The ionic radii of F^(- )and Na^(+) are 133 and 98 pm, respectively.
The ionic radii of F- and Na+ are 133 and 98 pm, respectively.
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- F- and Na+ are isoelectronic ions as they both have 10 electrons.
- However, the nuclear charge on F- is +9 while that of Na+ is +11.
- In isoelectronic species, larger nuclear charge exerts greater attraction on the electrons and thus, the radius of that isoelectronic species becomes smaller.
Thus,
F- has larger ionic radii (133 pm) than Na+ (98 pm).
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