Using the example of calcium chloride explain how the formulae of compounds are derived (given that the valency of calcium is 2and that of chlorine is1
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The valency of calcium is 2 and chlorine is 1. Therefore, we write the symbols as Ca2 and Cl1. ... * The valencies are exchanged and written as subscripts to the elements. Therefore, the formula of aluminium chloride would be CaCl2.
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