Calculate the oxidation number of sulphur, chromium and nitrogen in respectively.
Oxidation state: The oxidation state, also known as the oxidation number in chemistry, is the hypothetical charge of an atom if all of its bonds to other atoms were entirely ionic.
Part 1: Calculating the oxidation state of Sulphur () in
Part 2: Calculating the oxidation state of Chromium () in
Part 3: Calculating the oxidation state of Nitrogen () in