Identify the element having the smallest ioni | vedclass

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(D) The phenomenon of lanthanide contraction is observed in $4f$ elements due to the increase in effective nuclear charge as we move across the series

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Lu

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(D) The phenomenon of lanthanide contraction is observed in $4f$ elements due to the increase in effective nuclear charge as we move across the series. As a result,the atomic and ionic radii decrease continuously from lanthanum $(Z=57)$ to lutetium $(Z=71)$. Since lutetium $(Lu)$ is the last element in the lanthanide series,it has the highest effective nuclear charge and therefore the smallest ionic radius in the $+3$ state.

Identify the element having the smallest ionic size in the $+3$ state from the following.

Similar Questions

Identify the formula of compound $(B)$ formed in the following reaction:
$(i)$ Lanthanoids $(Ln)$ are burnt in oxygen to form compound $(A)$.
$(ii)$ Compound $(A)$ reacts with $CO_2$ in excess to form compound $(B)$.

Which of the following elements are included in the actinoid series?

How and in what quantities are actinoid elements obtained?

Europium is

Consider the following statements:
$I$. $La(OH)_3$ is the least basic among hydroxides of lanthanides.
$II$. $Zr^{4+}$ and $Hf^{4+}$ possess almost the same ionic radii.
$III$. $Ce^{4+}$ can act as an oxidizing agent.
Which of the above is/are true?

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