Q.
Among the ions given below, the total number of diamagnetic species is ____.
$Yb ^{2+}( Z =70), Lu ^{3+}(Z =71), La ^{3+}( Z =57) Ce ^{4+}( Z =58), Nd ^{3+}( Z =60)$
The d-and f-Block Elements
Solution:
Ions
Electronic
configuration
No. of unpaired electrons
$Yb ^{2+}$
$[ Xe ] 4 f ^{14}$
0
$Lu ^{3+}$
$[ Xe ] 4 f ^{14}$
0
$La ^{3+}$
$[ Xe ] 4 f ^{0}$
0
$Ce ^{4+}$
$[ Xe ] 4 f ^{0}$
0
$Nd ^{3+}$
$[ Xe ] 4 f ^{3}$
3
| Ions | Electronic configuration | No. of unpaired electrons |
|---|---|---|
| $Yb ^{2+}$ | $[ Xe ] 4 f ^{14}$ | 0 |
| $Lu ^{3+}$ | $[ Xe ] 4 f ^{14}$ | 0 |
| $La ^{3+}$ | $[ Xe ] 4 f ^{0}$ | 0 |
| $Ce ^{4+}$ | $[ Xe ] 4 f ^{0}$ | 0 |
| $Nd ^{3+}$ | $[ Xe ] 4 f ^{3}$ | 3 |