Yttrium vs Cesium
| Property | Y Yttrium | Cs Cesium |
|---|---|---|
| Atomic number | 39 | 55 |
| Symbol | Y | Cs |
| Name | Yttrium | Cesium |
| Category | transition-metal | alkali-metal |
| Standard Atomic Weight | 88.90584 u | 132.905452 u |
| Period | 5 | 6 |
| Group | 3 | 1 |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Kr]5s24d1 | [Xe]6s1 |
| Oxidation states | [0, 1, 2, 3] | [-1, 1] |
| Electronegativity (Pauling) | 1.22 | 0.79 |
| Electron affinity | 0.307 eV | 0.4716 eV |
| Density | 4470 kg/m³ | 1930 kg/m³ |
| Melting point | 1521.85 °C | 28.44 °C |
| Boiling point | 3344.85 °C | 670.85 °C |
| Discovery year | 1794 | 1860 |