Which of the following trivalent ions has the | vedclass

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Question

(A) In the lanthanide series,as the atomic number increases from $La$ $(Z=57)$ to $Lu$ $(Z=71)$,the ionic radii of the trivalent ions $(Ln^{3+})$ decr

Vedclass · Accepted Answer

$La^{3+}$

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(A) In the lanthanide series,as the atomic number increases from $La$ $(Z=57)$ to $Lu$ $(Z=71)$,the ionic radii of the trivalent ions $(Ln^{3+})$ decrease steadily due to lanthanoid contraction.Since $La^{3+}$ is the first ion in the series,it possesses the largest ionic radius among the given options.Therefore,the correct option is $A$.

Which of the following trivalent ions has the largest atomic radius in the lanthanide series?

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