Ozone is formed when _______. a. two oxygen molecules combine b. an individual oxygen atom combines with an oxygen molecule c. u
ltraviolet radiation breaks apart four oxygen molecules d. oxygen molecules are broken into separate atoms
2 answers:
Yea the answer would be B
Answer: b. an individual oxygen atom combines with an oxygen molecule
Explanation:
Molecules of an element is a pure substance which is composed of atoms of similar elements. Example: 
Atom is the smallest entity of a matter which has its independent existence.

Ozone is a molecule of oxygen which contains 3 oxygen atoms and hence is formed by the combination of a molecule of oxygen and a atom of oxygen.
Hence the correct option is b.
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