Aluminum vs Rubidium
| Property | Al Aluminum | Rb Rubidium |
|---|---|---|
| Atomic number | 13 | 37 |
| Symbol | Al | Rb |
| Name | Aluminum | Rubidium |
| Category | post-transition-metal | alkali-metal |
| Standard Atomic Weight | 26.981538 u | 85.4678 u |
| Period | 3 | 5 |
| Group | 13 | 1 |
| Block | p | s |
| Phase at STP | solid | solid |
| Electron configuration | [Ne]3s23p1 | [Kr]5s1 |
| Oxidation states | [-2, -1, 0, 1, 2, 3] | [-1, 1] |
| Electronegativity (Pauling) | 1.61 | 0.82 |
| Electron affinity | 0.4328 eV | 0.4859 eV |
| Density | 2700 kg/m³ | 1530 kg/m³ |
| Melting point | 660.287 °C | 39.31 °C |
| Boiling point | 2518.85 °C | 687.85 °C |
| Discovery year | 1825 | 1861 |