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Atomic and Ionic Sizes of Lanthanides

Give reason:T...

Question

Give reason:
The second and third transition elements have almost similar atomic radii.

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Solution

The second and third transition elements have almost similar atomic radii. It is due to Lanthanoid contradiction. It arises due to poor shielding effect of $d$ and $f$ electron.

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Atomic and Ionic Sizes of Lanthanides

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