Oxygen vs Silicon
| Property | O Oxygen | Si Silicon |
|---|---|---|
| Atomic number | 8 | 14 |
| Symbol | O | Si |
| Name | Oxygen | Silicon |
| Category | nonmetal | metalloid |
| Standard Atomic Weight | 15.9994 u | 28.085 u |
| Period | 2 | 3 |
| Group | 16 | 14 |
| Block | p | p |
| Phase at STP | gas | solid |
| Electron configuration | [He]2s22p4 | [Ne]3s23p2 |
| Oxidation states | [-2, -1, 0, 1, 2] | [-4, -3, -2, -1, 0, 1, 2, 3, 4] |
| Electronegativity (Pauling) | 3.44 | 1.9 |
| Electron affinity | 1.4611 eV | 1.385 eV |
| Density | 1.429 kg/m³ | 2329.6 kg/m³ |
| Melting point | -218.79 °C | 1413.85 °C |
| Boiling point | -182.95 °C | 3264.85 °C |
| Discovery year | 1771 | 1824 |