Question #ffc2c

1 Answer
Simon Moore
Apr 25, 2017

Element.

Explanation:

Ozone is #O_3#, so it is an allotrope of oxygen (which predominantly exists as #O_2#). However, whether existing in the form of molecular oxygen (#O_2#) or ozone (#O_3#), it is still an element, as it contains only one type of atom.

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