Radium
Elemental State Ra
Electron Configuration 1s22s22p63s23p63d104s24p64d104f145s25p65d106s26p67s2
First Ionization Potential 5.278 eV
Electron Affinity   
Z*   
Pauling Electronegativity 0.9
Covalent Radius   
Metallic Radius   
Ionic Radius 1.62 Å Ra2+ coordination number = 8
van der Waal's Radius   
Melting Point 700 oC
Boiling Point 1140 oC
Density 5 g/cm3
Other Properties All isotopes are radioactive

226Ra half-life = 1599 years