Hydrogen vs Nickel
| Property | H Hydrogen | Ni Nickel |
|---|---|---|
| Atomic number | 1 | 28 |
| Symbol | H | Ni |
| Name | Hydrogen | Nickel |
| Category | nonmetal | transition-metal |
| Standard Atomic Weight | 1.007975 u | 58.6934 u |
| Period | 1 | 4 |
| Group | 1 | 10 |
| Block | s | s |
| Phase at STP | gas | solid |
| Electron configuration | 1s1 | [Ar]4s23d8 |
| Oxidation states | [-1, 1] | [-2, -1, 0, 1, 2, 3, 4] |
| Electronegativity (Pauling) | 2.2 | 1.91 |
| Electron affinity | 0.75419 eV | 1.156 eV |
| Density | 0.08988 kg/m³ | 8912 kg/m³ |
| Melting point | -259.34 °C | 1454.85 °C |
| Boiling point | -252.87 °C | 2912.85 °C |
| Discovery year | 1766 | 1751 |