Number of Isotopes: 3
Electron Affinity (kJ/mol):  
First Ionization Energy (kJ/mol): 737.7
Second Ionization Energy (kJ/mol): 1450.6
Third Ionization Energy (kJ/mol): 7732.6
Electronegativity: 1.31
Polarizability (Å3): 10.6
Atomic Volume (cm3/mol): 14
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 160
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): 86
Ionic Radius3+ (pm): No data
Common Oxidation Numbers: +2
Other Oxid. Numbers: