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Write electron configuration of chromi...

Write electron configuration of chromium and copper give reason of are `(z= 24)` Cu (z=10 and Cr =`4s^(1)`

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Electron configuration of `Cr : [Ar]^(18) 3d 4s^(1)`
Orbital diagram of Cr :
Electron configuration of `Cu : (Ar) ^(18) 3d^(10) 4s^(1) `
Orbital diagram of Cu :
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