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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.

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lenpollock

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3w ago

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