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The atomic radill of alkali meals (M) li...

The atomic radill of alkali meals (M) lie in the order `Li lt Na lt K lt Rb,` but the radii of `M^(+)` ions in aqueous solution lie in the reverse order `Li^(+) gt Na^(+) gt Rb^(+).` What is the reason for this reverse order (on going from Li to Rb)

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