Question

what is the valency of phosphorus.. is it 3 or 5 ...I want deep explanation​

Answer 1

Answer:

Phosphorus(Atomic no. 15) has its electrons arranged in a configuration of 2,8,5. ... So one can either add 3 electrons to the outer orbit or take away 5 electrons with equal ease. So Phosphorus has a valency of 3 and 5 both

Answer 2

Answer:

The valency of an element is a measure of its combining capacity and can be defined as

Explanation:

so it's atomic number is 15 and valency is 3