How many unpaired electrons are there on a Co +2 ion?

Cobalt (Co) has an atomic number of 27, with an electron configuration of [Ar] 3d^7 4s^2. When it loses two electrons to form Co^2+, the electrons are removed from the 4s orbital first, resulting in [Ar] 3d^7. In the 3d subshell, there are 3 unpaired electrons.

How many unpaired electrons are there on a Co +2 ion?

Cobalt (Co) has an atomic number of 27, with an electron configuration of [Ar] 3d^7 4s^2. When it loses two electrons to form Co^2+, the electrons are removed from the 4s orbital first, resulting in [Ar] 3d^7. In the 3d subshell, there are 3 unpaired electrons.