Question

Astatine is the last element in halogen group $\left(VII\right)$. It is expected to be:

• A. more electronegative than iodine
• B. composed of diatomic molecules
• C. limited to an oxidation number of -1 in its compounds
• D. a solid at room temperature

Answer 1

The correct option is D a solid at room temperature

As we move down the group, molar mass and forces increases so elements exists in solid state.
So iodine and astaline are solid at room temperature.