<!--

       Copyright 2011 Peter Murray-Rust et. al.

       Licensed under the Apache License, Version 2.0 (the "License");
       you may not use this file except in compliance with the License.
       You may obtain a copy of the License at

           http://www.apache.org/licenses/LICENSE-2.0

       Unless required by applicable law or agreed to in writing, software
       distributed under the License is distributed on an "AS IS" BASIS,
       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
       See the License for the specific language governing permissions and
       limitations under the License.

-->

<!-- Generated 15th July 2004 by Sam Adams. Data from OpenBabel elements.txt file, and IUPAC isotope data -->
<!-- OpenBabel's covalent radii appear to be atomic radii, and the bond order radii are actually the covalent radii -->
<!-- Webelements data added 28th July -->
<!--  PMR 2007-01-12 replaced Xx by Dummy and R -->
<!-- precise masses of isotopes added 2010-03-30 by David Jessop, sourced from webelements. I've done H -> Ca plus Br and I -->
<elements>
  <element atomicnumber="0" id="Dummy">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">0.000</radius>
      <radius type="bondorder" unit="angstrom">0.000</radius>
      <radius type="vanderwaals" unit="angstrom">0.000</radius>
    </radii>
    <maxbondorder>0</maxbondorder>
    <mass source="webelements" unit="amu">0.000</mass>
    <electronegativity>0.00</electronegativity>
    <rgb red="0.07" green="0.60" blue="0.70"/>
  </element>
  <element atomicnumber="149" id="R">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">0.000</radius>
      <radius type="bondorder" unit="angstrom">0.000</radius>
      <radius type="vanderwaals" unit="angstrom">0.000</radius>
    </radii>
    <maxbondorder >0</maxbondorder>
    <mass source="webelements" unit="amu">0.000</mass>
    <electronegativity>0.00</electronegativity>
    <rgb red="0.07" green="0.50" blue="0.70"/>
  </element>
  
 <element atomicnumber="1" id="T" name="tritium" group="1" period="1">
    <maxbondorder source="openbabel">1</maxbondorder>
    <mass source="webelements" unit="amu">3.016049</mass>
    <electronicconfiguration source="webelements" type="groundstate">1s1</electronicconfiguration>
  </element>

 <element atomicnumber="1" id="D" name="deuterium" group="1" period="1">
    <maxbondorder source="openbabel">1</maxbondorder>
    <mass source="webelements" unit="amu">2.01355</mass>
    <electronicconfiguration source="webelements" type="groundstate">1s1</electronicconfiguration>
  </element>

  <element atomicnumber="1" id="H" name="hydrogen" group="1" period="1">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">0.230</radius>
      <radius type="bondorder" unit="angstrom">0.330</radius>
      <radius type="vanderwaals" unit="angstrom">1.200</radius>
    </radii>
    <maxbondorder source="openbabel">1</maxbondorder>
    <mass source="openbabel" unit="amu">1.00794</mass>
    <electronegativity source="openbabel">2.10</electronegativity>
    <rgb red="1.00" green="1.00" blue="1.00"/>
    <isotopes source="IUPAC">
      <isotope mass="1" abundanceerror="70" abundance="99.9885" preciseMass="1.007825032"/>
      <isotope mass="2" abundanceerror="70" abundance="0.0115" preciseMass="2.014101778"/>
    </isotopes>
    <mass source="webelements" unit="amu">1.00794</mass>
    <electronicconfiguration source="webelements" type="groundstate">1s1</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="empirical" unit="pm">25</radius>
      <radius type="atomic" context="calculated" unit="pm">53</radius>
      <radius type="covalent" context="empirical" unit="pm">37</radius>
      <radius type="vanderwaals" unit="pm">120</radius>
    </radii>
    <electronegativity source="webelements" type="pauling" unit="pauling">2.20</electronegativity>
  </element>


