Question

1 to 20 elements valency numbers

Answer 1

Answer:

hydrogen

helium - 2

lithium - 1

berrylium - 2

boron - 3

carbon - 4

nitrogen - 3

oxygen - 2

florine - 1

neon

sodium - 1

magnesium - 2

aluminium - 3

silicon - 4

phosphorus - 3

sulphur - 2

chlorine - 1

argon

potassium - 1

calcium - 2

hope it helps you

Answer 2

Valency of 1 to 20 elements

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