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<div class="pure-menu pure-menu-open pure-menu-horizontal centre" role="navigation" style="background: #000 url(../../_media/elements/discharge/blank.png) repeat-y center; background-size:contain;"> <span><a class="pure-menu-heading" href="https://winter.group.shef.ac.uk/webelements/"><img height="30" src="../../_media/icons/logo_60.png" alt="WebElements logo" /></a> <span style="color:white;">Electronegativity (Allred-Rochow)</span></span> </div> </div> </div> <div id="main">  <div class="pure-g"> <div class="pure-u-1 pure-u-sm-1-1"> <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="28" /> <input type="submit" name="sa" value="Search" /> </div> </form> <script> </script> </div> </div> </div> <main> <div class="pure-g"> <div class="pure-u-1 pure-u-sm-1-1"> <h1 class="z">Electronegativity (Allred-Rochow)</h1> </div> </div> <div class="pure-menu pure-menu-horizontal">   <ul class="pure-menu-list"> <li class="pure-menu-item pure-menu-selected z_menu"><a href="./" class="pure-menu-link">Electronegativity (Allred-Rochow)</a></li> <li class="pure-menu-item pure-menu-has-children pure-menu-allow-hover z_menu"><a href="./" class="pure-menu-link">Gallery of images</a> <ul class="pure-menu-children"> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="index.html">Periodic table gallery</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="heatscape.html">Heatscapes</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="bar_chart.html">Bar chart </a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="group_1.html">Group 1</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="group_2.html">Group 2</a></li> <li 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href="group_12.html">Group 12</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="group_13.html">Group 13</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="group_14.html">Group 14</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="group_15.html">Group 15</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="group_16.html">Group 16</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="group_17.html">Group 17</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="group_18.html">Group 18</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_2sp.html">Period 2</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_3sp.html">Period 3</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_4sp.html">Period 4sp</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_4spd.html">Period 4</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_4d.html">Period 4d</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_5sp.html">Period 5sp</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_5spd.html">Period 5spd</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_5d.html">Period 5d</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_6sp.html">Period 6sp</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_6spd.html">Period 6spd</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_6spdf.html">Period 6</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_6d.html">Period 6d</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_6f.html">Period 6f</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_7spdf.html">Period 7</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="period_7f.html">Period 7f</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="block_sp.html">s- and p-Block</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="block_d.html">d-Block</a></li> <li class="pure-menu-item, z_menu_item"><a class="pure-menu-link" href="block_f.html">f-Block</a></li> </ul> </li> </ul>     </div> <p>Allred and Rochow suggest a scale of electronegativity based upon the electrostatic force of attraction between the nucleus and the valence electrons. The values expressed here are converted to the Pauling scale (see below). The Allred-Rochow electronegativity is often denoted as Χ<sub>AR</sub></p> <figure><img class="pure-img" src= "../../_media/periodicity/tables/periodicity_cityscape_white/eneg_allred_rochow_city_w.png" alt="Image showing periodicity of the chemical elements for electronegativity (Allred-Rochow) in a periodic table cityscape style." /><figcaption>Image showing periodicity of the chemical elements for electronegativity (Allred-Rochow) in a periodic table cityscape style.