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In the isoelectronic species the ionic radii (A^o) of N^3–, O^2–, F^– are respectively given by

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1.71, 1.36, 1.40

1.71, 1.40, 1.36

1.36, 1.71, 1.40

1.36, 1.40, 1.71

answer is D.

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Detailed Solution

In case of isoelectronic species, Ionic radius increases as -ve charge(no. of electrons) increases and +ve charge(nuclear charge) decreases.

Hence Ionoic radii of N^3–, O^2–, F^– are 1.71, 1.40, 1.36 respectively.

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