MCQ
Diamagnetic Lanthanoid ions are:
- A$Nd ^{3+}$ and $Eu ^{3+}$
- ✓$La ^{3+}$ and $Ce ^{4+}$
- C$Nd ^{3+}$ ad $Ce ^{4+}$
- D$Lu ^{3+}$ and $Eu ^{3+}$
✓
Answer
Correct option: B.
$La ^{3+}$ and $Ce ^{4+}$
(B)
$Ce :[ Xe ] 4 f ^1 5 d^1 6 s^2 ; Ce ^{4+}$ diamagnetic
$La :[ Xe ] 4 f ^0 5 d^1 6 s^2 ; La ^{3+}$ diamagnetic
$Ce :[ Xe ] 4 f ^1 5 d^1 6 s^2 ; Ce ^{4+}$ diamagnetic
$La :[ Xe ] 4 f ^0 5 d^1 6 s^2 ; La ^{3+}$ diamagnetic
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