Number of Isotopes: 2
Electron Affinity (kJ/mol):  
First Ionization Energy (kJ/mol): 499
Second Ionization Energy (kJ/mol): 1170
Third Ionization Energy (kJ/mol): Not applicable
Electronegativity: 1.1
Polarizability (Å3): 32.1
Atomic Volume (cm3/mol): No data
Ionic Radius2- (pm): No data
Ionic Radius1- (pm): No data
Atomic Radius (pm): No data
Ionic Radius1+ (pm): No data
Ionic Radius2+ (pm): No data
Ionic Radius3+ (pm): 126
Common Oxidation Numbers: +3
Other Oxid. Numbers: