Why the oxidation number of oxygen is 2 July 8, 2019 16 32 64 128 Why the oxidation number of oxygen in of2 is 2 The oxidation number of oxygen is 2 except The oxidation number of oxygen is generally 2 because it has Oxidation number h2o2 Oh oxidation number Oxidation number of sulfur in h2so4 S2o8 2- oxidation number