How many molecules have the same type of shape from the following molecules?
H3O+, NH3, ClO−3, PH3, H2O, ¯CH3
For shape, we only consider the bond pairs but not the lone pairs.
In H2O, 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!