Question

Write the electronic configuration of an element whose mass number is 31and atomic number is 15. What is its valency?

Answer 1

hey !!!

here is ur answer!!!

mass no = 31
atomic no = 15
Element name = phosphorus
group : group fifteen
valancy : 3
period no : 3...

elctronic configuration : 2,8,5.....

hope this helps u

Answer 2

Given,:mass number:31,Atomic number: 15
Electronic configuration: 2,8,5
Valency:3