The correct sequence which shows decreasing order of the ionic radii of the elements is:

Chemistry · JEE Main · NTA Exams — Classification of Elements and Periodicity in Properties

1. Al³⁺ > Mg²⁺ > Na⁺ > F^- > O^2-
2. Na⁺ > Mg²⁺ > Al³⁺ > O^2- > F^-
3. Na⁺ > F^- > Mg²⁺ > O^2- > Al³⁺
4. O^2- > F^- > Na⁺ > Mg²⁺ > Al³⁺

Answer

(D) O 2- > F - > Na + > Mg 2 + > Al 3 +

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