Astatine: Properties


Atomic

  • Atomic Mass: (210)
  • Electronegativity:
    • Pauling: 2.2
    • Allred: 1.96
    • Absolute: 6.2 eV
  • Electron Affinity: 270 kJ mol-1
  • Polarizability: 6 3
  • Effective Nuclear Charge:
    • Slater: 7.6
    • Clementi: 15.16
    • Froese Fischer: 19.61
  • Radius:
    • At 5 +: 57 pm
    • At 1 -: 227 pm
  • Successive Ionization Energies:
    • At - At + : 930 kJ mol-1
    • At+1 - At+2 : 1600 kJ mol-1
    • At+2 - At+3 : (2900) kJ mol-1
    • At+3 - At+4 : (4000) kJ mol-1
    • At+4 - At+5 : (4900) kJ mol-1
    • At+5 - At+6 : (7500) kJ mol-1
    • At+6 - At+7 : (8800) kJ mol-1
    • At+7 - At+8 : (13300) kJ mol-1
    • At+8 - At+9 : (15400) kJ mol-1
    • At+9 - At+10 : (17700) kJ mol-1
  • Common Ions : At 5 +, At 1 -