  <element atomicnumber="2" id="He" name="helium" group="18" period="1">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">0.930</radius>
      <radius type="bondorder" unit="angstrom">0.700</radius>
      <radius type="vanderwaals" unit="angstrom">1.400</radius>
    </radii>
    <maxbondorder source="openbabel">0</maxbondorder>
    <mass source="openbabel" unit="amu">4.002602</mass>
    <electronegativity source="openbabel">0.00</electronegativity>
    <rgb red="0.85" green="1.00" blue="1.00"/>
    <isotopes source="IUPAC">
      <isotope mass="3" abundanceerror="3" abundance="0.000137" preciseMass="3.016029"/>
      <isotope mass="4" abundanceerror="3" abundance="99.999863" preciseMass="4.002603"/>
    </isotopes>
    <mass source="webelements" unit="amu">4.002602</mass>
    <electronicconfiguration source="webelements" type="groundstate">1s2</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="calculated" unit="pm">31</radius>
      <radius type="covalent" context="empirical" unit="pm">32</radius>
      <radius type="vanderwaals" unit="pm">140</radius>
    </radii>
  </element>
  <element atomicnumber="3" id="Li" name="lithium" group="1" period="2">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">0.680</radius>
      <radius type="bondorder" unit="angstrom">1.230</radius>
      <radius type="vanderwaals" unit="angstrom">1.820</radius>
    </radii>
    <maxbondorder source="openbabel">1</maxbondorder>
    <mass source="openbabel" unit="amu">6.941</mass>
    <electronegativity source="openbabel">0.98</electronegativity>
    <rgb red="0.80" green="0.50" blue="1.00"/>
    <isotopes source="IUPAC">
      <isotope mass="6" abundanceerror="24" abundance="7.589" preciseMass="6.015122"/>
      <isotope mass="7" abundanceerror="24" abundance="92.411" preciseMass="7.016004"/>
    </isotopes>
    <mass source="webelements" unit="amu">6.941</mass>
    <electronicconfiguration source="webelements" type="groundstate">[He].2s1</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="empirical" unit="pm">145</radius>
      <radius type="atomic" context="calculated" unit="pm">167</radius>
      <radius type="covalent" context="empirical" unit="pm">134</radius>
      <radius type="vanderwaals" unit="pm">182</radius>
    </radii>
    <electronegativity source="webelements" type="pauling" unit="pauling">0.98</electronegativity>
  </element>
  <element atomicnumber="4" id="Be" name="beryllium" group="2" period="2">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">0.350</radius>
      <radius type="bondorder" unit="angstrom">0.900</radius>
      <radius type="vanderwaals" unit="angstrom">1.700</radius>
    </radii>
    <maxbondorder source="openbabel">2</maxbondorder>
    <mass source="openbabel" unit="amu">9.012182</mass>
    <electronegativity source="openbabel">1.57</electronegativity>
    <rgb red="0.76" green="1.00" blue="0.00"/>
    <isotopes source="IUPAC">
      <isotope mass="9" abundance="100" preciseMass="9.012182"/>
    </isotopes>
    <mass source="webelements" unit="amu">9.012182</mass>
    <electronicconfiguration source="webelements" type="groundstate">[He].2s2</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="empirical" unit="pm">105</radius>
      <radius type="atomic" context="calculated" unit="pm">112</radius>
      <radius type="covalent" context="empirical" unit="pm">90</radius>
    </radii>
    <electronegativity source="webelements" type="pauling" unit="pauling">1.57</electronegativity>
  </element>
  <element atomicnumber="5" id="B" name="boron" group="13" period="2">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">0.830</radius>
      <radius type="bondorder" unit="angstrom">0.820</radius>
      <radius type="vanderwaals" unit="angstrom">2.080</radius>
    </radii>
    <maxbondorder source="openbabel">3</maxbondorder>
    <mass source="openbabel" unit="amu">10.811</mass>
    <electronegativity source="openbabel">2.04</electronegativity>
    <rgb red="1.00" green="0.71" blue="0.71"/>
