" The oxidation state of manganese in "KMnO_(4)" is "

What is the oxidation number of manganese in KMnO_(4) ?

What is the oxidation state of Manganese (Mn) in K_(2)MnO_(4) ?

The highest oxidation state of Manganese is

The O.S. of manganese in KMnO_4 is +7

What is the oxidation state of : Manganese in MnO_2

Higher oxidation state of manganese in fluoride is +4 (MnF_(4)) but highest oxidation state in oxides is +7(Mn_(2)O_(7)) because