Question

Highest stable mn fluoride is mnf4 where as highest mn oxide is mn2o7 due to

Answer 1

The most stable oxidation state of mn is +4 or +7 and in mnf4 mn have +4 oxidation state and in mn2o7 mn have + 7 oxidation state
So the highest stable mn fluoride is mno4 and oxide is mn2o7 ..