Dictionary entry overview: What does isle mean? â¢ ISLE (noun) The noun ISLE has 1 sense: 1. a small island Familiarity information: ISLE used as a noun is very rare.
The sulfate ion is SO42- The sulfite ion is SO32- and is more basic that sulfate.
A sulfide ion is an ion of just the sulfur atom on its own, whereas a sulfate ion is an ion that is composed of sulfur and oxygen, typically SO42-. 2 people found this useful.