Question:medium
Among the following the isoelectronic species are
I. $Mg^{2+}, Al^{3+}, F^-$
II. $O^{2-}, F^-, N^{3-}$
III. $K^+, Ca^{2+}, Sc^{3+}$
IV. $Mn^{2+}, Fe^{3+}, V^{3+}$
Among the following the isoelectronic species are
I. $Mg^{2+}, Al^{3+}, F^-$
II. $O^{2-}, F^-, N^{3-}$
III. $K^+, Ca^{2+}, Sc^{3+}$
IV. $Mn^{2+}, Fe^{3+}, V^{3+}$
I. $Mg^{2+}, Al^{3+}, F^-$
II. $O^{2-}, F^-, N^{3-}$
III. $K^+, Ca^{2+}, Sc^{3+}$
IV. $Mn^{2+}, Fe^{3+}, V^{3+}$
Show Hint
For isoelectronic ions, the ionic radius decreases as the nuclear charge ($Z$) increases.
Order of size: $N^{3-}>O^{2-}>F^->Na^+>Mg^{2+}>Al^{3+}$.
Updated On: Mar 31, 2026
- II, III only
- I, II, III
- II, III, IV only
- I, III, IV
Show Solution
The Correct Option is B
Solution and Explanation
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