'O₂' originates from the chemical symbol for oxygen, derived from the Greek word 'oxys,' meaning 'sharp,' and 'genes,' meaning 'producer,' referring to the formation of acids.

'O₂' was identified as a distinct element in the late 18th century by scientists like Joseph Priestley and Antoine Lavoisier.

Initially, it was recognized as a component of air, but over time it evolved into its current understanding as a vital element for life and combustion.