Question

Valency and valence electrons of first 20 elements​

Answer 1

Answer:

Valency of first 20 elements is given below.

• Hydrogen (H) = 1.

• Helium (He) = 0.

Helium (He) = 0. •Lithium (Li) = 1.

• Beryllium (Be) = 2.

• Boron (B) = 3.

•Carbon (C) = 4.

• Nitrogen = 3• Oxygen = 2

• Fluorine = 1

•Neon= 0

• Sodium= 1

• Magnesium= 2

•Aluminium= 3

•Silicon= 4

• Phosphorus= 3

•Sulphur= 2

• Chlorine= 1

• Argon= 0

• Potassium = 1

•Calcium = 2