Q. Which of the following ion is diamagnetic?
A) $Nd^{3 +}$
B) $La^{3 +}$
C) $Tb^{3 +}$
D) $Er^{3 +}$
Explanation
(b)
Paramagnetism is shown by the positive ions of lanthanides except $La^{3 +}(4f^{0})$ and $Lu^{3 +}(4f^{14})$. These ions are diamagnetic
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.