| 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 |