Chlorine, $$\(\mathrm{Cl}_{2}\)$$, reacts with many elements and compounds to form chlorides. Table 2.1 shows information about some chlorides of Period 3 elements. An excess of $$\(\mathrm{Cl}_{2}\)$$ reacts with phosphorus to form $$\(\mathrm{PCl}_{5}\)$$. (i) $$\(\mathrm{PCl}_{5}\)$$ is a simple molecule in the gas phase. It also exists in a solid form as two ions, $$\(\mathrm{PCl}_{4}^{+}\)$$and $$\(\mathrm{PCl}_{6}{ }^{-}\)$$. Complete Table 2.2 to identify the shapes of each of these species.

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