Oxygen
Oxygen (O) is a chemical element belonging to the category Non-metal, with atomic number 8 and standard atomic mass 15.9990 u. This sheet describes its fundamental properties, periodic position and physical characteristics.
Identity
- Name: Oxygen
- Symbol: O
- Atomic number: 8
- Atomic mass: 15.9990 u
Position in the periodic table
- Group: 16
- Period: 2
- Category: Non-metal
Physico-chemical properties
- Standard state: Gas
- Melting point: -218.8 °C
- Boiling point: -183.0 °C
- Density: 1.429 g/L (0 °C, 1 atm)
- Electron configuration: 1s² 2s² 2p⁴
Scientific description
Oxygen is a chemical element with symbol O and atomic number 8. It belongs to the category of Non-metal and occupies group 16 and period 2 in the periodic table. Its standard atomic mass is 15.9990 u. At standard conditions, it is a diatomic gas (O₂).
KODO: G8