NEET2014Chemistry-Periodic Table
NEET 2014 Chemistry Lanthanoids MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Reason of lanthanoid contraction is ________.
A
negligible screening effect of 'f' orbitals
B
increasing nuclear charge
C
decreasing nuclear charge
D
decreasing screening effect
Correct Answer
Option A
Detailed Explanation
The poor shielding effect of f-electrons leads to a greater effective nuclear charge, causing lanthanoid contraction.
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