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NEETChemistryd and f Block Elements

When does behavior similar to that of the lanthanoids become evident in the actinoid series?

Options

  1. AIn the first half of the actinoid series
  2. BIn the second half of the actinoid series
  3. CIn the middle of the actinoid series
  4. DIn the last quarter of the actinoid series

Correct answer

B. In the second half of the actinoid series

Step-by-step solution

A comparison of the actinoids with the lanthanoids, with respect to different characteristics reveals that behaviour similar to that of the lanthanoids is not evident until the second half of the actinoid series.

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