Number of Isotopes: 9
Electron Affinity (kJ/mol):  
First Ionization Energy (kJ/mol): 1170.4
Second Ionization Energy (kJ/mol): 2046.4
Third Ionization Energy (kJ/mol): 3097.2
Electronegativity: 2.6
Polarizability (Å3): 4
Atomic Volume (cm3/mol): 37.3
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 131
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): No data
Common Oxidation Numbers: +2, +4, +6
Other Oxid. Numbers: +8