Question

the valency of the elements of period​

Answer 1

Answer:

On moving from left to right in a period, the number of valence electrons decreases from 8 to 1. - As a result, valency across a period first increases and then decreases. - Valency increases from +1, +2, +3 till +4 in a period and then decreases -4, -3, -2, -1, 0.

Answer 2

Explanation:

On moving from left to right in a period, the number of valence electrons decreases from 8 to 1. - As a result, valency across a period first increases and then decreases. - Valency increases from +1, +2, +3 till +4 in a period and then decreases -4, -3, -2, -1, 0.