Which of the following is the largest contributor to the salt ions in the ocean?

sodium

chloride

sulfates

calcium

The largest contributor to the salt ions in the ocean is chloride, which is part sodium and calcium salts.

I think the correct answer from the choices listed above is the second option. Chloride is the largest contributor to the salt ions in the ocean. This is because it is part of both calcium and sodium salts which is very rich in oceans. Hope this answers the question. Have a nice day.