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.
Sulfide (systematically named sulfanediide, and sulfide(2â)) (British English sulphide) is an inorganic anion of sulfur with the chemical formula S 2â or a compound containing one or more S 2â ions.