Hydrogen vs Iron
| Property | H Hydrogen | Fe Iron |
|---|---|---|
| Atomic number | 1 | 26 |
| Symbol | H | Fe |
| Name | Hydrogen | Iron |
| Category | nonmetal | transition-metal |
| Standard Atomic Weight | 1.007975 u | 55.845 u |
| Period | 1 | 4 |
| Group | 1 | 8 |
| Block | s | s |
| Phase at STP | gas | solid |
| Electron configuration | 1s1 | [Ar]4s23d6 |
| Oxidation states | [-1, 1] | [-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7] |
| Electronegativity (Pauling) | 2.2 | 1.83 |
| Electron affinity | 0.75419 eV | 0.151 eV |
| Density | 0.08988 kg/m³ | 7874 kg/m³ |
| Melting point | -259.34 °C | 1537.85 °C |
| Boiling point | -252.87 °C | 2860.85 °C |
| Discovery year | 1766 | N/A |