Question

tell me the atomic number from 1 to 10.

Answer 1

1 - hydrogen(H)
Valency-1
2-helium(He)
Valency-0
3-lithium(Li)
Valency-1
4-beryllium(Be)
Valency-2
5-boron(B)
Valency-3
6-carbon(C)
Valency-4
7-nitrogn(N)
Valency-3
8-oxygen(O)
Valency-2
9-fluroinr(F)
Valency-1
10-neon(Ne)
Valency -0
Hope this will help you..