In chemistry, the perbromate ion is the anion having the chemical formula {Chem|BrO|4|-}. It is an oxyanion of bromine, the conjugate base of perbromic acid, in which bromine has the oxidation state +7. Unlike its chlorine and iodine analogs (perchlorate and periodate), it is difficult to synthesize. It has tetrahedral molecular geometry. The term... Found on http://en.wikipedia.org/wiki/Perbromate