Question

i. Write down two Lewis structures for ozone.

ii. How are these two Lewis structures related to each other?

iii. What are these two Lewis structures called?

Answer 1

i. Lewis structures of ozone can be shown as follows :

ii. In these two Lewis structures, 

The position of the atoms is same but the position of pair of electrons (or formal charge) is different.

These two Lewis structures are considered equivalent to each other.

iii. These two Lewis structures are called as resonating or contributing or canonical structures.