What is ozone?
Ozone is an inorganic molecule also known as trioxygen. It means one molecule of ozone is made of 3 oxygen atoms.
It is a pale blue gas with a distinctive pungent smell. It is an allotrope of oxygen that is much less stable than the diatomic allotrope, breaking down in the lower atmosphere to diatomic oxygen.
It is formed from dioxygen, by the action of UV light and atmospheric electrical discharges. It is present in low concentrations through out the Earth's atmosphere.