Chemistry-Transition Elements
NEET Chemistry Transition Elements MCQ Question
Type: MCQ-diagram based-Easy-Class 12
Imagine a diagram showing the atomic radii of elements in the second and third d series of the periodic table. Which factor primarily contributes to the similar radii observed between Zr and Hf despite their increasing atomic numbers?
A
Lanthanoid contraction
B
Effective nuclear charge
C
Increased electron shielding
D
Higher oxidation states
Correct Answer
Option A
Detailed Explanation
The similar radii of Zr and Hf are due to the lanthanoid contraction, which results from imperfect shielding of electrons, particularly in the 4f orbitals.
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