Question

what is valency?how can we calculate it​

Answer 1

To calculate the valency of an element(or molecule, for that matter), there are multiple methods. ... The valency of an atom is equal to the number of electrons in the outer shell if that number is four or less. Otherwise, the valency is equal to eight minus the number of electrons in the outer shell.

Answer 2

Hey!

Combining capacity of an atom is Known as valency.

The valency is equal to number of electrons if number of electrons in the outermost shell is four or less.

Or, the valency is equal to eight minus number of electrons in outermost shell.

Hope this helps ✌✌