| Attribute | Value |
|---|---|
| Symbol | O |
| Standard state | Gas |
| Atomic mass | 15.999 u |
| Electron configuration | [He]2s²2p⁴ |
| Oxidation states |
|
| Electronegativity (pauling scale) | 3.44 |
| Atomic radius (van der waals) | 152 pm |
| Ionization energy | 13.618 eV |
| Electron affinity | 1.461 eV |
| Melting point | 54.36 K |
| Boiling point | 90.2 K |
| Density | 0.001429 g/cm³ |
| Atomic number | 8 |
| Group name | Nonmetal |
| Discovered | 1774 year |