Number of Isotopes: 2
Electron Affinity (kJ/mol): 50
First Ionization Energy (kJ/mol): 546.7
Second Ionization Energy (kJ/mol): 1085
Third Ionization Energy (kJ/mol): 2405
Electronegativity: 1.12
Polarizability (Å3): 27.7
Atomic Volume (cm3/mol): 29
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 208
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): 131
Ionic Radius3+ (pm): 108.7
Common Oxidation Numbers: +2, +3
Other Oxid. Numbers: