NEET UG CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Lanthanide contraction is caused due to

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Correct option: D

The imperfect shielding on outer electrons by

4f

-electrons from the nuclear charge.

Option D (The imperfect shielding on outer electrons by

4f

-electrons from the nuclear charge) is correct because the lanthanide contraction is caused by the imperfect shielding of the nuclear charge by the 4f electrons.

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