Mn2O7+Al=
The oxidation number of Mn in Mn2O7 is +7. This is because oxygen normally has an oxidation number of -2, and since the molecule is neutral, the sum of the oxidation numbers must equal zero.
In H2C2O4, oxidations states are +3 for Mn in Mn2O7, +2 for Hg in Hg2Cl2, and +5 for I in IF5.
The formula for manganese(VII) nitrate is Mn(NO3)7.
MN m and 5 are the terms. 5 is the costant
In this case the roman numerals indicate the oxidation state of the cation portion of the polyatomic ion: [Fe(II)O2]2- as opposed to [Fe(III)O2]1- Mn(II)=Mn2+ Mn(VII)=Mn7+
4
m(n + 1)
Manganese (Mn)
Mn: 1s22s22p63s23p63d54s2 Mn2+: 1s22s22p63s23p63d5
Mn has 25 protons.
5mn + 6n - 14
(m - 5)(n - 4)