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Stability of Fully Filled and Half Filled Orbitals

Why Cut2 is m...

Question

Why Cu+2 is more stable than Cu+ ?

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Solution

Cu2 + electron configuration:1s2 2s2 2p6 3s2 3p6 3d9
Cu+ electron configuration:1s2 2s2 2p6 3s2 3p6 3d10

From the electronic configuration, it is observed that Cu+ is more stable thanCu2+ due to completely filled d-orbital.

However in aqueous solutions, it is the opposite.

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