What is the sum of the oxidation numbers of all the atoms in ?
0
2
-2
1
Rules for Oxidation Number -
The algebraic sum of the oxidation number of all the atoms in a compound must be zero. In a polyatomic ion, the sum is equal to the charge on the ion.
O.N.(Sn) = +2
O.N.(Cl) = +7
O.N.(O) = -2