what is bromine
Bromine. Bromine is an element that belongs to the same group as chlorine and iodine. In its pure state, bromine is a reddish-orange liquid that gives off an unpleasant odor, but in nature it combines with other substances to form a salt.romine. Bromine is an element that belongs to the same group as chlorine and iodine. In its pure state, bromine is a reddish-orange liquid that gives off an unpleasant odor, but in nature it combines with other substances to form a salt.