The correct order of the ionic radii of O2–, N3–, F–, Mg2+, Na+ and al3+ is : (A) N3–

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Question

The correct order of the ionic radii of O2–, N3–, F–, Mg2+, Na+ and al3+ is :

(A) N3– < F– < O2– < Mg2+ < Na+ < Al3+
(B) Al3+ <Mg2+ < Na+ < F– < O2– < N3–
(C) Al3+ <Na+ < Mg2+ < O2– < F– < N3–
(D) N3– < O2– < F– < Na+ < Mg2+ < Al3+

Prashant Kotian · Accepted Answer

Correct answer: B. Al3+ < Mg2+ < Na+ < F–< O2– < N3– All are isoelectronic species so more is the zeff less will be the ionic size.

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