Rubidium vs Yttrium
| Property | Rb Rubidium | Y Yttrium |
|---|---|---|
| Atomic number | 37 | 39 |
| Symbol | Rb | Y |
| Name | Rubidium | Yttrium |
| Category | alkali-metal | transition-metal |
| Standard Atomic Weight | 85.4678 u | 88.90584 u |
| Period | 5 | 5 |
| Group | 1 | 3 |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Kr]5s1 | [Kr]5s24d1 |
| Oxidation states | [-1, 1] | [0, 1, 2, 3] |
| Electronegativity (Pauling) | 0.82 | 1.22 |
| Electron affinity | 0.4859 eV | 0.307 eV |
| Density | 1530 kg/m³ | 4470 kg/m³ |
| Melting point | 39.31 °C | 1521.85 °C |
| Boiling point | 687.85 °C | 3344.85 °C |
| Discovery year | 1861 | 1794 |