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NEETChemistryd and f Block Elements

What is the primary consequence of the lanthanoid contraction on the third transition series?

Options

  1. AIt causes irregularities in atomic radii.
  2. BIt causes irregularities in ionic radii.
  3. CIt makes the elements more reactive.
  4. DIt makes the elements very similar in size to the second series.

Correct answer

D. It makes the elements very similar in size to the second series.

Step-by-step solution

The lanthanoid contraction causes the radii of the third transition series to be "very similar to those of the corresponding members of the second series."

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