Which of the following species has (have) five unpaired electron ?

Options

A. Cs
B. Mn
C. `Mn^(2+)`
D. `Fe^(2+)`

Answer

B, C

Explanation

Mn (atomic number `= 25)`
Electronic configuration `= 1s^(2)2s^(2)2p^(6)3s^(2)3d^(6)4s^(2)`
`3d6(2)` `= (##V_PHY_CHM_P1_C04_E01_107_S01.png" width="80%">
`Mn^(2+)`
Electronic configuration `= 1s^(2)2s^(2)2p^(6)3s^(2)3d^(6)4s^(2)`
`3d6(2)` `= (##V_PHY_CHM_P1_C04_E01_107_S02.png" width="80%">
`Mn^(2+)`