Hydrogen vs Chromium
| Property | H Hydrogen | Cr Chromium |
|---|---|---|
| Atomic number | 1 | 24 |
| Symbol | H | Cr |
| Name | Hydrogen | Chromium |
| Category | nonmetal | transition-metal |
| Standard Atomic Weight | 1.007975 u | 51.9961 u |
| Period | 1 | 4 |
| Group | 1 | 6 |
| Block | s | s |
| Phase at STP | gas | solid |
| Electron configuration | 1s1 | [Ar]3d54s1 |
| Oxidation states | [-1, 1] | [-4, -2, -1, 0, 1, 2, 3, 4, 5, 6] |
| Electronegativity (Pauling) | 2.2 | 1.66 |
| Electron affinity | 0.75419 eV | 0.675 eV |
| Density | 0.08988 kg/m³ | 7150 kg/m³ |
| Melting point | -259.34 °C | 1906.85 °C |
| Boiling point | -252.87 °C | 2670.85 °C |
| Discovery year | 1766 | 1797 |