Question

How will you find the valency
of chlorine, sulphur and
magnesium?​

Answer 1

Answer:

Mathematically we can say that if the outermost shell of an atom contains 4 or less than 4 electrons, then the valency of an element is equal to the number of electrons present in the outermost shell and if it is greater than 4, then the valency of an element is determined by subtracting the total number of electrons

Hence the valency of Cl, S, and Mg are 1, 2, 2 respectively.