Formula: CaS
Ca is the periodic symbol for Calcium. S is the periodic symbol for Sulfur. As such, CaS2 is a compound of calcium and sulfur.
CaS is the chemical formula for calcium sulphide. NB The elemental letters should NOT be separated by spaces. 'Ca S' is incorrect. I should be written as ' CaS'.
The chemical formula of caesium sulphide is Cs2S.
Calcium sulphide is a compund, it has the formula CaS, and is a white solid.
Calcium sulfide has the chemical formula CaS.
Calcium Sulphide is the name(word) of the substance. It chemical formula is 'CaS'. That is one atom of calcium one atom of sulphur. NB Carefukl with the nameing oif sulphur compounds. 'Sulphate' = -SO4' (Four oxygens). CuSO4 ; Copper SULPHATE) 'Sulphite' = -SO3' (Three oxygen). (CuSO3 ; Copper SULPHITE) 'Sulphide' = -S' (No oxygens). (CuS ' Copper SULPHIDE). Note the subtle change of one letter to indicate a different sulphur type compound.
The chemical formula of silver sulfide is Ag2S.
S-1
NiS
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.