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Which of the following is not a consequence of the Lathanoid contraction ?

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5d series elements have a higher IE₁ than 3d or 4d series

Zr and Hf have a comparable size

Zr and Hf occurs together in the earth crust in their minerals

High density of the period 6 elements

answer is D.

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Detailed Solution

Due to lanthanoid contraction, the atomic radii of the elements which follow lanthanum (Hf, Ta, etc.) are similar to that of the elements of the previous period.

But lanthanoid contraction does not influences density of all the period 6 elements.

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