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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.





Science Quote

'The most precious things in life are not those one gets for money.'

Albert Einstein
(1879-1955)


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