Question

what is the valency of first 30 elements ​

Answer 1

Answer:

H- 1

He-0

Li-1

Be-2

B-3

C-4

N-3

O-2

F-1

Ne-0

Na-1

Mg-2

Al-3

Si-4

P-3

S-2

Cl-1

Ar-0

K-1

Ca-2

Answer 2

1. Hydrogen = -1,+1
2. Helium=0
3. Lithium=+1
4. Beryllium=+2
5. Boron=-3,+3
6. Carbon=+2,+4
7. Nitrogen=-3,-2,-1,(+1),+2,+3,+4,+5
8. Oxygen=-2
9. Fluorine=-1,(+1)
10. Neon=0