the oxidation number of bromine in bromine gas is _____.
Similarly, the oxidation number of an atom has got nothing to do with how electrons may or may not be shared in a bond. Bromine gas is an element and its molecule is Br2 or it can be represented as Br-Br. All elements have oxidation number zero. As both atoms have same electronegativety so when the bonded electrons are distributed none of the atom get any extra electron or looses any electron . So net formal charge is 0 (zero). trikha Â· 8 years ago.