yes it's -2
There are s8 sulfur molecules. It shows 0 oxidation number.
This is the thiosulfate ion. Sulfur shows +6 oxidation number.
S has an oxidation number of -2. Al is +3.
The oxidation number is + for C and -2 for O.
Atomic sulfur has oxidation number 0. The oxidation number of the sulfide ion is -2. During formation of a wide variety of compounds, the oxidation status of sulfur may differ from -2 to +6.
+6 for sulfur in sulfates
The sulfur in potash alum occurs in sulfate ions, which have the formula SO4-2. Since sulfur is less electronegative than oxygen, the oxygen has an oxidation number of -2; 4 atoms of oxygen give a total negative charge of -8, and the sulfur atom must have an oxidation number of +6 to match the -2 charge of the sulfate ion as a whole.
The oxidation number in atomic sulfur is 0. With other non metals, it produces many ions where its oxidation number varies from -2 to +6. The oxidation number of sulfide ion (which is produced usually with ions from metals) is -2.
-2
+4
+6
-2