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Question: Answered & Verified by Expert
Lanthanide contraction is caused due to
Chemistryd and f Block ElementsNEET
Options:
  • A The imperfect shielding on outer electrons by 4 f -electrons from the nuclear charge
  • B The appreciable shielding on outer electrons by 4 f -electrons from the nuclear charge
  • C The appreciable shielding on outer electrons by 5d-electrons from nuclear charge
  • D The same effective nuclear charge from Ce to Lu
Solution:
2346 Upvotes Verified Answer
The correct answer is: The imperfect shielding on outer electrons by 4 f -electrons from the nuclear charge
Lanthanide contraction is caused due to poor screening effect of 4f orbitals

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