Question
Write electronic configurations of
(i) $Gd$
(ii) $Yb$.
(i) $Gd$
(ii) $Yb$.
✓
Answer
(i) ${ }_{64} Gd [ Xe ] 4 f ^7 5 d ^1 6 s^2$ (Observed)
(ii) $70 Yb [ Xe ] 4 f ^{14} 5 d ^{\circ} 6 s ^2$ (Observed)
(ii) $70 Yb [ Xe ] 4 f ^{14} 5 d ^{\circ} 6 s ^2$ (Observed)
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