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The number of d-electrons retained in Fe...

The number of d-electrons retained in `Fe^(2+)` (At. No Fe=26) ions are:

A

`3`

B

`4`

C

`5`

D

`6`

Text Solution

Verified by Experts

The correct Answer is:
4
`_(26)Fe=1s^(2), 2s^(2), 2p^(6), 3s^(2), 3p^(6), 3d^(6), 4s^(2)`,
`Fe^(++)=1s^(2), 2s^(2), 2p^(6), 3s^(2), 3p^(6), 3d^(6)`
The number of d-electrons retained in `Fe^(2+)=6`
Therefore, (4) is correct option.
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