Question

Can valency also be defined as the number of electrons donated, shared or taken by an atom to attain stablity?

Answer 1

Yes,valency is defined as the combining capacity of an atom to gain. lose or share electrons with other atoms to form compounds.

The electrons present in the last shell determine the valency of a particular element.

If,

• Number of valence electrons ≤4: valency = number of valence electrons
• Number of valence electrons >4: valency = 8 - number of valence electrons