selenium</div> </td> <td class="p"> <div class="at_num">35</div> <div class="sym"><a class="sym" href="bromine/" title="Bromine">Br</a></div> <div class="at_wt">79.904</div> <div class="e_name">Bromine</div> </td> <td class="p"> <div class="at_num">36</div> <div class="sym"><a class="sym" href="krypton/" title="Krypton">Kr</a></div> <div class="at_wt">83.798</div> <div class="e_name">Krypton</div> </td> </tr> <tr> <th class="lbl">5</th> <td class="s"> <div class="at_num">37</div> <div class="sym"><a class="sym" href="rubidium/" title="Rubidium">Rb</a></div> <div class="at_wt">85.468</div> <div class="e_name">Rubidium</div> </td> <td class="s"> <div class="at_num">38</div> <div class="sym"><a class="sym" href="strontium/" title="Strontium">Sr</a></div> <div class="at_wt">87.62</div> <div class="e_name">Strontium</div> </td> <td class="void"></td> <td class="d"> <div class="at_num">39</div> <div class="sym"><a class="sym" href="yttrium/" title="Yttrium">Y</a></div> <div class="at_wt">88.906</div> <div class="e_name">Yttrium</div> </td> <td class="d"> <div class="at_num">40</div> <div class="sym"><a class="sym" href="zirconium/" title="Zirconium">Zr</a></div> <div class="at_wt">91.224</div> <div class="e_name">Zirconium</div> </td> <td class="d"> <div class="at_num">41</div> <div class="sym"><a class="sym" href="niobium/" title="Niobium">Nb</a></div> <div class="at_wt">92.906</div> <div class="e_name">Niobium</div> </td> <td class="d"> <div class="at_num">42</div> <div class="sym"><a class="sym" href="molybdenum/" title="Molybdenum">Mo</a></div> <div class="at_wt">95.95</div> <div class="e_name">Molybdenum</div> </td> <td class="d"> <div class="at_num">43</div> <div class="sym"><a class="sym" href="technetium/" title="Technetium">Tc</a> <small>☢</small></div> <div class="at_wt">98.906</div> <div class="e_name">Technetium</div> </td> <td class="d"> <div class="at_num">44</div> <div class="sym"><a class="sym" href="ruthenium/" title="Ruthenium">Ru</a></div> <div class="at_wt">101.07</div> <div class="e_name">Ruthenium</div> </td> <td class="d"> <div class="at_num">45</div> <div class="sym"><a class="sym" href="rhodium/" title="Rhodium">Rh</a></div> <div class="at_wt">102.91</div> <div class="e_name">Rhodium</div> </td> <td class="d"> <div class="at_num">46</div> <div class="sym"><a class="sym" href="palladium/" title="Palladium">Pd</a></div> <div class="at_wt">106.42</div> <div class="e_name">Palladium</div> </td> <td class="d"> <div class="at_num">47</div> <div class="sym"><a class="sym" href="silver/" title="Silver">Ag</a></div> <div class="at_wt">107.87</div> <div class="e_name">Silver</div> </td> <td class="d"> <div class="at_num">48</div> <div class="sym"><a class="sym" href="cadmium/" title="Cadmium">Cd</a></div> <div class="at_wt">112.41</div> <div class="e_name">Cadmium</div> </td> <td class="p"> <div class="at_num">49</div> <div class="sym"><a class="sym" href="indium/" title="Indium">In</a></div> <div class="at_wt">114.82</div> <div class="e_name">Indium</div> </td> <td class="p"> <div class="at_num">50</div> <div class="sym"><a class="sym" href="tin/" title="Tin">Sn</a></div> <div class="at_wt">118.71</div> <div class="e_name">Tin</div> </td> <td class="p"> <div class="at_num">51</div> <div class="sym"><a class="sym" href="antimony/" title="Antimony">Sb</a></div> <div class="at_wt">121.76</div> <div class="e_name">Antimony</div> </td> <td class="p"> <div class="at_num">52</div> <div