Question

an atom has 5 electrons in the outermost M shell what is the valency of this element find the atomic number and write the electronic configuration of the same​

Answer 1

Explanation:

The valency of this atom would be 3

It's atomic number would be 15

and it's electronic configuration would be:

K L M

2 8 5.

Hope it will help you.

Answer 2

VALENCY = 8-5 =3

ATOMIC NUMBER=15

ELECTRONIC CONFIGURATION

2,8,5