STANDARDChemistry-Electronic Configuration
STANDARD Chemistry Transition Elements MCQ Question
Type: MCQ-conceptual-Medium
The electronic configuration of copper (₂₉Cu) is
A
1s², 2s²2p⁶, 3s²3p⁶3d⁹, 4s²
B
1s², 2s²2p⁶, 3s²3p⁶3d¹⁰, 4s¹
C
1s², 2s²2p⁶, 3s²3p⁶, 4s²4p⁶
D
1s², 2s²2p⁶, 3s²3p⁶3d¹⁰
Correct Answer
Option B
Detailed Explanation
3d subshell filled with 10 electrons is more stable than that filled with 9 electrons. 1, 4s electrons jumps into 3d subshell for more stability.
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