Question

How many resonance structures can be drawn for ozone?

Answer 1

Two resonance structures are available, each with formal charges on the oxygen atoms.

Explanation:

There are 18 valence electrons. This is to be distributed over 3 oxygen centres: `O=O^(+)-O^-`. From left to right, each `O` atom has 6, 5, and 7 valence electrons, resulting in formal charges of `0`, `+1`, and `-1`, for each atom. VSEPR predicts a bent molecule.