Assign an appropriate reason for each of the following statements:
SiF₆^2– is known but SiCl₆^2– is not known.

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SiF₆^2– is known but SiCl₆^2– is not known. This is because of the size of atom.
The size of fluorine is small as compare to chlorine.
(a)    The steric repulsions are less in SiF₆^2– due to the smaller size of the F atom
(b)    The interaction of the lone pairs of electrons on the F atom with Si are stronger than that of chlorine lone pairs.