Yttrium vs Radium
| Property | Y Yttrium | Ra Radium |
|---|---|---|
| Atomic number | 39 | 88 |
| Symbol | Y | Ra |
| Name | Yttrium | Radium |
| Category | transition-metal | alkaline-earth-metal |
| Standard Atomic Weight | 88.90584 u | 226 u |
| Period | 5 | 7 |
| Group | 3 | 2 |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Kr]5s24d1 | [Rn]7s2 |
| Oxidation states | [0, 1, 2, 3] | [2] |
| Electronegativity (Pauling) | 1.22 | 0.9 |
| Electron affinity | 0.307 eV | 0.096 eV |
| Density | 4470 kg/m³ | 5000 kg/m³ |
| Melting point | 1521.85 °C | 699.85 °C |
| Boiling point | 3344.85 °C | 1139.85 °C |
| Discovery year | 1794 | 1898 |