Oxygen vs Fluorine
| Property | O Oxygen | F Fluorine |
|---|---|---|
| Atomic number | 8 | 9 |
| Symbol | O | F |
| Name | Oxygen | Fluorine |
| Category | nonmetal | halogen |
| Standard Atomic Weight | 15.9994 u | 18.998403 u |
| Period | 2 | 2 |
| Group | 16 | 17 |
| Block | p | p |
| Phase at STP | gas | gas |
| Electron configuration | [He]2s22p4 | [He]2s22p5 |
| Oxidation states | [-2, -1, 0, 1, 2] | -1 |
| Electronegativity (Pauling) | 3.44 | 3.98 |
| Electron affinity | 1.4611 eV | 3.4011 eV |
| Density | 1.429 kg/m³ | 1.696 kg/m³ |
| Melting point | -218.79 °C | -219.62 °C |
| Boiling point | -182.95 °C | -188.12 °C |
| Discovery year | 1771 | 1886 |