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  3. Chemistry
  4. Lanthanides and actinides resemble in:

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Q. Lanthanides and actinides resemble in:

The d-and f-Block Elements

Solution:

Electronic configuration lanthanide $4f^{1-14} 5d^{1}, 6s^{2} $ and electronic configuration of actinoid $5f^{1-14} 6d^{1}, 7s^{2} $