Consider the following table: | Total number of electron pairs (l.p

CHEMISTRY · Subjective · A Level · Chemistry · Bonding · Bonding

Problem

Consider the following table:

Total number of electron pairs (l.p. + $\sigma$ -bond)	Total number of lone pairs	Shape
$5$	$p$	Linear
$q$	$1$	See-saw
$4$	$r$	Bent shape
$s$	$2$	Square planar
$5$	$t$	T-shaped

Calculate the value of

p+q+r-s-t