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He - Helium
  • Atomic number: 2
  • Relative atomic mass - Ar: 4.0026
  • Melting Point (°C): -272.2
  • Boiling Point (°C): -268.93
  • Density (g/L): 0.1786
  • Electronegativity (Pauling): no data
  • Electron configuration: 1s2
Isotopic ratio :
Ar
%
3He
0.000137
4He
99.999863

Experiments:


No Experiments
 
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