Which actinoid from the following has the sma | vedclass

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(D) $1$. In the actinoid series, as the atomic number increases, the ionic radius decreases due to actinoid contraction.$2$. Actinoid contraction is s

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$Lr$

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(D) $1$. In the actinoid series, as the atomic number increases, the ionic radius decreases due to actinoid contraction.$2$. Actinoid contraction is similar to lanthanoid contraction, caused by the poor shielding effect of $5f$ electrons.$3$. Among the given options, $Lr$ (Lawrencium, $Z=103$) has the highest atomic number.$4$. Therefore, $Lr^{3+}$ has the smallest ionic size.

Which actinoid from the following has the smallest ionic size in the $+3$ oxidation state?

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