Question

electronic configuration of copper

Answer 1

copper is the element of exceptional electronic configuration .

it electronic configuration is  

1s²2s²2p⁶3s²3p⁶3d¹⁰4s¹

generally it require to become stable by half filling or full filled shells of outermosts

so the valance electronic configuration is changes to 3d⁹4s² to 3d¹⁰4s¹

Answer 2

hey mate here your answer.
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copper (cu)
atomic no= 29
electronic configuration

1s2 2s2 2p6 3s2 3p6 4s2 3d9

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