Br - Bromine

Bromine

Bromine

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.

'If one wishes to obtain a definite answer from Nature one must attack the question from a more general and less selfish point of view.'

Max Planck
(1858-1947)