    <isotopes source="IUPAC">
      <isotope mass="10" abundanceerror="7" abundance="19.9" preciseMass="10.012937"/>
      <isotope mass="11" abundanceerror="7" abundance="80.1" preciseMass="11.009305"/>
    </isotopes>
    <mass source="webelements" unit="amu">10.811</mass>
    <electronicconfiguration source="webelements" type="groundstate">[He].2s2.2p1</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="empirical" unit="pm">85</radius>
      <radius type="atomic" context="calculated" unit="pm">87</radius>
      <radius type="covalent" context="empirical" unit="pm">82</radius>
    </radii>
    <electronegativity source="webelements" type="pauling" unit="pauling">2.04</electronegativity>
  </element>
  <element atomicnumber="6" id="C" name="carbon" group="14" period="2">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">0.680</radius>
      <radius type="bondorder" unit="angstrom">0.770</radius>
      <radius type="vanderwaals" unit="angstrom">1.950</radius>
    </radii>
    <maxbondorder source="openbabel">4</maxbondorder>
    <mass source="openbabel" unit="amu">12.0107</mass>
    <electronegativity source="openbabel">2.55</electronegativity>
    <rgb red="0.50" green="0.50" blue="0.50"/>
    <isotopes source="IUPAC">
      <isotope mass="12" abundanceerror="8" abundance="98.93" preciseMass="12.000000"/>
      <isotope mass="13" abundanceerror="8" abundance="1.07" preciseMass="13.003354"/>
    </isotopes>
    <mass source="webelements" unit="amu">12.0107</mass>
    <electronicconfiguration source="webelements" type="groundstate">[He].2s2.2p2</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="empirical" unit="pm">70</radius>
      <radius type="atomic" context="calculated" unit="pm">67</radius>
      <radius type="covalent" context="empirical" unit="pm">77</radius>
      <radius type="vanderwaals" unit="pm">170</radius>
    </radii>
    <electronegativity source="webelements" type="pauling" unit="pauling">2.55</electronegativity>
  </element>
  <element atomicnumber="7" id="N" name="nitrogen" group="15" period="2">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">0.680</radius>
      <radius type="bondorder" unit="angstrom">0.700</radius>
      <radius type="vanderwaals" unit="angstrom">1.850</radius>
    </radii>
    <maxbondorder source="openbabel">4</maxbondorder>
    <mass source="openbabel" unit="amu">14.0067</mass>
    <electronegativity source="openbabel">3.04</electronegativity>
    <rgb red="0.05" green="0.05" blue="1.00"/>
    <isotopes source="IUPAC">
      <isotope mass="14" abundanceerror="7" abundance="99.632" preciseMass="14.003074"/>
      <isotope mass="15" abundanceerror="7" abundance="0.368" preciseMass="15.000108"/>
    </isotopes>
    <mass source="webelements" unit="amu">14.0067</mass>
    <electronicconfiguration source="webelements" type="groundstate">[He].2s2.2p3</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="empirical" unit="pm">65</radius>
      <radius type="atomic" context="calculated" unit="pm">56</radius>
      <radius type="covalent" context="empirical" unit="pm">75</radius>
      <radius type="vanderwaals" unit="pm">155</radius>
    </radii>
    <electronegativity source="webelements" type="pauling" unit="pauling">3.04</electronegativity>
  </element>
  <element atomicnumber="8" id="O" name="oxygen" group="16" period="2">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">0.680</radius>
      <radius type="bondorder" unit="angstrom">0.660</radius>
      <radius type="vanderwaals" unit="angstrom">1.700</radius>
    </radii>
    <maxbondorder source="openbabel">2</maxbondorder>
    <mass source="openbabel" unit="amu">15.9994</mass>
    <electronegativity source="openbabel">3.44</electronegativity>
    <rgb red="1.00" green="0.05" blue="0.05"/>
    <isotopes source="IUPAC">
      <isotope mass="16" abundanceerror="16" abundance="99.757" preciseMass="15.99491463"/>
