MCQ
The expected electronic configuration of lanthanum (La) (Z = 57) is …………..
- ✓$[X e] 4 f^{\prime} 5 d^{\circ} 6 s^2$
- B$[X e] 4 f^0 5 d^1 6 s^2$
- C$[ Xe ] 4 f ^3$
- D$[X e] 4 f^0 5 d^3$
✓
Answer
Correct option: A.
$[X e] 4 f^{\prime} 5 d^{\circ} 6 s^2$
$[ Xe ] 4 f^1 5 d^{\circ} 6 s^2$
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