</figcaption></figure> <figure><img class="pure-img" src= "../../_media/periodicity/tables/periodicity_heatscape_white/eneg_allred_rochow_heat_w.png" alt="Image showing periodicity of the chemical elements for electronegativity (Allred-Rochow) in a periodic table heatscape style." /><figcaption>Image showing periodicity of the chemical elements for electronegativity (Allred-Rochow) in a periodic table heatscape style.</figcaption></figure> <figure><img class="pure-img" src= "../../_media/periodicity/tables/periodicity_spiral_heatscape_black/eneg_allred_rochow_sp_h_b.png" alt="Image showing periodicity of the chemical elements for electronegativity (Allred-Rochow) in a spiral periodic table heatscape style." /><figcaption>Image showing periodicity of the chemical elements for electronegativity (Allred-Rochow) in a spiral periodic table heatscape style.</figcaption></figure> <figure><img class="pure-img" src= "../../_media/periodicity/tables/periodicity_spiral_columns_white/eneg_allred_rochow_sp_c_w.png" alt="Image showing periodicity of the chemical elements for electronegativity (Allred-Rochow) in a 3D spiral periodic table column style." /><figcaption>Image showing periodicity of the chemical elements for electronegativity (Allred-Rochow) in a 3D spiral periodic table column style.</figcaption></figure> <figure><img class="pure-img" src= "../../_media/periodicity/tables/periodicity_columns_white/eneg_allred_rochow_col_w.png" alt="Image showing periodicity of the chemical elements for electronegativity (Allred-Rochow) in a 3D periodic table column style." /><figcaption>Image showing periodicity of the chemical elements for electronegativity (Allred-Rochow) in a 3D periodic table column style.</figcaption></figure> <figure></figure> <figure></figure> <div class="adsense_responsive"><script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-9334432533380510" data-ad-slot="4479092381" data-ad-format="auto"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script></div> <h2 class="z">Units</h2> <p>Pauling scale</p> <h2 class="heading2">Notes</h2> <p>Most values are taken from reference 1. Additional values for elements 40-46 and 58 onwards are contained within reference 2. Values for elements 95-102 are estimates. Values for Group 18 elements are taken from reference 3. Essentially similar data for Allred-Rochow electronegativities are given in references 4 and 5, as well as many text books.</p> <p>The force of attraction is given by:</p> <p>force = <em>e</em><sup>2</sup><em>Z</em><sub>eff</sub>/<em>r</em><sup>2</sup> </p> <p>where</p> <ul> <li><em>r</em> is the distance between the electron and the nucleus (covalent radius) <li><em>e</em> is the charge on an electron <li><em>eZ</em><sub>eff</sub> is the charge effective at the electron due to the nucleus and its surrounding electrons </ul> <p>The quantity <em>Z</em><sub>eff</sub>/<em>r</em><sup>2</sup> correlates well with Pauling electronegativities and the two scales can be made to coincide by expressing the Allred-Rochow electronegativity as:</p> <p>Χ<sub>AR</sub> = 0.744 + 0.359<em>Z</em><sub>eff</sub>/<em>r</em><sup>2</sup></p> <p>You can look at visual representations of the various electronegativity scales using the following links. <ul> <li><a class="pure-menu-link" href="../electronegativity/">Electronegativity</a></li> <li><a class="pure-menu-link" href="../eneg_allen/">Electronegativity (Allen)</a></li> <li><a class="pure-menu-link" href="../eneg_allred_rochow/">Electronegativity (Allred-Rochow)</a></li> <li><a class="pure-menu-link" href="../eneg_pauling/">Electronegativity (Pauling)</a></li> <li><a class="pure-menu-link" href="../eneg_mulliken_j/">Electronegativity (Mulliken-Jaffe)</a></li> <li><a class="pure-menu-link" href="../eneg_mulliken_p/">Electronegativity (Mulliken-Jaffe) p-orbital</a></li> <li><a class="pure-menu-link" href="../eneg_mulliken_s/">Electronegativity (Mulliken-Jaffe - s)</a></li> <li><a class="pure-menu-link" href="../eneg_mulliken_sp/">Electronegativity (Mulliken-Jaffe - sp)</a></li> <li><a class="pure-menu-link" href="../eneg_mulliken_sp2/">Electronegativity (Mulliken-Jaffe -sp<sup>2</sup>)</a></li> <li><a class="pure-menu-link" href="../eneg_mulliken_sp3/">Electronegativity (Mulliken-Jaffe -sp<sup>3</sup>)</a></li> <li><a class="pure-menu-link" href="../eneg_sanderson/">Electronegativity (Sanderson)</a></li> </ul> <h2 class="z">Literature sources</h2> <ol> <li>A.L. Allred and E.G. Rochow, <em>J. Inorg. Nucl. Chem.