class="sym"><a class="sym" href="tellurium/" title="Tellurium">Te</a></div> <div class="at_wt">127.60</div> <div class="e_name">Tellurium</div> </td> <td class="p"> <div class="at_num">53</div> <div class="sym"><a class="sym" href="iodine/" title="Iodine">I</a></div> <div class="at_wt">126.90</div> <div class="e_name">Iodine</div> </td> <td class="p"> <div class="at_num">54</div> <div class="sym"><a class="sym" href="xenon/" title="Xenon">Xe</a></div> <div class="at_wt">131.29</div> <div class="e_name">Xenon</div> </td> </tr> <tr> <th class="lbl">6</th> <td class="s"> <div class="at_num">55</div> <div class="sym"><a class="sym" href="caesium/" title="Caesium">Cs</a></div> <div class="at_wt">132.91</div> <div class="e_name">Caesium</div> </td> <td class="s"> <div class="at_num">56</div> <div class="sym"><a class="sym" href="barium/" title="Barium">Ba</a></div> <div class="at_wt">137.33</div> <div class="e_name">Barium</div> </td> <th class="asterisk">*</th> <td class="d"> <div class="at_num xd">71</div> <div class="sym"><a class="sym" href="lutetium/" title="Lutetium">Lu</a></div> <div class="at_wt">174.97</div> <div class="e_name">Lutetium</div> </td> <td class="d"> <div class="at_num">72</div> <div class="sym"><a class="sym" href="hafnium/" title="Hafnium">Hf</a></div> <div class="at_wt">178.49</div> <div class="e_name">Hafnium</div> </td> <td class="d"> <div class="at_num">73</div> <div class="sym"><a class="sym" href="tantalum/" title="Tantalum">Ta</a></div> <div class="at_wt">180.95</div> <div class="e_name">Tantalum</div> </td> <td class="d"> <div class="at_num">74</div> <div class="sym"><a class="sym" href="tungsten/" title="Tungsten">W</a></div> <div class="at_wt">183.84</div> <div class="e_name">Tungsten</div> </td> <td class="d"> <div class="at_num">75</div> <div class="sym"><a class="sym" href="rhenium/" title="Rhenium">Re</a></div> <div class="at_wt">186.21</div> <div class="e_name">Rhenium</div> </td> <td class="d"> <div class="at_num">76</div> <div class="sym"><a class="sym" href="osmium/" title="Osmium">Os</a></div> <div class="at_wt">190.23</div> <div class="e_name">Osmium</div> </td> <td class="d"> <div class="at_num">77</div> <div class="sym"><a class="sym" href="iridium/" title="Iridium">Ir</a></div> <div class="at_wt">192.22</div> <div class="e_name">Iridium</div> </td> <td class="d"> <div class="at_num">78</div> <div class="sym"><a class="sym" href="platinum/" title="Platinum">Pt</a></div> <div class="at_wt">195.08</div> <div class="e_name">Platinum</div> </td> <td class="d"> <div class="at_num">79</div> <div class="sym"><a class="sym" href="gold/" title="Gold">Au</a></div> <div class="at_wt">196.97</div> <div class="e_name">Gold</div> </td> <td class="d"> <div class="at_num">80</div> <div class="sym"><a class="sym" href="mercury/" title="Mercury">Hg</a></div> <div class="at_wt">200.59</div> <div class="e_name">Mercury</div> </td> <td class="p"> <div class="at_num">81</div> <div class="sym"><a class="sym" href="thallium/" title="Thallium">Tl</a></div> <div class="at_wt">204.38</div> <div class="e_name">Thallium</div> </td> <td class="p"> <div class="at_num">82</div> <div class="sym"><a class="sym" href="lead/" title="Lead">Pb</a></div> <div class="at_wt">207.2</div> <div class="e_name">Lead</div> </td> <td class="p"> <div class="at_num">83</div> <div class="sym"><a class="sym" href="bismuth/" title="Bismuth">Bi</a></div> <div class="at_wt">208.98</div> <div