A) both have half-filled p-and d-orbitals.
B) cuprous ion has incomplete d-orbital and cupric ion has a complete d-orbital.
C) both have unpaired electrons in the d-orbitals.
D) cuprous ion has complete d-orbital and cupric ion has an incomplete d-orbital.
Correct Answer: D
Solution :
[d] In \[C{{u}^{+}}\left[ Ar \right]3{{d}^{10}}\] there is no unpaired electron, \[C{{u}^{2+}}\left[ Ar \right]3{{d}^{9}}\] contains one unpaired electron hence coloured.
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