Question:medium

Given below are two statements Statement-I: Due to lanthanoid contraction 4d- and 5d-series of elements have more or less same atomic and ionic radii Statement-II: Lanthanoids exhibit more number of oxidation states than actinoids

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Lanthanoids: Mostly +3 oxidation state. Actinoids: Show many oxidation states (+3 to +7 commonly). Hence actinoids have greater oxidation-state variability.
Updated On: Jun 22, 2026
  • Both statements I and II are correct
  • Statement I is correct but statement II is not correct
  • Statement I is not correct but statement II is correct
  • Both statements I and II are not correct \bigskip
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The Correct Option is B

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