The element oxygen has two molecular forms:
O2 for 'plain' oxygen gas and O3 for ozone
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An oxygen molecule, O2, consists of two oxygen atoms bonded together by a double covalent bond. It is a colorless and odorless gas that is essential for respiration in living organisms and plays a key role in many chemical reactions. Due to its high reactivity, oxygen is involved in oxidation processes and the formation of oxides.
There are 2 oxygen atoms in 1 molecule of oxygen.
Oxygen is an element. The oxygen in our atmosphere typically combines with itself, as does the nitrogen, forming a diatomic molecule--O2. So the two atoms in a molecule of oxygen would both be oxygen atoms.
Most oxygen molecules are composed of two atoms of oxygen, and we frequently refer to oxygen as O2 (or O2) for this reason. Oxygen can also exist as the molecule called ozone, which is O3. Ozone is unstable, and will revert to O2 in a few minutes.
An oxygen molecule (O2) has a total of 16 electrons, with each oxygen atom contributing 8 electrons.
there is one atom of oxygen in Carbon monoxide (CO) i.e. half molecule of oxygen.