Question

The valency of all metals is considered as _______

Answer 1

loose of electrons or gain of electrons.

Explanation:

it is also depend upon the atomic number of different elements.

For example :-

sodium have 11 atomic number

configuration of sodium is 2,8,1

As element always want to stable, so it follow octet rule

That's why it's loose 1 electron

And it's valency is 1.