Copper (Cu, Z=29) is a
Correct answer: D. d10 system with respect to the electronic configuration.
- A. d1 system with respect to the electronic configuration.
- B. d3 system with respect to the electronic configuration.
- C. d7 system with respect to the electronic configuration.
- D. d10 system with respect to the electronic configuration.
Explanation
Copper (Cu) is an exception in electronic configurations due to the stability provided by a fully filled d-orbital and a half-filled s-orbital. The correct configuration is 1s2, 2s2, 2p6, 3s2, 3p6, 4s1, 3d10. The presence of 10 electrons in the 3d orbital places copper in the d10 system. Options A, B, and C are incorrect because they suggest fewer electrons than present in the d-orbital.
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