class="e_name">Bismuth</div> </td> <td class="p"> <div class="at_num">84</div> <div class="sym"><a class="sym" href="polonium/" title="Polonium">Po</a> <small>☢</small></div> <div class="at_wt">208.98</div> <div class="e_name">Polonium</div> </td> <td class="p"> <div class="at_num">85</div> <div class="sym"><a class="sym" href="astatine/" title="Astatine">At</a> <small>☢</small></div> <div class="at_wt">209.99</div> <div class="e_name">Astatine</div> </td> <td class="p"> <div class="at_num">86</div> <div class="sym"><a class="sym" href="radon/" title="Radon">Rn</a> <small>☢</small></div> <div class="at_wt">222.02</div> <div class="e_name">Radon</div> </td> </tr> <tr> <th class="lbl">7</th> <td class="s"> <div class="at_num">87</div> <div class="sym"><a class="sym" href="francium/" title="Francium">Fr</a> <small>☢</small></div> <div class="at_wt">223.02</div> <div class="e_name">Francium</div> </td> <td class="s"> <div class="at_num">88</div> <div class="sym"><a class="sym" href="radium/" title="Radium">Ra</a> <small>☢</small></div> <div class="at_wt">226.03</div> <div class="e_name">Radium</div> </td> <th class="v">**</th> <td class="d"> <div class="at_num">103</div> <div class="sym"><a class="sym" href="lawrencium/" title="Lawrencium">Lr</a> <small>☢</small></div> <div class="at_wt">266.12</div> <div class="e_name">Lawrencium</div> </td> <td class="d"> <div class="at_num">104</div> <div class="sym"><a class="sym" href="rutherfordium/" title="Rutherfordium">Rf</a> <small>☢</small></div> <div class="at_wt">263.11</div> <div class="e_name">Rutherfordium</div> </td> <td class="d"> <div class="at_num">105</div> <div class="sym"><a class="sym" href="dubnium/" title="Dubnium">Db</a> <small>☢</small></div> <div class="at_wt">268.13</div> <div class="e_name">Dubnium</div> </td> <td class="d"> <div class="at_num">106</div> <div class="sym"><a class="sym" href="seaborgium/" title="Seaborgium">Sg</a> <small>☢</small></div> <div class="at_wt">269.13</div> <div class="e_name">Seaborgium</div> </td> <td class="d"> <div class="at_num">107</div> <div class="sym"><a class="sym" href="bohrium/" title="Bohrium">Bh</a> <small>☢</small></div> <div class="at_wt">270.13</div> <div class="e_name">Bohrium</div> </td> <td class="d"> <div class="at_num">108</div> <div class="sym"><a class="sym" href="hassium/" title="Hassium">Hs</a> <small>☢</small></div> <div class="at_wt">270.13</div> <div class="e_name">Hassium</div> </td> <td class="d"> <div class="at_num">109</div> <div class="sym"><a class="sym" href="meitnerium/" title="Meitnerium">Mt</a> <small>☢</small></div> <div class="at_wt">278.16</div> <div class="e_name">Meitnerium</div> </td> <td class="d"> <div class="at_num">110</div> <div class="sym"><a class="sym" href="darmstadtium/" title="Darmstadtium">Ds</a> <small>☢</small></div> <div class="at_wt">281.16</div> <div class="e_name">Darmstadtium</div> </td> <td class="d"> <div class="at_num">111</div> <div class="sym"><a class="sym" href="roentgenium/" title="Roentgenium">Rg</a> <small>☢</small></div> <div class="at_wt">281.17</div> <div class="e_name">Roentgenium</div> </td> <td class="d"> <div class="at_num">112</div> <div class="sym"><a class="sym" href="copernicium/" title="Copernicium">Cn</a> <small>☢</small></div> <div class="at_wt">285.18</div> <div class="e_name">Copernicium</div> </td> <td class="p"> <div class="at_num">113</div> <div class="sym"><a