      <isotope mass="17" abundanceerror="1" abundance="0.038" preciseMass="16.9991312"/>
      <isotope mass="18" abundanceerror="14" abundance="0.205" preciseMass="17.9991603"/>
    </isotopes>
    <mass source="webelements" unit="amu">15.9994</mass>
    <electronicconfiguration source="webelements" type="groundstate">[He].2s2.2p4</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="empirical" unit="pm">60</radius>
      <radius type="atomic" context="calculated" unit="pm">48</radius>
      <radius type="covalent" context="empirical" unit="pm">73</radius>
      <radius type="vanderwaals" unit="pm">152</radius>
    </radii>
    <electronegativity source="webelements" type="pauling" unit="pauling">3.44</electronegativity>
  </element>
  <element atomicnumber="9" id="F" name="fluorine" group="17" period="2">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">0.640</radius>
      <radius type="bondorder" unit="angstrom">0.611</radius>
      <radius type="vanderwaals" unit="angstrom">1.730</radius>
    </radii>
    <maxbondorder source="openbabel">1</maxbondorder>
    <mass source="openbabel" unit="amu">18.9984032</mass>
    <electronegativity source="openbabel">3.98</electronegativity>
    <rgb red="0.70" green="1.00" blue="1.00"/>
    <isotopes source="IUPAC">
      <isotope mass="19" abundance="100" preciseMass="18.99840322"/>
    </isotopes>
    <mass source="webelements" unit="amu">18.9984032</mass>
    <electronicconfiguration source="webelements" type="groundstate">[He].2s2.2p5</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="empirical" unit="pm">50</radius>
      <radius type="atomic" context="calculated" unit="pm">42</radius>
      <radius type="covalent" context="empirical" unit="pm">71</radius>
      <radius type="vanderwaals" unit="pm">147</radius>
    </radii>
    <electronegativity source="webelements" type="pauling" unit="pauling">3.98</electronegativity>
  </element>
  <element atomicnumber="10" id="Ne" name="neon" group="18" period="2">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">1.120</radius>
      <radius type="bondorder" unit="angstrom">0.700</radius>
      <radius type="vanderwaals" unit="angstrom">1.540</radius>
    </radii>
    <maxbondorder source="openbabel">0</maxbondorder>
    <mass source="openbabel" unit="amu">20.1797</mass>
    <electronegativity source="openbabel">0.00</electronegativity>
    <rgb red="0.70" green="0.89" blue="0.96"/>
    <isotopes source="IUPAC">
      <isotope mass="20" abundanceerror="3" abundance="90.48" preciseMass="19.9924356"/>
      <isotope mass="21" abundanceerror="1" abundance="0.27" preciseMass="20.9938428"/>
      <isotope mass="22" abundanceerror="3" abundance="9.25" preciseMass="21.9913831"/>
    </isotopes>
    <mass source="webelements" unit="amu">20.1797</mass>
    <electronicconfiguration source="webelements" type="groundstate">[He].2s2.2p6</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="calculated" unit="pm">38</radius>
      <radius type="covalent" context="empirical" unit="pm">69</radius>
      <radius type="vanderwaals" unit="pm">154</radius>
    </radii>
  </element>
  <element atomicnumber="11" id="Na" name="sodium" group="1" period="3">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">0.970</radius>
      <radius type="bondorder" unit="angstrom">1.540</radius>
      <radius type="vanderwaals" unit="angstrom">2.270</radius>
    </radii>
    <maxbondorder source="openbabel">1</maxbondorder>
    <mass source="openbabel" unit="amu">22.989770</mass>
    <electronegativity source="openbabel">0.93</electronegativity>
    <rgb red="0.67" green="0.36" blue="0.95"/>
    <isotopes source="IUPAC">
      <isotope mass="23" abundance="100" preciseMass="22.9897677"/>
    </isotopes>
    <mass source="webelements" unit="amu">22.989770</mass>
    <electronicconfiguration source="webelements" type="groundstate">[Ne].3s1</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="empirical" unit="pm">180</radius>
