MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryPeriodic PropertiesAtomic radius

Identify the correct order in which the ionic radius of the following ions increases (I) F– (II) Na+ (III) N3–

A.III, I, II

B.I, II, III

C.II, III, I

D.II, I, III✓ Correct

Explanation

Isoelectronic species are the species that have the same number of electrons. In isoelectronic species, the greater the nuclear charge or atomic number the smaller will be the ionic radius. Hence, the correct order of the ionic radius is 3 Na F N . Therefore, the correct option is d.

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