Question

1. How will you find the valency
of chlorine, sulphur and
magnesium?
Atomic Number and Mass
Number​

Answer 1

Explanation:

the number of electrons in the outermost shell of the atom of an element is less than or equal to 4, then the valency of the element is equal to the number of electrons in the outermost shell.

Valency of chlorine=8-7=1

Valency of sulphur=8-6=2

Valency of magnesium=2