NiS
NiS .simple just take H2S so s has valency 2.we know nickel has valency 2(i hope you did) so formula is NiS
The chemical formula of caesium sulphide is Cs2S.
Formula: CaS
The chemical formula of silver sulfide is Ag2S.
S-1
S2-
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.
The Chemical Formula for Nickel Sulphate is NiSO4.
The chemical formula for copper(I) sulfide is Cu2S.
The chemical formula for lead (IV) sulfide is written as PbS2.
The chemical formula for copper(I) sulfide is Cu2S.