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The group number for sulfur is group #16 on the element table. It is pale yellow, and the number of Neutrons is 19. 1 person found this useful.
The sum of the oxidation numbers in a polyatomic ion is equal to the charge on the ion. The oxidation number of the sulfur atom in the SO42- ion must be +6, for example, because the sum of the oxidation numbers of the atoms in this ion must equal -2. SO42-: (+6) + 4(-2) = -2. 11.