Bromine is a chemical element with the symbol Br, and atomic number of 35. It is in the halogen group (17). The element was isolated independently by two chemists, Carl Jacob Löwig and Antoine Jerome Balard, in 1825–1826. Elemental bromine is a fuming red-brown liquid at room temperature, corrosive and toxic, with properties between those of chlorine and iodine. Free bromine does not occur in nature, but occurs as colorless soluble crystalline mineral halide salts, analogous to table salt.Symbol: Br
Atomic number: 35
Electron configuration: [Ar] 3d10 4s2 4p5
Boiling point: 58.8 °C
Atomic mass: 79.904 ± 0.001 u
Discoverers: Antoine Jérôme Balard, Leopold Gmelin