Magnesium vs Radium
| Property | Mg Magnesium | Ra Radium |
|---|---|---|
| Atomic number | 12 | 88 |
| Symbol | Mg | Ra |
| Name | Magnesium | Radium |
| Category | alkaline-earth-metal | alkaline-earth-metal |
| Standard Atomic Weight | 24.3055 u | 226 u |
| Period | 3 | 7 |
| Group | 2 | 2 |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Ne]3s2 | [Rn]7s2 |
| Oxidation states | [0, 1, 2] | [2] |
| Electronegativity (Pauling) | 1.31 | 0.9 |
| Electron affinity | -0.4 eV | 0.096 eV |
| Density | 1740 kg/m³ | 5000 kg/m³ |
| Melting point | 649.85 °C | 699.85 °C |
| Boiling point | 1089.85 °C | 1139.85 °C |
| Discovery year | 1755 | 1898 |