Question

Which of the following is the correct decreasing order of the elements: Iodine (volatile solid), Bromine (brown liquid) and Chlorine (greenish yellow gas) in terms of force of attraction between their atoms.

• A. Iodine, Bromine, Chlorine
• B. Bromine, Iodine, Chlorine
• C. Iodine, Chlorine, Bromine
• D. Bromine, Chlorine, Iodine

Answer 1

The correct option is A

Iodine, Bromine, Chlorine

The particles of a solid (Iodine) are tightly packed and thus have the highest force of attraction between them. The molecules of a gas (Chlorine) are free to move in any direction, and thus have the lowest force of attraction between them.
So the correct decreasing order will be: Iodine (solid), Bromine (liquid), Chlorine (gas).