Br - Bromine

Bromine

 Bromine 
Br
Atomic Number: 35
Atomic Weight: 79.904
Element Type: Halogen
Crystal Structure: Orthorhombic
Melting Point: -7.2°C = 19.04°F = 265.95 K
Boiling Point: 58.8°C = 137.84°F = 331.95 K
Critical Temp: 315.0°C = 599.0°F = 588.15 K
Atomic Radius: 1.12 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 1.14 Å
Electronegativity: 2.96

History

(Gr. bromos, stench) Discovered by Balard in 1826, but not prepared in quantity until1860.


Sources

A member of the halogen group of elements, it is obtained from natural brines fromwells in Michigan and Arkansas. Little bromine is extracted today from seawater, whichcontains only about 85 ppm.