Bromine vs Rubidium
| Property | Br Bromine | Rb Rubidium |
|---|---|---|
| Atomic number | 35 | 37 |
| Symbol | Br | Rb |
| Name | Bromine | Rubidium |
| Category | halogen | alkali-metal |
| Standard Atomic Weight | 79.904 u | 85.4678 u |
| Period | 4 | 5 |
| Group | 17 | 1 |
| Block | p | s |
| Phase at STP | liquid | solid |
| Electron configuration | [Ar]4s23d104p5 | [Kr]5s1 |
| Oxidation states | [-1, 1, 2, 3, 4, 5, 7] | [-1, 1] |
| Electronegativity (Pauling) | 2.96 | 0.82 |
| Electron affinity | 3.3635 eV | 0.4859 eV |
| Density | 3102.8 kg/m³ | 1530 kg/m³ |
| Melting point | -7.2 °C | 39.31 °C |
| Boiling point | 58.8 °C | 687.85 °C |
| Discovery year | 1825 | 1861 |