oxygen

nitrogen${\displaystyle \longleftarrow }$ 8 ${\displaystyle \longrightarrow }$fluorine

The Simple English Wikipedia has an article on:

Oxygen

Pronunciation

• enPR: ŏk'sĭjən, IPA ^(key): /ˈɒksɪdʒən/

• Audio (US)

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• Hyphenation: ox‧y‧gen

Noun

Singular oxygen

Plural oxygens

1. (uncountable) Oxygen is a chemical element (symbol O) with an atomic number of 8.
2. (uncountable) Oxygen is a type of gas, which is needed for breathing.
3. (countable) An oxygen is an atom of the element oxygen.