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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.
Using the oxidation numbers of the the atoms that constitute the sulfate ion that has a formula of SO4, the oxidation state is determined by adding the oxidation number of sulfur and oxygen.Sulfur has an oxidation number of 6, or it loses 6 atoms when it forms a chemical compound.Oxygen atoms on the other hand accept 2 electrons each when they form a compound. The sulfate anion has a formula of SO4, this gives a net oxidation state of +6 + 4*(-2) = -2.osted on. (Answer #1). The oxidation number refers to the charge on the central atom of a compound when the ligands attached to it are removed and so are the atoms that associated with the ligand. For the sulfate anion it is the oxidation state that can be determined not the oxidation number.