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The number of unpaired electrons in coba...

The number of unpaired electrons in cobalt atoms is (atomic number of Co= 27)

A

2

B

3

C

4

D

1

Text Solution

Verified by Experts

The correct Answer is:
B
Electronci configuration of `""_(27)Co.`
`1s^(2) 2s^(2) sp^(6) 3p^(6) 3d^(7) 4s^(2),`
hence unpaired `e^(-)=3`
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