Which atom among the following has an ionic radius that is larger than its atomic radius?

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Solution

The correct option is D Cl
Cationic radius is smaller than atomic radius while anionic radius is larger than atomic radius.
Chlorine gains one electron to form chloride anion which is larger in size than atomic radius of Cl.
While all other atoms form cationic species which have smaller ionic radii than corresponding atomic radii.

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