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>