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Write the chemical formulae of the following.
(a) Magnesium chloride
(b) Calcium oxide
(c) Copper nitrate
(d) Aluminum chloride
(e) Calcium carbonate

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Detailed Solution

Chemical formulae:

(a) Magnesium chloride = MgCl₂

For magnesium(Mg), the valency = 2

For chlorine (Cl), the valency = 1

Now criss-cross the symbol with the valency of another element. Thus, the chemical formula will be MgCl₂.

(b) Calcium oxide = CaO

(d) Aluminum chloride = AlCl₃

(e) Calcium carbonate = CaCO₃

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