`Mn_(2)O_(7)` के लिए स्टॉक निरूपण (Stock notation) है

Write the Stock notation of MnO_2 .

The stock notation for Mn_(2)O_(7) is

Assertion : The highest manganese fluroide is MnF_(4) and the highest oxide is Mn_(2) O_(7) . Reason : In Mn_(2) O_(7) , each Mn is tetrahedrally surrounded by O's including Mn-O-Mn bridge.

Mn_(2)O_(7) is an acidic oxide, why ?