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Q.

In the ground state of cobalt atom (Z = 27), there are …. unpaired electrons and thus the atom is

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a

3, paramagnetic

b

2, paramagnetic

c

3, diamagetic

d

2, diamagnetic

answer is A.

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Detailed Solution

Co−Ar3d74s2, it has 3 unpaired e− so it is a paramagnetic.

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In the ground state of cobalt atom (Z = 27), there are …. unpaired electrons and thus the atom is