Question

Write five characteristic properties of halogens.

Answer 1

1. Halogens are highly reactive non-metals.
2. They have seven valence electrons.
3. They generally form −1 ions by gaining one electron.
4. They exist as diatomic molecules, such as F₂​, Cl₂​, Br₂​ and I₂​.
5. They are strong oxidising agents, with oxidising power decreasing down the group.