Question

is meant by valency of an element what is the relationship between the number of Valence Electrons and valency

Answer 1

Valency is the combining capacity of an element.
The no. of valence electrons= valency

Answer 2

Valencey is the number of atoms present in a molecule.The higher valnce is denoted by 'ic' and lower by 'ous'. The valencey of metals is their group number,for non metals the valancey is " group number - 8".