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The d & f Block Elements — Chemistry STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements1 Mark
Question
Which of the following has smallest ionic radius ?
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Answer

As we move from left to right in a raw, radii decreases.
So radii of $Lu^{+3}$ is smallest among all.

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