Question

How many molecules have the same type of shape from the following molecules?
$H_3{O}^{+},N{H}_3,Cl{O}_3^{-},P{H}_3,H_{2}O,\overline{C}{H}_3$ ___

Answer 1

For shape, we only consider the bond pairs but not the lone pairs.
In $H_{2}O$, the oxygen atom has two ligands and two lone pairs.

Thus its shape is bent.
Except water, all the other central atoms have 3 ligands.

So 5 in all!