Question

Explain the shapes of $A{X}_3$ type molecules without any lone pairs, with one lone pair, and with two lone pairs.

Answer 1

$A{X}_3$ - (no lonepairs) - $s{p}^2$ hybridisation, trigonal planar shape.
$A{X}_3$ - (one lonepairs) - $s{p}^3$ hybridisation, pyramidal shape.
$A{X}_3$ - (two lonepairs) - $s{p}^3$ d hybridisation, distorted trigonal bipyramidal shape.