</em>, 1958, <strong>5</strong>, 264.</li> <li>E.J. Little and M.M. Jones, <em>J. Chem. Ed.</em>, 1960, <strong>37</strong>, 231.</li> <li>J.E. Huheey, E.A. Keiter, and R.L. Keiter in <em><a href="http://www.amazon.com/exec/obidos/ASIN/006042995X/webelements">Inorganic Chemistry : Principles of Structure and Reactivity</a></em>, 4th edition, HarperCollins, New York, USA, 1993.</li> <li>W.W. Porterfield in <em>Inorganic chemistry, a unified approach</em>, Addison Wesley Publishing Co., Reading Massachusetts, USA, 1984.</li> <li>A.M. James and M.P. Lord in <em>Macmillan's Chemical and Physical Data</em>, Macmillan, London, UK, 1992.</li> </ol> </main> <div class="table-responsive"> <table class="pure-table periodic-table"> <caption class="periodic_table_caption">Explore the element of your choice through this periodic table.</caption> <thead> <tr> <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> <td class="s"> <div class="at_num">1</div> <div class="sym"><a class="sym" href="../../hydrogen/" title="Hydrogen">H</a></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> </td> </tr> <tr> <td class="s"> <div class="at_num">3</div> <div class="sym"><a class="sym" href="../../lithium/" title="Lithium">Li</a></div> </td> <td class="s"> <div class="at_num">4</div> <div class="sym"><a class="sym" href="../../beryllium/" title="Beryllium">Be</a></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> </td> <td class="p"> <div class="at_num">6</div> <div class="sym"><a class="sym" href="../../carbon/" title="|title_6">C</a></div> </td> <td class="p"> <div class="at_num">7</div> <div class="sym"><a class="sym" href="../../nitrogen/" title="Nitrogen">N</a></div> </td> <td class="p"> <div class="at_num">8</div> <div class="sym"><a class="sym" href="../../oxygen/" title="Oxygen">O</a></div> </td> <td class="p"> <div class="at_num">9</div> <div class="sym"><a class="sym" href="../../fluorine/" title="Fluorine">F</a></div> </td> <td class="p"> <div class="at_num">10</div> <div class="sym"><a class="sym" href="../../neon/" title="Neon">Ne</a></div> </td> </tr> <tr> <td class="s"> <div class="at_num">11</div> <div class="sym"><a class="sym" href="../../sodium/" title="Sodium">Na</a></div> </td> <td class="s"> <div class="at_num">12</div> <div class="sym"><a class="sym" href="../../magnesium/" title="Magnesium">Mg</a></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> </td> <td class="p"> <div class="at_num">14</div> <div class="sym"><a class="sym" href="../../silicon/" title="Silicon">Si</a></div> </td> <td class="p"> <div class="at_num">15</div> <div class="sym"><a class="sym" href="../../phosphorus/" title="Phosphorus">P</a></div> </td> <td class="p"> <div class="at_num">16</div> <div class="sym"><a class="sym" href="../../sulfur/" title="Sulfur">S</a> </div> </td> <td class="p"> <div class="at_num">17</div> <div class="sym"><a class="sym" href="../../chlorine/" title="Chlorine">Cl</a></div> </td> <td class="p"> <div class="at_num">18</div> <div class="sym"><a class="sym" href="../../argon/" title="Argon">Ar</a></div> </td> </tr> <tr> <td class="s"> <div class="at_num">19</div> <div class="sym"><a class="sym" href="../../potassium/" title="Potassium">K</a></div> </td> <td class="s"> <div class="at_num">20</div> <div class="sym"><a class="sym" href="../../calcium/" title="Calcium">Ca</a></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> </td> <td class="d"> <div class="at_num">22</div> <div class="sym"><a class="sym" href="../../titanium/" title="Titanium">Ti</a></div> </td> <td class="d"> <div