Beryllium: Properties


Atomic

  • Atomic Mass: 9.01218
  • Electronegativity:
    • Pauling: 1.57
    • Allred: 1.47
    • Absolute: 4.9 eV
  • Electron Affinity: -18 kJ mol-1
  • Polarizability: 5.6 3
  • Effective Nuclear Charge:
    • Slater: 1.95
    • Clementi: 1.91
    • Froese Fischer: 2.27
  • Radius:
    • Be 2 +: 34 pm
    • Atomic: 113.3 pm
    • Covalent: 89 pm
  • Atomic Ionization Energies:
    • 2s : 899 kJ mol-1
    • 1s : 11096 kJ mol-1
  • Successive Ionization Energies:
    • Be - Be + : 899.4 kJ mol-1
    • Be+1 - Be+2 : 1757.1 kJ mol-1
    • Be+2 - Be+3 : 14848 kJ mol-1
    • Be+3 - Be+4 : 21006 kJ mol-1
  • Common Ions : Be 2 +