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JEE Main 2003 Chemistry question

ChemistryThe d and f-Block ElementsJEE Main 2003

The radius of (Atomic number of La = 57 ) is 1.06Å. Which one of the following given values will be closest to the radius of (Atomic number of Lu = 71 )?

Answer: (3)

Solution

Across the lanthanide series the radius decreases steadily (lanthanide contraction) because the poorly shielding 4f electrons cannot offset the increasing nuclear charge.

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Question ID VK-038193