Copper's Valence Electrons: How Can It Lose More Than One?

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SUMMARY

Copper (Cu) has one valence electron but can lose more than one when forming cupric compounds (Cu²⁺). This occurs due to the stability of filled orbitals, where an electron from the 4s orbital can transition to the 3d orbital, resulting in the electronic configuration of 3d¹⁰4s¹. The ability of copper to lose multiple electrons is attributed to the stability gained from having a fully filled 3d subshell, which allows for the loss of additional electrons beyond the single valence electron.

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Johnleprekan
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Copper has one valence electron, but it can lose more than one when forming cupric compounds. I had thought it could only lose the valence electron. How can this happen?

If this is true, how does an electron from the d orbital jump to a higher orbital if only valence electrons can make the jump?
 
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The general electronic configuration of 3d elements is 3d1-104s1-2. As one moves gradually along the group the electrons get filled to the 3d orbitals. So by that condition copper should have the electronic configuration as 3d94s2. But since completely filled orbitals are more stable an electron jumps back to 3d, giving the configuration as 3d104s1. So one of the electrons in 3d orbital is the valence electron itself. Thats the reason why all those happen...
Regards
 

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