MHT CET Chemistry question
Because of lanthanoid contraction, which of the following pairs of elements have nearly same atomic radii? (Numbers in the parenthesis are atomic numbers) [AIPMT 2015]
Answer: (C)
Solution
Lanthanoid contraction makes the 5d element Hf almost the same size as the 4d element Zr of the same group; Ti-Zr
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