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

Explanation

In Copper (I) ion, all orbitals are completely filled `(1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3s^(10))` and, therefore, it is diamagnetic and forms white compounds. Copper (II) ion has electronic configuration. `(1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3s^(9))` ( has one unpaired electron) and , therefore,it is paramagnetic and forms coloured compounds.