Verified Solution • 2025–26 Session
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QJEEM20Ch1db8: JEE Main 2020 Chemistry - Class 11 JEEM20Ch1db8 Solution: The correct order of the ionic radii of O 2– , N 3– , F – , Mg…
The correct order of the ionic radii of
O2–, N3–, F– , Mg2+, Na+ and Al3+ is :
O2–, N3–, F– , Mg2+, Na+ and Al3+ is :
Multiple Choice Options
- A N3– < O2– < F– < Na+ < Mg2+ < Al3+
- B N3– < F– < O2– < Mg2+ < Na+ < Al3+
- C Al3+ < Na+ < Mg2+ < O2– < F– < N3–
- D Al3+ < Mg2+ < Na+ < F– < O2– < N3–
Step-by-Step Verified Solution
For isoelectronic species, as the no. of protons increases, size of ions decreases.
Correct order of size for isoelectronic species
Al3+ < Mg2+ < Na+ < F– < O2– < N3–
Correct order of size for isoelectronic species
Al3+ < Mg2+ < Na+ < F– < O2– < N3–