Protactinium: Properties


Atomic

  • Atomic Mass: 231.03588
  • Electronegativity:
    • Pauling: 1.5
    • Allred: 1.14
  • Polarizability: 25.4 3
  • Effective Nuclear Charge:
    • Slater: 1.8
  • Radius:
    • Pa 3 +: 113 pm
    • Pa 4 +: 98 pm
    • Pa 5 +: 89 pm
    • Atomic: 160.6 pm
  • Successive Ionization Energies:
    • Pa - Pa + : 568 kJ mol-1
  • Common Ions : Pa 3 +, Pa 4 +, Pa 5 +