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Oxidation number of Mn in MnO4

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In the compound MnO4-, the oxidation number of manganese (Mn) can be determined by considering the known oxidation states of the other elements in the formula.

Oxygen (O) typically has an oxidation number of -2 in most compounds. Since there are four oxygen atoms in MnO4-, the total oxidation number contribution from oxygen is -2 * 4 = -8.

The overall charge of the compound is -1, as indicated by the minus sign in MnO4-. This means the sum of the oxidation numbers of all elements must add up to -1.

Let the oxidation number of manganese be x.

Now, we can set up the equation:

x + (-8) = -1

Solving for x:

x = -1 + 8

x = +7

So, in MnO4-, the oxidation number of manganese (Mn) is +7.

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