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JSci.chemistry.periodictable.helium.xml Maven / Gradle / Ivy

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE element SYSTEM "elements.dtd">
<element series="noble-gas">
   <name>Helium</name>
   <symbol>He</symbol>
   <atomic-number>2</atomic-number>
   <mass-number>4</mass-number>
   <electronegativity>0.0</electronegativity>
   <ionization-potentials>
      <first>24.587</first>
      <second>54.416</second>
   </ionization-potentials>
   <covalent-radius>0.93</covalent-radius>
   <atomic-radius>0.49</atomic-radius>
   <melting-point>0.95</melting-point>
   <boiling-point>4.215</boiling-point>
   <density>0.0001787</density>
   <specific-heat>5.193</specific-heat>
   <electrical-conductivity>0.0</electrical-conductivity>
   <thermal-conductivity>0.00152</thermal-conductivity>
</element>