Argon vs Nickel
| Property | Ar Argon | Ni Nickel |
|---|---|---|
| Atomic number | 18 | 28 |
| Symbol | Ar | Ni |
| Name | Argon | Nickel |
| Category | noble-gas | transition-metal |
| Standard Atomic Weight | 39.948 u | 58.6934 u |
| Period | 3 | 4 |
| Group | 18 | 10 |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Ne]3s23p6 | [Ar]4s23d8 |
| Oxidation states | [0] | [-2, -1, 0, 1, 2, 3, 4] |
| Electronegativity (Pauling) | N/A | 1.91 |
| Electron affinity | -1 eV | 1.156 eV |
| Density | 1.7837 kg/m³ | 8912 kg/m³ |
| Melting point | -189.35 °C | 1454.85 °C |
| Boiling point | -185.85 °C | 2912.85 °C |
| Discovery year | 1894 | 1751 |