Q. The radius of ${La}^{3 +}$ (Atomic number of La = 57) is 1.06 Å. Which one of the following given values will be closest to the radius of ${Lu}^{3 +}$? (Atomic number of Lu=71)
A) 1.60 Å
B) 1.40 Å
C) 1.06 Å
D) 0.85 Å
Explanation
(d)
Due to lanthanide contraction there occurs net decrease in size. Only one 0.85 Å is smaller one.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.