Q15 / 180 · KCET 2015 · Chemistry

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
\( [X e] 4 f^{7} 5 d^{1} 6 s^{2} \)
Correct answer
D
\( [X e] 4 f^{7} 5 d^{1} \)

Solution

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 \( 7^{7} 5 d^{1} \)

Hence, the correct answer is option: 'D'.

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