Atomic symbol: O
Atomic number: 8
Atomic mass: 16.00
Appearance: colorless gas at 25°C
Series: Reactive nonmetals
Electron configuration: 1s²2s²2p⁴
Third most abundant element in the universe, after hydrogen and helium.
Readily forms oxides with most other elements and compounds.
Fun Fact! Liquid and solid oxygen occur in a variety of colours, suc as pale blue, red, pink, orange, and black.