Bromine is a chemical element with the symbol Br and atomic number 35. It is a member of the HALOGEN group, which also includes chlorine, fluorine, and iodine. Bromine is a LIQUID at room temperature, making it the only non-metallic element that is LIQUID under standard conditions. It is also a halide, meaning it has a negative charge due to the presence of an extra electron. Bromine is classified as a HALOGEN, which are elements that form compounds by gaining one or more electrons.