Pair of lanthanide ions which show significant deviation between the experimental and calculated magnetic moments, considering contribution from the ground state only
(a)Gd and Lu
(b)Sm and Th
(c)Eu and Tb
(d)Sm and Eu
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
Sm³⁺ and Eu³⁺ have low-lying excited J states, so their moments deviate from ground-state predictions (d).