class="sym" href="nihonium/" title="Nihonium">Nh</a> <small>☢</small></div> <div class="at_wt">286.18</div> <div class="e_name">Nihonium</div> </td> <td class="p"> <div class="at_num">114</div> <div class="sym"><a class="sym" href="flerovium/" title="Flerovium">Fl</a> <small>☢</small></div> <div class="at_wt">289.19</div> <div class="e_name">Flerovium</div> </td> <td class="p"> <div class="at_num">115</div> <div class="sym"><a class="sym" href="moscovium/" title="Moscovium">Mc</a> <small>☢</small></div> <div class="at_wt">289.20</div> <div class="e_name">Moscovium</div> </td> <td class="p"> <div class="at_num">116</div> <div class="sym"><a class="sym" href="livermorium/" title="Livermorium">Lv</a> <small>☢</small></div> <div class="at_wt">293.20</div> <div class="e_name">Livermorium</div> </td> <td class="p"> <div class="at_num">117</div> <div class="sym"><a class="sym" href="tennessine/" title="Tennessine">Ts</a> <small>☢</small></div> <div class="at_wt">294.21</div> <div class="e_name">Tennessine</div> </td> <td class="p"> <div class="at_num">118</div> <div class="sym"><a class="sym" href="oganesson/" title="Oganesson">Og</a> <small>☢</small></div> <div class="at_wt">294.21</div> <div class="e_name">Oganesson</div> </td> </tr> <tr> <td colspan="20" class="v"> </td> </tr> <tr> <th class="lbl" colspan="3">*Lanthanoids</th> <th class="v">*</th> <td class="f"> <div class="at_num">57</div> <div class="sym"><a class="sym" href="lanthanum/" title="Lanthanum">La</a></div> <div class="at_wt">138.91</div> <div class="e_name">Lanthanum</div> </td> <td class="f"> <div class="at_num">58</div> <div class="sym"><a class="sym" href="cerium/" title="Cerium">Ce</a></div> <div class="at_wt">140.12</div> <div class="e_name">Cerium</div> </td> <td class="f"> <div class="at_num">59</div> <div class="sym"><a class="sym" href="praseodymium/" title="Praseodymium">Pr</a></div> <div class="at_wt">140.91</div> <div class="e_name">Praseodymium</div> </td> <td class="f"> <div class="at_num">60</div> <div class="sym"><a class="sym" href="neodymium/" title="Neodymium">Nd</a></div> <div class="at_wt">144.24</div> <div class="e_name">Neodymium</div> </td> <td class="f"> <div class="at_num">61</div> <div class="sym"><a class="sym" href="promethium/" title="Promethium">Pm</a> <small>☢</small></div> <div class="at_wt">144.91</div> <div class="e_name">Promethium</div> </td> <td class="f"> <div class="at_num">62</div> <div class="sym"><a class="sym" href="samarium/" title="Samarium">Sm</a></div> <div class="at_wt">150.36</div> <div class="e_name">Samarium</div> </td> <td class="f"> <div class="at_num">63</div> <div class="sym"><a class="sym" href="europium/" title="Europium">Eu</a></div> <div class="at_wt">151.96</div> <div class="e_name">Europium</div> </td> <td class="f"> <div class="at_num">64</div> <div class="sym"><a class="sym" href="gadolinium/" title="Gadolinium">Gd</a></div> <div class="at_wt">157.25</div> <div class="e_name">Gadolinium</div> </td> <td class="f"> <div class="at_num">65</div> <div class="sym"><a class="sym" href="terbium/" title="Terbium">Tb</a></div> <div class="at_wt">158.93</div> <div class="e_name">Terbium</div> </td> <td class="f"> <div class="at_num">66</div> <div class="sym"><a class="sym" href="dysprosium/" title="Dysprosium">Dy</a></div> <div class="at_wt">162.50</div> <div class="e_name">Dysprosium</div> </td> <td class="f"> <div class="at_num">67</div> <div class="sym"><a class="sym" href="holmium/" title="Holmium">Ho</a></div> <div