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  4. Ionic radii are

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Q. Ionic radii are

Classification of Elements and Periodicity in Properties

Solution:

Ionic radii are inversely proportional to effective nuclear charge. Ionic radii in the nth orbit is given as $r_n = \frac{n^2 a_0}{Z} $ or $r_n \propto \frac{1}{Z}$ when n = principal quantum number Z-effective nuclear change.