HARDMCQ SINGLEIChO (Chemistry Olympiad)Inorganic ChemistryPeriodic PropertiesAchiever Section
Consider the isoelectronic species, Na+, Mg2+,F –and O2–. The correct order of increasing length of their radii is ...........
A.F–< O2– < Mg2+< Na+
B.Mg2+< Na+ < F– < O2–✓ Correct
C.O2–<F–< Na+< Mg2+
D.O2–< F– < Mg2+< Na+
Explanation
1 Isoelectronic species; Ionic Radii eff Z 2 2 order of Zeff value is O F Na Mg Thus, Ionic Radii follows the order 2 2 Mg Na F O
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