Argon vs Cadmium
| Property | Ar Argon | Cd Cadmium |
|---|---|---|
| Atomic number | 18 | 48 |
| Symbol | Ar | Cd |
| Name | Argon | Cadmium |
| Category | noble-gas | transition-metal |
| Standard Atomic Weight | 39.948 u | 112.414 u |
| Period | 3 | 5 |
| Group | 18 | 12 |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Ne]3s23p6 | [Kr]5s24d10 |
| Oxidation states | [0] | [-2, 1, 2] |
| Electronegativity (Pauling) | N/A | 1.69 |
| Electron affinity | -1 eV | -0.7 eV |
| Density | 1.7837 kg/m³ | 8690 kg/m³ |
| Melting point | -189.35 °C | 321.07 °C |
| Boiling point | -185.85 °C | 766.85 °C |
| Discovery year | 1894 | 1817 |