      <radius type="atomic" context="calculated" unit="pm">190</radius>
      <radius type="covalent" context="empirical" unit="pm">154</radius>
      <radius type="vanderwaals" unit="pm">227</radius>
    </radii>
    <electronegativity source="webelements" type="pauling" unit="pauling">0.93</electronegativity>
  </element>
  <element atomicnumber="12" id="Mg" name="magnesium" group="2" period="3">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">1.100</radius>
      <radius type="bondorder" unit="angstrom">1.360</radius>
      <radius type="vanderwaals" unit="angstrom">1.730</radius>
    </radii>
    <maxbondorder source="openbabel">2</maxbondorder>
    <mass source="openbabel" unit="amu">24.3050</mass>
    <electronegativity source="openbabel">1.31</electronegativity>
    <rgb red="0.54" green="1.00" blue="0.00"/>
    <isotopes source="IUPAC">
      <isotope mass="24" abundanceerror="4" abundance="78.99" preciseMass="23.9850423"/>
      <isotope mass="25" abundanceerror="1" abundance="10.00" preciseMass="24.9858374"/>
      <isotope mass="26" abundanceerror="3" abundance="11.01" preciseMass="25.9825937"/>
    </isotopes>
    <mass source="webelements" unit="amu">24.3050</mass>
    <electronicconfiguration source="webelements" type="groundstate">[Ne].3s2</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="empirical" unit="pm">150</radius>
      <radius type="atomic" context="calculated" unit="pm">145</radius>
      <radius type="covalent" context="empirical" unit="pm">130</radius>
      <radius type="vanderwaals" unit="pm">173</radius>
    </radii>
    <electronegativity source="webelements" type="pauling" unit="pauling">1.31</electronegativity>
  </element>
  <element atomicnumber="13" id="Al" name="aluminium" group="13" period="3">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">1.350</radius>
      <radius type="bondorder" unit="angstrom">1.180</radius>
      <radius type="vanderwaals" unit="angstrom">2.050</radius>
    </radii>
    <maxbondorder source="openbabel">6</maxbondorder>
    <mass source="openbabel" unit="amu">26.981538</mass>
    <electronegativity source="openbabel">1.61</electronegativity>
    <rgb red="0.75" green="0.65" blue="0.65"/>
    <isotopes source="IUPAC">
      <isotope mass="27" abundance="100" preciseMass="26.9815386"/>
    </isotopes>
    <mass source="webelements" unit="amu">26.981538</mass>
    <electronicconfiguration source="webelements" type="groundstate">[Ne].3s2.3p1</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="empirical" unit="pm">125</radius>
      <radius type="atomic" context="calculated" unit="pm">118</radius>
      <radius type="covalent" context="empirical" unit="pm">118</radius>
    </radii>
    <electronegativity source="webelements" type="pauling" unit="pauling">1.61</electronegativity>
  </element>
  <element atomicnumber="14" id="Si" name="silicon" group="14" period="3">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">1.200</radius>
      <radius type="bondorder" unit="angstrom">0.937</radius>
      <radius type="vanderwaals" unit="angstrom">2.100</radius>
    </radii>
    <maxbondorder source="openbabel">6</maxbondorder>
    <mass source="openbabel" unit="amu">28.0855</mass>
    <electronegativity source="openbabel">1.90</electronegativity>
    <rgb red="0.50" green="0.60" blue="0.60"/>
    <isotopes source="IUPAC">
      <isotope mass="28" abundanceerror="7" abundance="92.2297" preciseMass="27.9769271"/>
      <isotope mass="29" abundanceerror="5" abundance="4.6832" preciseMass="28.9764949"/>
      <isotope mass="30" abundanceerror="5" abundance="3.0872" preciseMass="29.9737707"/>
    </isotopes>
    <mass source="webelements" unit="amu">28.0855</mass>
    <electronicconfiguration source="webelements" type="groundstate">[Ne].3s2.3p2</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="empirical" unit="pm">110</radius>
