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The d & f Block Elements — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements1 Mark
MCQ
The property seen in f-block elements is:
  • A
    Lanthanoid contraction.
  • B
    Actinide contraction.
  • C
    Both (A) and (B).
  • D
    Lanthanoid expansion.
✓

Answer

  1. Both (A) and (B).

Explanation:

The property seen in f-block elements are Lanthanoid contraction and Actinide contraction. Lanthanide contraction is a term used in chemistry to describe the greater than expected decrease in ionic radii of the elements in the lanthanide series.

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