S2-
The chemical formula of caesium sulphide is Cs2S.
The chemical formula for tin sulphide is SnS
Formula: CaS
it is S2- ,while sulphite ion is SO32-
The chemical formula of silver sulfide is Ag2S.
A sulphide is a simple chemical combination of an element and the Sulphur atom e.g. Hydrogen Sulphide, H2S. A sulphite is a chemical combination of an element and a compound of Sulphur and Oxygen, namely 3 Oxygen atoms to every Sulphur atom. E.g. Calcium Sulphite CaSO3.
Ca is the periodic symbol for Calcium. S is the periodic symbol for Sulfur. As such, CaS2 is a compound of calcium and sulfur.
The sulphide (or sulfide) ion is similar to a sulfur atom except for 2 additional electrons, so its formula is S2-. In older references you might find this formula written S-2 or S--.
S-1
NiS
The formula is: Li2S the "2" is a subscript
The chemical formula for sulphide is S^2-. It is composed of one sulfur atom bonded to two electrons, giving it a -2 charge.