Question

Atomic number of few elements are given below: 12,13,14,18 show the electronic configuration for these elements and determine the valency of each of these elements

Answer 1

12-2,8,2 valency 2
13-2,8,3 valency 3
14-2,8,4 valency 4
18-2,8,8 valency 0

Answer 2

12=2,8,2, 13=2,8,3 14=2,8,4, 18=2,8,8,
2,3,4,0 are the valency