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H   -   Hydrogen (1/1.0079)

Material List
  • Naturally occurring isotopes: 1.007825(protium) 2.0141(deuterium) 3.01605(tritium)
  • Density: 0.08988E-03 (273.15K) g/cm3
  • Melting point: -259.14 oC
  • Boiling point: -252.87 oC
  • Latent heat of fusion: 116.3 J/g
  • Specific heat: 14.3 J/g/K (at room temp.)
  • Coefficient of lineal thermal expansion: cm/cm/K (at room temp.)
  • Thermal conductivity: 1.82E-03 W/cm/K (at room temp.)
  • Electrical resistivity: hm-cm (at room temp.)
  • lonization potential (1st): 13.59765 eV
  • Electronic work function Φ:
  • Oxidation potentials: H2 → 2H2+ + e = 0.00000, H- → ½H2 + e = 2.25 V
  • Chemical valence: 1
  • Electrochemical equivalents: 0.037605 g/amp-hr
  • lonic radius: 0.012 angstrom
  • Valence electron potential: 1200 -eV
  • Principal quantum number: 1
  • Principal electron shells: K
  • Electronic configuration: 1s1
  • Valence electrons: 1s1
  • Crystal form: HCP
  • Half life:
  • Cross section σ: 0.33 barns
  • Vapor pressure: Pa (at melting point)