Duration: 3:39

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Which of the following electron configurations is
P correct for copper, (atomic number 29)?

W
(A) \( [\mathrm{Ar}] 3 \mathrm{~d}^{10} 4 \mathrm{~s}^{1} \)
(B) \( [\mathrm{Kr}] 3 \mathrm{~d}^{9} 4 \mathrm{~s}^{1} \)
(C) \( [\mathrm{Ar}] 3 \mathrm{~d}^{9} 4 \mathrm{~s}^{2} \)
(D) \( [\mathrm{Kr}] 3 \mathrm{~d}^{10} 4 \mathrm{~s}^{1} \)
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