| Rubidium | |
| Elemental State | Rb |
| Electron Configuration | 1s22s22p63s23p63d104s24p65s1 |
| First Ionization Potential | 4.177 eV |
| Electron Affinity | 0.486 eV |
| Z* | |
| Pauling Electronegativity | 0.82 |
| Covalent Radius | 2.11 Å |
| Metallic Radius | 2.50 Å |
| Ionic Radius | 1.66 Å Rb+ coordination number
= 6
1.70 Å Rb+ coordination number = 7 1.75 Å Rb+ coordination number = 8 |
| van der Waal's Radius | |
| Melting Point | 39.31 oC |
| Boiling Point | 688 oC |
| Density | 1.532 g/cm3 |
| Other Properties | |