Question

explain about valency​

Answer 1

Answer:

In chemistry, the valence or valency of an element is the measure of its combining capacity with other atoms when it forms chemical compounds or molecules.

Answer 2

Answer:

$valency \: is \: the \: number \: of \: elecrons \: needed \: by \: an \: atom \: to \: complete \: the \: state \: of \: octet \: in \: its \: outermost \: shell$