In case of transition metals, certain atoms can lose different numbers of valence electrons, i.e., they show variable electrovalency. The more stable ion is the one which has more stable core except

Options

A. `Fe^(3+)`
B. `Cu^(2+)`
C. `Cu^(+)`
D. `Fe^(2+)`

Answer

B

Explanation

Thus, `Fe^(3+)` salts are more stable than `Fe^(2+)` salts.

However, `Cu^(2+)` salts are more stable than `Cu^(+)` salts on account of higher charge density.