Number of Isotopes: 10
Electron Affinity (kJ/mol): 120
First Ionization Energy (kJ/mol): 708.6
Second Ionization Energy (kJ/mol): 1411.8
Third Ionization Energy (kJ/mol): 2943
Electronegativity: 1.88
Polarizability (Å3): 7.7
Atomic Volume (cm3/mol): 16.3
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 140.5
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): No data
Common Oxidation Numbers: -4, +2, +4
Other Oxid. Numbers: