Bromine is a chemical element with symbol Br and atomic number 35. It is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas.

Atomic Weight:  79.904
Density:        3.12 g/cm3
Melting Point:  -7.3 °C
Boiling Point:  59 °C