1.

In the ground state of cobalt atom `(Z=27)`, there are ..... Unpaired electrons and thus the atom is ....A. `3`,paramageneticB. `2`, paramageneticC. `3` diamageneticD. `2` diamagnetic

Answer» Correct Answer - B
`Co-[Ar]3d^(7)4s^(2)`, it has 3 unpaired `e^(-)` so it is a paramagnetic.


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