* Bromine (Br₂) exists as a liquid at room temperature. Liquids have a higher density than gases, and their molecules are closer together.
* Bromine vaporizes at 59 °C (138 °F), forming a gas. Gases have much greater distances between molecules compared to liquids.
* Bromine can also exist as a solid. Solids have the most closely packed molecules.
Therefore, the correct order of bromine phases from increasing distance between molecules is:
Solid Bromine -> Liquid Bromine -> Gaseous Bromine
