Question

How many unpaired electron are there in co3^+

Answer 1

Co electron configuration is [Ar] 4s2 3d7. So when you take away 3 electrons (+3 ion) you get an electron configuration of Co+3 [Ar] 3d6.

so there are 4unpaired electrons

Answer 2

There are zero unpaired electrons present in $Co^{3+}$ ion.

Explanation:

Atomic number of cobalt (Co) is 27 and it is a transition metal. Electronic configuration of cobalt is $[Ar]3d^{7}4s^{2}$. We know that when a neutral atom gain electrons then it acquires a negative charge and when it loses electrons then it acquires a positive charge.

Therefore, in $Co^{3+}$ ion there will be loss of three electrons. Hence, its electronic configuration is $[Ar]3d^{6}$. This means there are no unpaired electrons present in $Co^{3+}$.

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