Bromine is not a gas at room temperature. It exists in the liquid state at room temperature. In fact, it is the only non-metallic element to exist in the liquid state at room temperature.
Bromine is a chemical element with a melting point of 19 degrees Fahrenheit, and a boiling point of 140 degrees Fahrenheit.
Since room temperature is approximately 70 degrees Fahrenheit, room temperature lies between the melting and boiling points of bromine, causing bromine to exist in the liquid state. At this temperature, bromine exists as a slightly transparent, reddish-brown liquid, and emits fumes that can cause irritation.