Question

The number of unpaired electrons in ferrous ion is.

• A. 5
• B. 4
• C. 3
• D. 2

Answer 1

Answer: (B)

4

Answer 2

$Fe^{2 +}$ ion have 4 unpaired electrons

$Fe^{2 +} = 26 - 2 = 24 = 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{6}$