Linked from
The 93 pages that link to Oxygen, each with the reason it gives.
MoleculeBroader topic: It shows that a molecule can consist of atoms of one element.
Zinc oxideBroader topic: Oxygen supplies the O²⁻ ions that balance zinc’s charge in ZnO.
Diatomic moleculeBroader topic: Ground-state O₂ is a diatomic molecule with two unpaired electrons.
Potassium bromateBroader topic: Three oxygen atoms surround bromine in the bromate ion.