Barium
Elemental State Ba
Electron Configuration 1s22s22p63s23p63d104s24p64d105s25p66s2
First Ionization Potential 5.212 eV
Electron Affinity 0.15 eV (calculated)
Z*  
Pauling Electronegativity 0.89
Covalent Radius 1.98 Å
Metallic Radius 2.24 Å
Ionic Radius 1.49 Å Ba2+ coordination number = 6

1.52 Å Ba2+ coordination number = 7

1.56 Å Ba2+ coordination number = 8

van der Waal's Radius  
Melting Point 727 oC
Boiling Point 1897 oC
Density 3.5 g/cm3
Other Properties