The oxidation number of manganese depends on the particular compound in which manganese is present. The most common oxidation states are +2 as in MnCl2, + 4 as in MnO2, and + 7 as in potassium permanganate, KMnO4.
-2 for each O
+2 for Mn
+1 for each H, -2 for each O, +6 for Mn
I assume you mean the oxidation number of Mn in the permanganate ion , MnO4- The sum of the oxidation numbers is the charge on a polyatomic ion so Mn has an oxidation number of +7 as each O is assigned -2.
O2 is -2 so Mn is +4
MnO2 manganese(IV) oxide. Oxygen has a -2 oxidation state (oxidation state is a better term here as oxidation number is better used for complexes- they give the same answer for this compound)
The change is from 4 to 3.
Carbon, Sulfur, CO, FeCl2, MnO2..
MnO2: oxidation number +4KMnO4: oxidation number +7
I assume you mean the oxidation number of Mn in the permanganate ion , MnO4- The sum of the oxidation numbers is the charge on a polyatomic ion so Mn has an oxidation number of +7 as each O is assigned -2.
-2 for each O, +4 for Mn
O2 is -2 so Mn is +4
MnO2 manganese(IV) oxide. Oxygen has a -2 oxidation state (oxidation state is a better term here as oxidation number is better used for complexes- they give the same answer for this compound)
The change is from 4 to 3.
MnCl2: oxidation number +2MnO2: oxidation number +4KMnO4: oxidation number +7
Carbon, Sulfur, CO, FeCl2, MnO2..
The chemical formula of this is MnO2.It is brown in colour. The oxidation number of Mn is 4 in this compound.
The oxidation numbers in PO43- , phosphorus oxidation number=+5; oxygen = -2
There are two oxidation numbers. P shows +5 oxidation number.
The oxidation numbers of the elements in a chemical formula, some of which will be positive and others of which will be negative, when multiplied by the numbers of atoms with each oxidation number, must produce products that add to a net result of zero.