Question

what is the difference between valency and oxidation number??​

Answer 1

1. Valency is the maximum no. of electrons which an atom can lose or gain while oxidation no. is the actual no. of electrons which the element lose or gain to form a molecule.

Answer 2

#  Valency : Number of electrons required to complete outermost shell.

#  Oxidation number : Number of electrons shared or transferred in forming molecules or compounds.