Preparation of O2 in the laboratory

Heating of chlorate (reaction)

Thermal decomposition of metals low in the electrochemical series or higher oxides of some metals
(reaction)

Decomposition of hydrogen peroxide
(reaction)

Large scale preparation of dioxygen

Industrial preparation of dioxygen

How do marine and aquatic life get oxygen?

Temperature at which O2 liquefies and freezes

Isotopes of O

Why is molecular oxygen unique?

Reactivity of dioxygen

How does it sustain reactions with other elements?

Why is external heating required for initiating an oxidation reaction?

Reaction with metals

Reaction with non-metals

Reaction with compounds

Catalytic oxidation reactions