In which compound does manganese have the highest oxidation state? A)Mn B)Mn₂O₃ C)KMnO₄ D)MnO₂ E)none of the above

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In KMnO4, manganese has the highest oxidation state (+7) because oxygen has an oxidation state of -2 and potassium has an oxidation state of +1, so the oxidation states must add up to the overall charge of -1 for the compound. In Mn, manganese has an oxidation state of 0 because it is an element in its elemental form. In MnS2O12 and MnO2, manganese has oxidation states of +4 and +4 respectively.

In Which Compound Does Manganese Have the Highest Oxidation State