| General |
|---|
| Name | Oxygen | | Symbol | O | | Number | 8 | | Chemical series | Other nonmetals | | Group / Period | 16 / 2 | | Block | p-block | | CAS registry number | 7782-44-7 |
| Physical properties |
|---|
| State | gas | | Density | 1.429 g/L | | Melting point | 54.36 K (-218.79 °C, -361.82 °F) | | Boiling point | 90.20 K (-182.95 °C, -297.31 °F) | | Critical point | 154.59 K, 5.043 MPa |
| Atomic properties |
|---|
| Atomic Weight | 15.9994 g/mol | | Crystal structure | cubic | | Electronegativity | 3.44 | | Atomic radius | 60 pm | | Atomic radius (calculated) | 48 pm | | Electron configuration | [He] 2s2 2p4 | | Electrons per shell | 2, 6 | | Number of protons | 8 | | Number of neutrons | 8 |
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Fluorine