Question:

Assertion (A): Actinoid contraction is greater from element to element than lanthanoid contraction. Reason (R): Actinoids show wide range of oxidation states.

Updated On: Jun 25, 2025
  • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
  • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
  • Assertion (A) is true, but Reason (R) is false.
  • Assertion (A) is false, but Reason (R) is true.
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The Correct Option is A

Solution and Explanation

The actinoid contraction is greater than the lanthanoid contraction because of the greater ef- fective nuclear charge in actinoids. This increased nuclear attraction leads to a smaller size and greater variation in oxidation states, making their chemistry more complex.
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