Question

What is the Lewis structure of ozone?

Answer 1

`18` `e^-`, to distribute around 3 atoms of oxygen. VSEPR would predict a bent structure, a formally positive central atom, and a formally negative terminal atom.

Explanation:

`O=stackrel(+)O-O^-`. From left to right, around each `O` atom there are 6, 5, and 7 valence electrons, resulting in formal charges of `0`, `+1`, and `-1` respectively. Of course, I can draw the resonance structure with the negative charge on the LH `O` atom. Because there are 3 regions of electron density around the central `O` atom, (the double bond, the lone pair, and the single bond), we would predict a bent structure, with an `O-O-O` bond angle of a bit less than `120^@` around the central oxygen atom.

Here is a link that may help. (I assume it's public domain!).