The correct order of the ionic radii of O2–, N3–, F–, Mg2+, Na+

1.	The correct order of the ionic radii of O2–, N3–, F–, Mg2+, Na+ and Al3+ is : (1) Al3+ < Na+ < Mg2+ < O2– < F– < N3– (2) N3– < O2– < F– < Na+ < Mg2+ < Al3+ (3) Al3+ < Mg2+ < Na+ < F– < O2– < N3– (4) N3– < F– < O2– < Mg2+ < Na+ < Al3+
Answer» (3) Al³⁺ < Mg²⁺ < Na⁺ < F^– < O^2– < N^3– Correct order of size for isoelectronic species. Al³⁺ < Mg²⁺ < Na⁺ < F^– < O^2– < N^3–

The correct order of the ionic radii of O2–, N3–, F–, Mg2+, Na+ and Al3+ is : (1) Al3+ < Na+ < Mg2+ < O2– < F– < N3– (2) N3– < O2– < F– < Na+ < Mg2+ < Al3+ (3) Al3+ < Mg2+ < Na+ < F– < O2– < N3– (4) N3– < F– < O2– < Mg2+ < Na+ < Al3+

Answer»

(3) Al³⁺ < Mg²⁺ < Na⁺ < F^– < O^2– < N^3–

Correct order of size for isoelectronic species.

Al³⁺ < Mg²⁺ < Na⁺ < F^– < O^2– < N^3–

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