KCET · Chemistry · d and f Block Elements
The electronic configuration of \( G d^{2+} \) is (at. no. of \( G d \) is 64)
- A \( [X e] 4 f^{8} \)
- B \( [X e] 4 \mathrm{f}^{7} \)
- C \( [X e] 4 f^{7} 5 d^{1} 6 s^{2} \)
- D \( [X e] 4 f^{7} 5 d^{1} \)
Answer & Solution
Correct Answer
(D) \( [X e] 4 f^{7} 5 d^{1} \)
Step-by-step Solution
Detailed explanation
The electronic configuration for Gd is [X e ]4 \( f^{7} 5 d^{1} 6 s^{2} \) and for \( G d^{2+} \) is [X e ] 4f \( 7^{7} 5 d^{1} \)
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