Smallest ionic radius is:

{L a}^{3 +}

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U^{3 +}

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{Y b}^{3 +}

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{C f}^{3 +}

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Solution

The correct option is B ${Y b}^{3 +}$
Atomic and ionic radius of lanthanides decreases from La to Lu.
Due to the contraction of lanthanide the decrease in ionic radius of the element in the lanthanide series from lanthanum to lutetium occurs.

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Similar questions

C e^{3 +}

L a^{3 +}

P m^{3 +}

Y b^{3 +}

C e^{3 +}, L a^{3 +}, P m^{3 +}

Y b^{3 +}

Y b^{3 +}, L a^{3 +}, E u^{3 +}

L u^{3 +}

C e, L a, P m

Y b

+ 3

Arrange $C e^{3 +}, L a^{3 +}, P m^{3 +}$ and $Y b^{3 +}$ in increasing order of their ionic radii.

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