Question

How to find Valency, Periodic Table of an element??​

Answer 1

$\bf\large\underline\blue{Answer:-}$

The valency of an atom is equal to the number of electrons in the outer shell if that number is four or less. Otherwise, the valency is equal to eight minus the number of electrons in the outer shell. Once you know the number of electrons, you can easily calculate the valency.

Answer 2

Explanation:

the valance electron in th outer most shell of the atom