It is As2S3
2As3+ + 3S2- ---------> As2S3
An arsenopyrite is a silvery-grey ore of arsenic - a mixed arsenide and sulphide of iron, chemical formula FeAsS.
The formula for cesium sulphide is Cs2S.
The formula for lithium sulphide is Li2S.
The formula for Lead Sulfide (or Lead Sulphide) is either: PbS for Lead(II) Sulphide, or PbS2 for Lead(IV) Sulphide.
The chemical formula of caesium sulphide is Cs2S.
The formula is: Li2S the "2" is a subscript
Formula: CaS
The chemical formula for francium is Fr and the chemical formula for arsenic is As.
AlS
It is Na2S
It is SrS