Q1 of 37 Page 1

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

The formula of oxo-anion of Manganese is MnO4-


Manganese belongs to group 7.


Let oxidation state of Mn be x, then calculating oxidation state


X + 4×(oxidation state of oxygen ion) = total charge on ion( -1)


X + 4× (-2) = -1


X = 7 = oxidation state of Mn which is equal to its group number.


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