JEE · NEET Previous Year Question

The radius of La3+ (Atomic number of La = 57) is 1.06Å. Which one of the following given values will be closest to the radius of Lu3+ (Atomic number of Lu = 71) ?

Topic: JEE PYQ

Answer: D. Full step-by-step solution below.

  1. A1.60Å
  2. B1.40Å
  3. C1.06Å
  4. D0.85Å

Correct answer: D

Solution

(d) Due to lanthanide contraction there occurs net decrease in size. Only one 0.85Å is smaller one. So radius of will be closest to 0.85Å

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