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Question 860010
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d- and f-Block Elements: Mixed MCQ

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MixedEasyQuestion 860010

Question

The f-block elements (lanthanides and actinides) are so called because:
  1. A
    Their differentiating electrons fill f-orbitals
    Correct
  2. B
    They have f in their name
  3. C
    They all have f-shaped nuclei
  4. D
    They are in the last f group

Correct answer

Their differentiating electrons fill f-orbitals

Explanation

In lanthanides (Ce to Lu), the 4f orbitals are being filled. In actinides (Th to Lr), the 5f orbitals are filled. The 'differentiating' (last added) electron enters the f subshell.

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