Write the formula of an oxo-anion of Manganese (Mn) in which it shows the oxidation state equal to its group number

Explanation

To find the formula of an oxo-anion of manganese (Mn) where the oxidation state equals its group number, we can follow these steps:

### Step 1: Identify the Group Number of Manganese
Manganese (Mn) is located in Group 7 of the periodic table. Therefore, its group number is 7.

### Step 2: Determine the Oxidation State
We need to find an oxo-anion of manganese where the oxidation state of manganese is +7, which corresponds to its group number.

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