explain the exceptional electronic configuration of chromium and copper
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Explanation:
29 Cu - 1s²2s²2p⁶3s²3p⁶4s¹3d¹⁰
24Cr - 1s²2s²2p⁶3s²3p⁶4s¹3d⁵
According to the rule an orbital can be stable when it is half filed or full filled with hund law in
1) Cu - s is stable by 1 where it is half filled and d is stable by 10 electron and is full filled and stable
2) Cr - s is half filled stable by 1 electron and d is half filled stable by 5 electron and hence Cr is fully stable
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