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Zinc sulphid ---Zns and calcium sulphide ---Cas 
1 5 1

zinc sulphide

zn + s = zns

zinc + sulphur = zinc sulphide

calcium sulphide

ca + s = cas

calcium + sulphur = calcium sulphide

hope I helped u

pl mark as the best!!!!!!

3 4 3
Nice answer.
make the First letter of an element capital. That would be better :)
thanku dear..i will try to improve
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