class="at_num">23</div> <div class="sym"><a class="sym" href="../../vanadium/" title="Vanadium">V</a></div> </td> <td class="d"> <div class="at_num">24</div> <div class="sym"><a class="sym" href="../../chromium/" title="Chromium">Cr</a></div> </td> <td class="d"> <div class="at_num">25</div> <div class="sym"><a class="sym" href="../../manganese/" title="Manganese">Mn</a></div> </td> <td class="d"> <div class="at_num">26</div> <div class="sym"><a class="sym" href="../../iron/" title="Iron">Fe</a></div> </td> <td class="d"> <div class="at_num">27</div> <div class="sym"><a class="sym" href="../../cobalt/" title="Cobalt">Co</a></div> </td> <td class="d"> <div class="at_num">28</div> <div class="sym"><a class="sym" href="../../nickel/" title="Nickel">Ni</a></div> </td> <td class="d"> <div class="at_num">29</div> <div class="sym"><a class="sym" href="../../copper/" title="Copper">Cu</a></div> </td> <td class="d"> <div class="at_num">30</div> <div class="sym"><a class="sym" href="../../zinc/" title="Zinc">Zn</a></div> </td> <td class="p"> <div class="at_num">31</div> <div class="sym"><a class="sym" href="../../gallium/" title="Gallium">Ga</a></div> </td> <td class="p"> <div class="at_num">32</div> <div class="sym"><a class="sym" href="../../germanium/" title="Germanium">Ge</a></div> </td> <td class="p"> <div class="at_num">33</div> <div class="sym"><a class="sym" href="../../arsenic/" title="Arsenic">As</a></div> </td> <td class="p"> <div class="at_num">34</div> <div class="sym"><a class="sym" href="../../selenium/" title="Selenium">Se</a></div> </td> <td class="p"> <div class="at_num">35</div> <div class="sym"><a class="sym" href="../../bromine/" title="Bromine">Br</a></div> </td> <td class="p"> <div class="at_num">36</div> <div class="sym"><a class="sym" href="../../krypton/" title="Krypton">Kr</a></div> </td> </tr> <tr> <td class="s"> <div class="at_num">37</div> <div class="sym"><a class="sym" href="../../rubidium/" title="Rubidium">Rb</a></div> </td> <td class="s"> <div class="at_num">38</div> <div class="sym"><a class="sym" href="../../strontium/" title="Strontium">Sr</a></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> </td> <td class="d"> <div class="at_num">40</div> <div class="sym"><a class="sym" href="../../zirconium/" title="Zirconium">Zr</a></div> </td> <td class="d"> <div class="at_num">41</div> <div class="sym"><a class="sym" href="../../niobium/" title="Niobium">Nb</a></div> </td> <td class="d"> <div class="at_num">42</div> <div class="sym"><a class="sym" href="../../molybdenum/" title="Molybdenum">Mo</a></div> </td> <td class="d"> <div class="at_num">43</div> <div class="sym"><a class="sym" href="../../technetium/" title="Technetium">Tc</a></div> </td> <td class="d"> <div class="at_num">44</div> <div class="sym"><a class="sym" href="../../ruthenium/" title="Ruthenium">Ru</a></div> </td> <td class="d"> <div class="at_num">45</div> <div class="sym"><a class="sym" href="../../rhodium/" title="Rhodium">Rh</a></div> </td> <td class="d"> <div class="at_num">46</div> <div class="sym"><a class="sym" href="../../palladium/" title="Palladium">Pd</a></div> </td> <td class="d"> <div class="at_num">47</div> <div class="sym"><a class="sym" href="../../silver/" title="Silver">Ag</a></div> </td> <td class="d"> <div class="at_num">48</div> <div class="sym"><a class="sym" href="../../cadmium/" title="Cadmium">Cd</a></div> </td> <td class="p"> <div class="at_num">49</div> <div class="sym"><a class="sym" href="../../indium/" title="Indium">In</a></div> </td> <td class="p"> <div class="at_num">50</div> <div class="sym"><a class="sym" href="../../tin/" title="Tin">Sn</a></div> </td> <td class="p"> <div class="at_num">51</div> <div class="sym"><a class="sym" href="../../antimony/" title="Antimony">Sb</a></div> </td> <td class="p"> <div class="at_num">52</div> <div class="sym"><a class="sym" href="../../tellurium/" title="Tellurium">Te</a></div> </td> <td class="p"> <div class="at_num">53</div> <div class="sym"><a class="sym" href="../../iodine/" title="Iodine">I</a></div> </td> <td class="p"> <div class="at_num">54</div> <div class="sym"><a