Question

What is the valency of halogens ?

• A. 7
• B. 3
• C. 1
• D. 4

Answer 1

The correct option is C

1

Step 1:

The combining capacity of an element with other elements is called the valency of an element.

The number of electrons present in the outermost shells is related to their valency.

Step 2:

Halogens are present in group 17. Group 17 elements have 7 electrons in their outermost shell.

A halogen atom can receive an electron from another atom of a different element, both the atoms will form a very stable compound to complete their outermost shells.

Therefore, the valency of halogens is one.

Final answer:

Hence, option (C) is the correct option.