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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
5f series elements are known as_______?
  • A
    Lanthanides.
  • B
    Representative elements.
  • C
    Transition elements.
  • D
    Actinides.
✓

Answer

  1. Actinides.

Explanation:

Actinides are also called the 5f series.

Filling up of the 5f orbitals after actinium (Z = 89) gives the 5f-inner transition series known as the actinoid series.

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