The electronic configuration of Cu(II)is `3d^9` whereas that of Cu(I) is `3d^10`". Which of the following is correct?

Options

A. Cu(II) is more stable
B. Cu(I) and Cu(II) are equally stable
C. Cu(II) is less stable
D. Stability of Cu(I) and Cu(II) depends on nature of copper salts

Answer

A

Explanation

Though Cu (1) has `3d^(10)` stable configuration while Cu (II) has `3d^9`configuration, yet Cu(II) is more stable due to greater effective nuclear charge of Cu (II) (i.e., to hold 17 electrons instead of 18 in Cu (I).