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Chemistry · 2025 · 1 mark
CBSE 2025 · Region 2 · Set 1 · Q4
The element having [ Ar ] 3 d^10 4 s^1 electronic configuration is
The element having $\displaystyle [\mathrm{Ar}] 3 \mathrm{~d}^{10} 4 \mathrm{~s}^{1}$ electronic configuration is
Official answer
(A)
Cu
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CBSE Class 12 Chemistry past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.