Well the halogens have dispersion forces as the only intermolecular force of attraction. Solids may be crystalline. Intermolecular Forces Gaya Antarmolekul Br 2 is a liquid and I 2 is a solid reflecting stronger attractive forces. . The boiling points of the halogens increase in the order F2. Why should iodine be a solid. Complete the balanced chemical reaction for the following weak base with a strong acid. Solids have strong intermolecular forces. As written all of these halogens are bimolecular and they are respectively room temperature SOLID GAS and LIQUID And so tentatively we would suggest that diiodine has the strongest intermolecular forceand NOTE we speak of the force between molecules not the INTRAMOLECULAR force ie. Trends in observed melting and boiling points for the halogens clearly demonstrate this effect as seen in. Hence ethanol would have a lower boiling point than 12-ethanediol but ethan...