class="sym" href="../../xenon/" title="Xenon">Xe</a></div> </td> </tr> <tr> <td class="s"> <div class="at_num">55</div> <div class="sym"><a class="sym" href="../../caesium/" title="Caesium">Cs</a></div> </td> <td class="s"> <div class="at_num">56</div> <div class="sym"><a class="sym" href="../../barium/" title="Barium">Ba</a></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> </td> <td class="d"> <div class="at_num">72</div> <div class="sym"><a class="sym" href="../../hafnium/" title="Hafnium">Hf</a></div> </td> <td class="d"> <div class="at_num">73</div> <div class="sym"><a class="sym" href="../../tantalum/" title="Tantalum">Ta</a></div> </td> <td class="d"> <div class="at_num">74</div> <div class="sym"><a class="sym" href="../../tungsten/" title="Tungsten">W</a></div> </td> <td class="d"> <div class="at_num">75</div> <div class="sym"><a class="sym" href="../../rhenium/" title="Rhenium">Re</a></div> </td> <td class="d"> <div class="at_num">76</div> <div class="sym"><a class="sym" href="../../osmium/" title="Osmium">Os</a></div> </td> <td class="d"> <div class="at_num">77</div> <div class="sym"><a class="sym" href="../../iridium/" title="Iridium">Ir</a></div> </td> <td class="d"> <div class="at_num">78</div> <div class="sym"><a class="sym" href="../../platinum/" title="Platinum">Pt</a></div> </td> <td class="d"> <div class="at_num">79</div> <div class="sym"><a class="sym" href="../../gold/" title="Gold">Au</a></div> </td> <td class="d"> <div class="at_num">80</div> <div class="sym"><a class="sym" href="../../mercury/" title="Mercury">Hg</a></div> </td> <td class="p"> <div class="at_num">81</div> <div class="sym"><a class="sym" href="../../thallium/" title="Thallium">Tl</a></div> </td> <td class="p"> <div class="at_num">82</div> <div class="sym"><a class="sym" href="../../lead/" title="Lead">Pb</a></div> </td> <td class="p"> <div class="at_num">83</div> <div class="sym"><a class="sym" href="../../bismuth/" title="Bismuth">Bi</a></div> </td> <td class="p"> <div class="at_num">84</div> <div class="sym"><a class="sym" href="../../polonium/" title="Polonium">Po</a></div> </td> <td class="p"> <div class="at_num">85</div> <div class="sym"><a class="sym" href="../../astatine/" title="Astatine">At</a></div> </td> <td class="p"> <div class="at_num">86</div> <div class="sym"><a class="sym" href="../../radon/" title="Radon">Rn</a></div> </td> </tr> <tr> <td class="s"> <div class="at_num">87</div> <div class="sym"><a class="sym" href="../../francium/" title="Francium">Fr</a></div> </td> <td class="s"> <div class="at_num">88</div> <div class="sym"><a class="sym" href="../../radium/" title="Radium">Ra</a></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></div> </td> <td class="d"> <div class="at_num">104</div> <div class="sym"><a class="sym" href="../../rutherfordium/" title="Rutherfordium">Rf</a></div> </td> <td class="d"> <div class="at_num">105</div> <div class="sym"><a class="sym" href="../../dubnium/" title="Dubnium">Db</a></div> </td> <td class="d"> <div class="at_num">106</div> <div class="sym"><a class="sym" href="../../seaborgium/" title="Seaborgium">Sg</a></div> </td> <td class="d"> <div class="at_num">107</div> <div class="sym"><a class="sym" href="../../bohrium/" title="Bohrium">Bh</a></div> </td> <td class="d"> <div class="at_num">108</div> <div class="sym"><a class="sym" href="../../hassium/" title="Hassium">Hs</a></div> </td> <td class="d"> <div class="at_num">109</div> <div class="sym"><a class="sym" href="../../meitnerium/" title="Meitnerium">Mt</a></div> </td> <td class="d"> <div class="at_num">110</div> <div class="sym"><a class="sym" href="../../darmstadtium/" title="Darmstadtium">Ds</a></div> </td> <td class="d"> <div class="at_num">111</div> <div class="sym"><a class="sym" href="../../roentgenium/" title="Roentgenium">Rg</a></div> </td> <td class="d"> <div class="at_num">112</div> <div class="sym"><a class="sym" href="../../copernicium/" title="Copernicium">Cn</a></div> </td> <td class="p"> <div class="at_num">113</div> <div class="sym"><a class="sym" href="../../nihonium/" title="Nihonium">Nh</a></div> </td> <td class="p"> <div class="at_num">114</div> <div class="sym"><a