Verified Solution • 2025–26 Session
moderate
QJEEM20Ch61b5: JEE Main 2020 Chemistry - Class 11 JEEM20Ch61b5 Solution: The ionic radii of O 2– , F – , Na + and Mg 2+ are in the order :
The ionic radii of O2–, F–, Na+ and Mg2+ are in the order :
Multiple Choice Options
- A F– > O2– > Na+ > Mg2+
- B Mg2+ > Na+ > F– > O2–
- C O2– > F– > Mg2+ > Na+
- D O2– > F– > Na+ > Mg2+
Step-by-Step Verified Solution
Among isoelectronic species, greater the Zeff smaller will be the radius.
Order of Zeff : Mg2+ > Na+ > F– > O2–
Order of Ionic Radii : O2– > F– > Na+ > Mg2+
Order of Zeff : Mg2+ > Na+ > F– > O2–
Order of Ionic Radii : O2– > F– > Na+ > Mg2+