1.

Copper (I) compounds are white and diamagnetic while copper(II) compounds are coloured and paramagnetic. Explain.

Answer» In copper(I) ion, all orbitals are completely filled `(3d^(10)4s^(0))` and, therefore, it is diamagnetic and forms white compounds. Copper (II) ion has electronic configuration `3d^(9)` (has one unpaired electrons) and, therefore, it is paramagnetic and forms coloured compounds.


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