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Question

Name these compounds and write down the number of atoms of each kind that combine to form them. One example is done for you.
Example, FeO−Iron oxide−One atom of iron combined with one atom of oxygen.
MgO, CaO, CuS, MgS, PbS, CaS, CuO, ZnO, PbO, FeO, H2O, NaCl, CuCl2

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Solution

MgO–Magnesium oxide–One atom of magnesium combined with one atom of oxygen.
CaO–Calcium oxide–One atom of calcium combined with one atom of oxygen.
CuS–Copper sulphide–One atom of copper combined with one atom of sulphur.
MgS–Magnesium sulphide–One atom of magnesium combined with one atom of sulphur.
PbS–Lead sulphide–One atom of lead combined with one atom of sulphur.
CaS–Calcium sulphide–One atom of calcium combined with one atom of sulphur.
CuO–Copper oxide–One atom of copper combined with one atom of oxygen.
ZnO–Zinc oxide–One atom of zinc combined with one atom of oxygen.
PbO–Lead oxide–One atom of lead combined with one atom of oxygen.
FeO–Iron oxide–One atom of iron combined with one atom of oxygen.
H2O–Water–One atom of oxygen combined with two atoms of hydrogen.
NaCl–Sodium chloride–One atom of sodium combined with one atom of chlorine.
CuCl2–​Copper chloride–One atom of copper combined with two atoms of chlorine.

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