      <radius type="atomic" context="calculated" unit="pm">111</radius>
      <radius type="covalent" context="empirical" unit="pm">111</radius>
      <radius type="vanderwaals" unit="pm">210</radius>
    </radii>
    <electronegativity source="webelements" type="pauling" unit="pauling">1.90</electronegativity>
  </element>
  <element atomicnumber="15" id="P" name="phosphorus" group="15" period="3">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">1.100</radius>
      <radius type="bondorder" unit="angstrom">0.890</radius>
      <radius type="vanderwaals" unit="angstrom">2.080</radius>
    </radii>
    <maxbondorder source="openbabel">5</maxbondorder>
    <mass source="openbabel" unit="amu">30.973761</mass>
    <electronegativity source="openbabel">2.19</electronegativity>
    <rgb red="1.00" green="0.50" blue="0.00"/>
    <isotopes source="IUPAC">
      <isotope mass="31" abundance="100" preciseMass="30.9737620"/>
    </isotopes>
    <mass source="webelements" unit="amu">30.973761</mass>
    <electronicconfiguration source="webelements" type="groundstate">[Ne].3s2.3p3</electronicconfiguration>
    <radii source="webelements">
      <radius type="atomic" context="empirical" unit="pm">100</radius>
      <radius type="atomic" context="calculated" unit="pm">98</radius>
      <radius type="covalent" context="empirical" unit="pm">106</radius>
      <radius type="vanderwaals" unit="pm">180</radius>
    </radii>
    <electronegativity source="webelements" type="pauling" unit="pauling">2.19</electronegativity>
  </element>
  <element atomicnumber="16" id="S" name="sulphur" group="16" period="3">
    <radii source="openbabel">
      <radius type="covalent" unit="angstrom">1.020</radius>
      <radius type="bondorder" unit="angstrom">1.040</radius>
      <radius type="vanderwaals" unit="angstrom">2.000</radius>
    </radii>
    <maxbondorder source="openbabel">6</maxbondorder>
    <mass source="openbabel" unit="amu">32.065</mass>
    <electronegativity source="openbabel">2.58</electronegativity>
    <rgb red="1.00" green="1.00" blue="0.19"/>
    <isotopes source="IUPAC">
      <isotope mass="32" abundanceerror="31" abundance="94.93" preciseMass="31.97207070"/>
      <isotope mass="33" abundanceerror="2" abundance="0.76" preciseMass="32.97145843"/>
      <isotope mass="34" abundanceerror="28" abundance="4.29" preciseMass="33.96786665"/>
      <isotope mass="36" abundanceerror="1" abundance="0.02" preciseMass="35.96708062"/>
    </isotopes>
    <mass source="webelements" unit="amu">32.065</mass>
    <electronicconfiguration source="webelements" type="groundstate">[Ne].3s2.3p4</electronicconfiguration>
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      <radius type="atomic" context="empirical" unit="pm">100</radius>
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  </element>
  <element atomicnumber="113" id="Uut" name="ununtrium" group="13" period="7">
    <mass source="webelements" unit="amu">284</mass>
    <electronicconfiguration source="webelements" type="groundstate">[Rn].5f14.6d10.7s2.7p1</electronicconfiguration>
  </element>
  <element atomicnumber="114" id="Uuq" name="ununquadium" group="14" period="7">
    <mass source="webelements" unit="amu">289</mass>
    <electronicconfiguration source="webelements" type="groundstate">[Rn].5f14.6d10.7s2.7p2</electronicconfiguration>
  </element>
  <element atomicnumber="115" id="Uup" name="ununpentium" group="15" period="7">
    <mass source="webelements" unit="amu">288</mass>
    <electronicconfiguration source="webelements" type="groundstate">[Rn].5f14.6d10.7s2.7p3</electronicconfiguration>
  </element>
  <element atomicnumber="116" id="Uuh" name="ununhexium" group="16" period="7">
    <mass source="webelements" unit="amu">292</mass>
    <electronicconfiguration source="webelements" type="groundstate">[Rn].5f14.6d10.7s2.7p4</electronicconfiguration>
  </element>
</elements>
