Difficult
Which of the following is the incorrect order of ionic radius?
- A$Na^{+} > Mg^{+2} > Al^{+3}$
- B$V^{+2} > V^{+3} > V^{+4} > V^{+5}$
- C$K^{+} > Sc^{+3} > V^{+5} > Mn^{+7}$
- D$O^{-2} > Rb^{+} > Sr^{+2} > Cs^{+}$
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View SolutionAssertion $(A)$: $Mg^{2+}$ and $Al^{3+}$ are isoelectronic but the magnitude of the ionic radius of $Al^{3+}$ is less than that of $Mg^{2+}$.
Reason $(R)$: The effective nuclear charge on the outermost electrons in $Al^{3+}$ is greater than that in $Mg^{2+}$.
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Reason $(R)$: The effective nuclear charge on the outermost electrons in $Al^{3+}$ is greater than that in $Mg^{2+}$.
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