Thorium: Properties


Atomic

  • Atomic Mass: 232.0381
  • Electronegativity:
    • Pauling: 1.3
    • Allred: 1.11
  • Polarizability: 32.1 3
  • Effective Nuclear Charge:
    • Slater: 1.95
  • Radius:
    • Th 3 +: 101 pm
    • Th 4 +: 99 pm
    • Atomic: 179.8 pm
  • Successive Ionization Energies:
    • Th - Th + : 587 kJ mol-1
    • Th+1 - Th+2 : 1110 kJ mol-1
    • Th+2 - Th+3 : 1978 kJ mol-1
    • Th+3 - Th+4 : 2780 kJ mol-1
  • Common Ions : Th 3 +, Th 4 +