Aluminum vs Argon
| Property | Al Aluminum | Ar Argon |
|---|---|---|
| Atomic number | 13 | 18 |
| Symbol | Al | Ar |
| Name | Aluminum | Argon |
| Category | post-transition-metal | noble-gas |
| Standard Atomic Weight | 26.981538 u | 39.948 u |
| Period | 3 | 3 |
| Group | 13 | 18 |
| Block | p | p |
| Phase at STP | solid | gas |
| Electron configuration | [Ne]3s23p1 | [Ne]3s23p6 |
| Oxidation states | [-2, -1, 0, 1, 2, 3] | [0] |
| Electronegativity (Pauling) | 1.61 | N/A |
| Electron affinity | 0.4328 eV | -1 eV |
| Density | 2700 kg/m³ | 1.7837 kg/m³ |
| Melting point | 660.287 °C | -189.35 °C |
| Boiling point | 2518.85 °C | -185.85 °C |
| Discovery year | 1825 | 1894 |