This article has been reviewed and approved by the following Topic Editor: Sidney Draggan (other articles)
Bromine is a reddish-brown fuming liquid at room temperature, one of only a few elements which is liquid. Bromine liquid has a very strong, irritating odor, and is reactive and rather poisonous. Its atomic number is 35 and chemical symbol is Br.
Bromine is one of the four halogen elements, which are chemically related and show a systematic progression of physical and chemical properties. The other halogens are: fluorine, an extremely reactive gas; chlorine, a reactive, heavy gas; iodine, a relatively inactive solid; and astatine.