Medium MCQ +4 / -1

The phenomenon of "lanthanide contraction" refers to:

  1. A Decrease in atomic size from La to Lu
  2. B Increase in atomic size from La to Lu
  3. C Decrease in ionic size of Ln³⁺ ions
  4. D Both a and c Correct answer

Solution

Lanthanide contraction: gradual decrease in atomic and ionic radii (Ln³⁺) across the series due to poor shielding by 4f electrons.

About this question

Subject: Chemistry · Chapter: d and f Block Elements · Topic: Lanthanides and Actinides

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