class="at_wt">164.93</div> <div class="e_name">Holmium</div> </td> <td class="f"> <div class="at_num">68</div> <div class="sym"><a class="sym" href="erbium/" title="Erbium">Er</a></div> <div class="at_wt">167.26</div> <div class="e_name">Erbium</div> </td> <td class="f"> <div class="at_num">69</div> <div class="sym"><a class="sym" href="thulium/" title="Thulium">Tm</a></div> <div class="at_wt">168.93</div> <div class="e_name">Thulium</div> </td> <td class="f"> <div class="at_num">70</div> <div class="sym"><a class="sym" href="ytterbium/" title="Ytterbium">Yb</a></div> <div class="at_wt">173.05</div> <div class="e_name">Ytterbium</div> </td> <td colspan="2"></td> </tr> <tr> <th class="lbl" colspan="3">**Actinoids</th> <th class="v">**</th> <td class="f"> <div class="at_num">89</div> <div class="sym"><a class="sym" href="actinium/" title="Actinium">Ac</a> <small>☢</small></div> <div class="at_wt">227.03</div> <div class="e_name">Actinium</div> </td> <td class="f"> <div class="at_num">90</div> <div class="sym"><a class="sym" href="thorium/" title="Thorium">Th</a> <small>☢</small></div> <div class="at_wt">232.04</div> <div class="e_name">Thorium</div> </td> <td class="f"> <div class="at_num">91</div> <div class="sym"><a class="sym" href="protactinium/" title="Protactinium">Pa</a> <small>☢</small></div> <div class="at_wt">231.04</div> <div class="e_name">Protactinium</div> </td> <td class="f"> <div class="at_num">92</div> <div class="sym"><a class="sym" href="uranium/" title="Uranium">U</a> <small>☢</small></div> <div class="at_wt">238.03</div> <div class="e_name">Uranium</div> </td> <td class="f"> <div class="at_num">93</div> <div class="sym"><a class="sym" href="neptunium/" title="Neptunium">Np</a> <small>☢</small></div> <div class="at_wt">237.05</div> <div class="e_name">Neptunium</div> </td> <td class="f"> <div class="at_num">94</div> <div class="sym"><a class="sym" href="plutonium/" title="Plutonium">Pu</a> <small>☢</small></div> <div class="at_wt">244.06</div> <div class="e_name">Plutonium</div> </td> <td class="f"> <div class="at_num">95</div> <div class="sym"><a class="sym" href="americium/" title="Americium">Am</a> <small>☢</small></div> <div class="at_wt">243.06</div> <div class="e_name">Americium</div> </td> <td class="f"> <div class="at_num">96</div> <div class="sym"><a class="sym" href="curium/" title="Curium">Cm</a> <small>☢</small></div> <div class="at_wt">247.07</div> <div class="e_name">Curium</div> </td> <td class="f"> <div class="at_num">97</div> <div class="sym"><a class="sym" href="berkelium/" title="Berkelium">Bk</a> <small>☢</small></div> <div class="at_wt">247.07</div> <div class="e_name">Berkelium</div> </td> <td class="f"> <div class="at_num">98</div> <div class="sym"><a class="sym" href="californium/" title="Californium">Cf</a> <small>☢</small></div> <div class="at_wt">251.08</div> <div class="e_name">Californium</div> </td> <td class="f"> <div class="at_num">99</div> <div class="sym"><a class="sym" href="einsteinium/" title="Einsteinium">Es</a> <small>☢</small></div> <div class="at_wt">252.09</div> <div class="e_name">Einsteinium</div> </td> <td class="f"> <div class="at_num">100</div> <div class="sym"><a class="sym" href="fermium/" title="Fermium">Fm</a> <small>☢</small></div> <div class="at_wt">257.10</div> <div class="e_name">Fermium</div> </td> <td class="f"> <div class="at_num">101</div> <div class="sym"><a