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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 formula of sulphate is SO4 2- this means the total answer has to add up to minus two. We want S so O stays constant gaining the oxidation number from O from the periodic table. The oxidation number for oxygen is -2, requiring 2 electrons to fill its outer shell. this will determine the oxidation state for Sulfur.eport Abuse. In the sulfate ion, SO42-, the oxidation numbers of the sulfur and the oxygens add up to 2-. The oxygens are 2- each, and the sulfur is 6+. Uzaam (OÑCA) Â· 2 years ago.