Which of the following elements is NOT a Halogen group element?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. Graphene.
Graphene is not a halogen group element. Halogens belong to Group 17 of the periodic table and include chlorine, iodine, and astatine, all of which are non-metals or metalloids with similar chemical properties. In contrast, graphene is an allotrope of carbon, consisting of a single layer of carbon atoms arranged in a hexagonal lattice. It is not an element but a form of carbon, and it doesn’t belong to the halogen group or show halogen-like behaviour.