class="sym" href="mendelevium/" title="Mendelevium">Md</a> <small>☢</small></div> <div class="at_wt">258.10</div> <div class="e_name">Mendelevium</div> </td> <td class="f"> <div class="at_num">102</div> <div class="sym"><a class="sym" href="nobelium/" title="Nobelium">No</a> <small>☢</small></div> <div class="at_wt">259.10</div> <div class="e_name">Nobelium</div> </td> <td colspan="2"></td> </tr> </tbody> </table> </div> <p>The standard form of the periodic table shown here includes periods (shown horizontally) and groups (shown vertically). The properties of elements in groups are similar in some respects to each other.</p> <p> There is no one single or best structure for the periodic table but by whatever consensus there is, the form used here is very useful and the most common. The periodic table is a masterpiece of organised chemical information and the evolution of chemistry's periodic table into the current form is an astonishing achievement.</p> </article> </main>  <footer> <div class="footer"> <div class="pure-menu pure-menu-horizontal pure-menu-scrollable"> <ul class="pure-menu-list z_menu"> <li class="pure-menu-item z_menu"><a class="pure-menu-link z" href="https://winter.group.shef.ac.uk/webelements/nexus/printable_periodic_table.html">▸▸ Printable periodic table</a></li> <li class="pure-menu-item z_menu"><a class="pure-menu-link z" href="https://winter.group.shef.ac.uk/orbitron/">Orbitron</a></li> <li class="pure-menu-item z_menu"><a class="pure-menu-link z" href="https://winter.group.shef.ac.uk/chemdex/">Chemdex</a></li> <li class="pure-menu-item z_menu"><a class="pure-menu-link z" href="https://winter.group.shef.ac.uk/chemputer/">Chemputer</a></li> <li class="pure-menu-item z_menu"><a class="pure-menu-link z" href="https://winter.group.shef.ac.uk/vsepr/">VSEPR</a></li> <li class="pure-menu-item z_menu"><a class="pure-menu-link z" href="https://www.facebook.com/webelements.periodic.table">Facebook</a></li> <li class="pure-menu-item z_menu"><a class="pure-menu-link z" href="https://twitter.com/periodic_table">Twitter</a></li> <li class="pure-menu-item z_menu"><a class="pure-menu-link z" href="https://www.pinterest.com/periodictable/">Pinterest</a></li> <li class="pure-menu-item z_menu"><a class="pure-menu-link z" href="https://winter.group.shef.ac.uk/webelements/nexus/privacy.html" title="Your privacy">Privacy</a></li> <li class="pure-menu-item z_menu"><a class="pure-menu-link z" href="https://winter.group.shef.ac.uk/webelements/nexus/about.html" title="About WebElements">About</a></li> <li class="pure-menu-item z_menu"><a class="pure-menu-link z" href="https://winter.group.shef.ac.uk/webelements/nexus/copyright.html" title="Copyright information about WebElements">Copyright</a></li> <li class="pure-menu-item z_menu"><a class="pure-menu-link z" href="https://winter.group.shef.ac.uk/nexus/acknowledgements.html" title="Acknowledgements">Thanks...</a></li> </ul> </div> </div> <address> <p> <a href="https://winter.group.shef.ac.uk/webelements/"><img class="logo_m" src="_media/icons/logo_60.png" alt="WebElements home"></a><br> <strong>WebElements:</strong> THE periodic table on the WWW [<a href="https://winter.group.shef.ac.uk/webelements/">winter.group.shef.ac.uk/webelements/</a>]<br> <a href="https://www.webelements.com/nexus/webelements-and-copyright/">Copyright </a> 1993-2024 <a href="https://winter.group.shef.ac.uk/">Prof Mark J. 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