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CGP EDU Academic Team
Published on: August 13, 2026
What is the effect of lanthanoid contraction in lanthanoid series of elements with increasing atomic number?
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Verified by ExpertsThe correct answer is:
A
Lanthanide contraction is the steady decrease in size of atoms and ions of rare earth elements with increasing atomic number from lanthanum. Lanthanide contraction is caused by poor shielding effect of 
-electrons.
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