Lanthanum vs Radium
| Property | La Lanthanum | Ra Radium |
|---|---|---|
| Atomic number | 57 | 88 |
| Symbol | La | Ra |
| Name | Lanthanum | Radium |
| Category | lanthanide | alkaline-earth-metal |
| Standard Atomic Weight | 138.90547 u | 226 u |
| Period | 6 | 7 |
| Group | N/A | 2 |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Xe]6s25d1 | [Rn]7s2 |
| Oxidation states | [0, 1, 2, 3] | [2] |
| Electronegativity (Pauling) | 1.1 | 0.9 |
| Electron affinity | 0.47 eV | 0.096 eV |
| Density | 6150 kg/m³ | 5000 kg/m³ |
| Melting point | 917.85 °C | 699.85 °C |
| Boiling point | 3463.85 °C | 1139.85 °C |
| Discovery year | 1839 | 1898 |