JEE Main201815 Apr 2018Morning ShiftChemistryClassification of Elements and Periodicity in PropertiesActual
For Na ⁺, Mg ²⁺, F ⁻ and O ²⁻ ; the correct order of increasing Ionic radii is :
Options
- AO ²⁻ < F ⁻ < Na ⁺ < Mg ²⁺
- BNa ⁺ < Mg ²⁺ < F ⁻ < O ²⁻
- CMg ²⁺ < Na ⁺ < F ⁻ < O ²⁻
- DMg ²⁺ < O ²⁻ < Na ⁺ < F ⁻
Correct answer
C. Mg ²⁺ < Na ⁺ < F ⁻ < O ²⁻
Step-by-step solution
All species are isoelectronic (10 e ⁻ ) . isoelectronic series, when negative charge increases the radius of ion increases. Mg ²⁺ < Na ⁺ < F ⁻ < O ²⁻