Hydrogen vs Magnesium
| Property | H Hydrogen | Mg Magnesium |
|---|---|---|
| Atomic number | 1 | 12 |
| Symbol | H | Mg |
| Name | Hydrogen | Magnesium |
| Category | nonmetal | alkaline-earth-metal |
| Standard Atomic Weight | 1.007975 u | 24.3055 u |
| Period | 1 | 3 |
| Group | 1 | 2 |
| Block | s | s |
| Phase at STP | gas | solid |
| Electron configuration | 1s1 | [Ne]3s2 |
| Oxidation states | [-1, 1] | [0, 1, 2] |
| Electronegativity (Pauling) | 2.2 | 1.31 |
| Electron affinity | 0.75419 eV | -0.4 eV |
| Density | 0.08988 kg/m³ | 1740 kg/m³ |
| Melting point | -259.34 °C | 649.85 °C |
| Boiling point | -252.87 °C | 1089.85 °C |
| Discovery year | 1766 | 1755 |