The correct sequence which shows decreasing order of the ion... | CHEMISTRY - PERIODIC TRENDS IN PROPERTIES OF ELEMENTS | SolveeIt | Solveeit

Today, October 3

Question

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

A

Al3+> Mg2+> Na+> F–> O2–

B

Na+> Mg2+> Al3+> O2–> F–

C

Na+> F–> Mg2+> O2–> Al3+

D

O2–> F–> Na+> Mg2+> Al3+

Answer

O2–> F–> Na+> Mg2+> Al3+

Explanation

Solution

For isoelectronic species, ionic radii $\propto$ $\frac{1}{nuclearch\arg e}$ .

So, correct order of ionic radii is 8O2– > 9F– > 11Na+ > 12Mg2+ > 13Al3+.