Question

Valency of the elements in the halogen is

Answer 1

Answer:

Valency of any element depends upon the number of required to complete its octet or number of maximum bond formed by the element .

Like Cl a halogen have valency 1 form only one bond .

Oxygen have valency - 2

Answer 2

Valency lavel of the elements in the halogen group is one.

Halogens belong to group `17 of periodic table and their general electronic configuration is  ns 2   np5  .So, they have a tendency to accept one electron to get noble gas configuration.