Here's why:
* Halogens: The halide family, also known as the halogens, are a group of non-metallic elements in the periodic table. They include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
* States of Matter: The state of matter (solid, liquid, or gas) for these elements is determined by their intermolecular forces.
* Bromine's Unique Property: Bromine has a relatively weak intermolecular force, which allows it to be liquid at room temperature.
The other halogens are gases (fluorine and chlorine) or solids (iodine and astatine) at room temperature.
