Question

Why valency is first increase then decrease across the period

Answer 1

Answer:

Explanation:

Valency of metal is no. Of valence electron in outer most shell

No. Of electrons increase on going to right of table so valency first increases.

As non metallic character increase valency became the capacity of gaining electron

So ,it decreases again as more the no. Subtracted from 8 lower the value or valency

Mark as brainiest...................