class="sym" href="../../flerovium/" title="Flerovium">Fl</a></div> </td> <td class="p"> <div class="at_num">115</div> <div class="sym"><a class="sym" href="../../moscovium/" title="Moscovium">Mc</a></div> </td> <td class="p"> <div class="at_num">116</div> <div class="sym"><a class="sym" href="../../livermorium/" title="Livermorium">Lv</a></div> </td> <td class="p"> <div class="at_num">117</div> <div class="sym"><a class="sym" href="../../tennessine/" title="Tennessine">Ts</a></div> </td> <td class="p"> <div class="at_num">118</div> <div class="sym"><a class="sym" href="../../oganesson/" title="Oganesson">Og</a></div> </td> </tr> <tr> <td colspan="19" class="v"> </td> </tr> <tr> <th class="lbl" colspan="2">*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> </td> <td class="f"> <div class="at_num">58</div> <div class="sym"><a class="sym" href="../../cerium/" title="Cerium">Ce</a></div> </td> <td class="f"> <div class="at_num">59</div> <div class="sym"><a class="sym" href="../../praseodymium/" title="Praseodymium">Pr</a></div> </td> <td class="f"> <div class="at_num">60</div> <div class="sym"><a class="sym" href="../../neodymium/" title="Neodymium">Nd</a></div> </td> <td class="f"> <div class="at_num">61</div> <div class="sym"><a class="sym" href="../../promethium/" title="Promethium">Pm</a></div> </td> <td class="f"> <div class="at_num">62</div> <div class="sym"><a class="sym" href="../../samarium/" title="Samarium">Sm</a></div> </td> <td class="f"> <div class="at_num">63</div> <div class="sym"><a class="sym" href="../../europium/" title="Europium">Eu</a></div> </td> <td class="f"> <div class="at_num">64</div> <div class="sym"><a class="sym" href="../../gadolinium/" title="Gadolinium">Gd</a></div> </td> <td class="f"> <div class="at_num">65</div> <div class="sym"><a class="sym" href="../../terbium/" title="Terbium">Tb</a></div> </td> <td class="f"> <div class="at_num">66</div> <div class="sym"><a class="sym" href="../../dysprosium/" title="Dysprosium">Dy</a></div> </td> <td class="f"> <div class="at_num">67</div> <div class="sym"><a class="sym" href="../../holmium/" title="Holmium">Ho</a></div> </td> <td class="f"> <div class="at_num">68</div> <div class="sym"><a class="sym" href="../../erbium/" title="Erbium">Er</a></div> </td> <td class="f"> <div class="at_num">69</div> <div class="sym"><a class="sym" href="../../thulium/" title="Thulium">Tm</a></div> </td> <td class="f"> <div class="at_num">70</div> <div class="sym"><a class="sym" href="../../ytterbium/" title="Ytterbium">Yb</a></div> </td> <td colspan="2"></td> </tr> <tr> <th class="lbl" colspan="2">**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></div> </td> <td class="f"> <div class="at_num">90</div> <div class="sym"><a class="sym" href="../../thorium/" title="Thorium">Th</a></div> </td> <td class="f"> <div class="at_num">91</div> <div class="sym"><a class="sym" href="../../protactinium/" title="Protactinium">Pa</a></div> </td> <td class="f"> <div class="at_num">92</div> <div class="sym"><a class="sym" href="../../uranium/" title="Uranium">U</a></div> </td> <td class="f"> <div class="at_num">93</div> <div 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href="../../fermium/" title="Fermium">Fm</a></div> </td> <td class="f"> <div class="at_num">101</div> <div class="sym"><a class="sym" href="../../mendelevium/" title="Mendelevium">Md</a></div> </td> <td class="f"> <div class="at_num">102</div> <div class="sym"><a class="sym" href="../../nobelium/" title="Nobelium">No</a></div> </td> <td colspan="2"></td> </tr> </tbody> </table> </div> <div id="footer"> <footer> <div class="footer"> <div class="pure-g"> <div class="pure-u-1-2 pure-u-sm-1-2 pure-u-lg-1-4 pure-menu custom-restricted-width"> <ul class="pure-menu-list"> <li class="pure-menu-heading footer_h">Key properties</li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/eneg_pauling/">Electronegativity </a></li> <li class="pure-menu-item"><a class="pure-menu-link" href="https://www.webelements.com/periodicity/melting_point/">Melting point</a></li> <li class="pure-menu-item"><a class="pure-menu-link" 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