Bromine is element 35, a halogen of the p block, in group 17, period 4. Its ground-state configuration is [Ar] 3d10 4s2 4p5, and it usually shows the oxidation states -1, 0, 1, 5, 7.
It was discovered in 1826, by Balard.
Name origin: the Greek bromos, 'stench'.
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