Oxygen vs Cadmium
| Property | O Oxygen | Cd Cadmium |
|---|---|---|
| Atomic number | 8 | 48 |
| Symbol | O | Cd |
| Name | Oxygen | Cadmium |
| Category | nonmetal | transition-metal |
| Standard Atomic Weight | 15.9994 u | 112.414 u |
| Period | 2 | 5 |
| Group | 16 | 12 |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [He]2s22p4 | [Kr]5s24d10 |
| Oxidation states | [-2, -1, 0, 1, 2] | [-2, 1, 2] |
| Electronegativity (Pauling) | 3.44 | 1.69 |
| Electron affinity | 1.4611 eV | -0.7 eV |
| Density | 1.429 kg/m³ | 8690 kg/m³ |
| Melting point | -218.79 °C | 321.07 °C |
| Boiling point | -182.95 °C | 766.85 °C |
| Discovery year | 1771 | 1817 |