Question

Write the general characteristics of the elements of group 7.

Answer 1

1. They are highly reactive nonmetals.
2. All show seven electrons in their outermost shell.
3. They exist in diatomic molecules (e.g., F₂, Cl₂).
4. Reactivity decreases down the group.
5. They have high electronegativity and electron affinity.
6. They form salts called halides when reacting with metals.
7. Their physical states differ: fluorine and chlorine are gases, bromine is a liquid, and iodine is a solid.