Question

How is the valency of an element determined if the number of electrons in the outermost shell is close to its full capacity?

Answer 1

JUST SUBTRACT THE NUMBER OF ELECTRONS FROM 8 U WILL GET

ONLY IF THE NMBER IS GREATER THAN 4

Answer 2

Explanation:

When the number of electrons in the outermost shell of an atom is close to its full capacity, i.e., 5, 6 or 7 then the valency is equal to the number of electrons by adding which the shell may become complete or 8 minus valence electrons.