How do we represent the #"sulfate ion"#?

1 Answer
Mar 5, 2016



The elements composing the #SO_4^(2-)# are located in Group 16 which have 6 valence electrons each and both are nonmetallic. This means that these elements have the tendency of sharing their electrons to achieve stability.

Sulfur shares its 6e- to 3 Oxygen atoms to complete the octet leaving 1 Oxygen with only 6. The oxidation number of #-2# for this covalently bonded ion signifies that it has gained 2e- to complete the octet of the other Oxygen atom.