Consider the isoelectronic species, Na+, Mg2+, F and O2–. The correct order of increasing length of their radii is _________.

(i) F- < O2– < Mg2+ < Na+

(ii) Mg2+ < Na+ < F < O2–

(iii) O2– < F < Na+ < Mg2+

(iv) O2– < F< Mg2+ < Na+

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1 Answers

(ii) Mg2+ < Na+ < F < O2–

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