Atomic

• Atomic Mass: 232.0381
• Electronegativity:
  • Pauling: 1.3
  • Allred: 1.11
• Polarizability: 32.1 ų
• 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 +}