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Th   -   Thorium (90/232.038)

Material List
  • Naturally occurring isotopes: 232
  • Density: 11.724 (298.15K) g/cm3
  • Melting point: 1750 oC
  • Boiling point: 4787 oC
  • Latent heat of fusion: 82.93 J/g
  • Specific heat: 0.118 J/g/K (at room temp.)
  • Coefficient of lineal thermal expansion: 1.25E-05 cm/cm/K (at room temp.)
  • Thermal conductivity: 5.40E-01 W/cm/K (at room temp.)
  • Electrical resistivity: 1.31E-05 hm-cm (at room temp.)
  • lonization potential (1st): 6.08 eV
  • Electronic work function Φ: 3.41
  • Oxidation potentials: Th → Th4+ + 4e = 1.899 V
  • Chemical valence: 3 4
  • Electrochemical equivalents: 2.1643 g/amp-hr
  • lonic radius: 0.972 (Th4+) angstrom
  • Valence electron potential: 59.3 -eV
  • Principal quantum number: 7
  • Principal electron shells: K L M N O P Q
  • Electronic configuration: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 6d2 7s2
  • Valence electrons: 6d2 7s2
  • Crystal form: FCC
  • Half life: 1.4E10 years
  • Cross section σ: 74 ± 0.1 barns
  • Vapor pressure: Pa (at melting point)