Which element from the following has the larg | vedclass

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(C) In the lanthanoid series,the ionic radii of $Ln^{3+}$ ions decrease regularly with an increase in atomic number due to lanthanoid contraction. Sin

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$La^{3+}$

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(C) In the lanthanoid series,the ionic radii of $Ln^{3+}$ ions decrease regularly with an increase in atomic number due to lanthanoid contraction. Since $La$ $(Z=57)$ has the lowest atomic number among the given elements $(La, Pr, Sm, Yb)$,its $La^{3+}$ ion will have the largest ionic size. The order of ionic size is: $La^{3+} > Pr^{3+} > Sm^{3+} > Yb^{3+}$.

Which element from the following has the largest ionic size in the $+3$ state?

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