Question

How does valency of an element vary in periods

Answer 1

Explanation:

the valency of the element vary in periods by number of electron in outtermost shell

example 1A group has valency 1

Answer 2

the number of electrons that must be lost or gained by an atom to obtain a stable electron configuration.

In the periodic table period, the valency of an element first increases and then decreases.

There are 8 elements in a single period of the modern periodic table, except the transition metals as they exhibit variable valencies.

The valency varies from +1 to +4 or -4 through these 8 elements, in the first 4 elements of these 8 elements....