Question

What do you mean by valency of an atom? Write the valencies of sodium, chlorine,

magnesium? (Atomic number for Cl=17, Na=11, Mg=12). ​

Answer 1

Explanation:

Valency is the combining power of an element. The valency of an element is related to how many electrons are in the outer shell.

Answer 2

Explanation:

Chlorine-1

Magnisium-2

Sodium-1

Hope this will help you Hari