Number of Isotopes: 1
Electron Affinity (kJ/mol): 29.6
First Ionization Energy (kJ/mol): 615.6
Second Ionization Energy (kJ/mol): 1181
Third Ionization Energy (kJ/mol): 1979.9
Electronegativity: 1.22
Polarizability (Å3): 22.7
Atomic Volume (cm3/mol): 19.8
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): 180
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 104
Common Oxidation Numbers: +3
Other Oxid. Numbers: +2