We are being asked to write the electron configuration of neutral Co, Co2+, and Co3+ and how many of unpaired electrons each has. Let’s first write the electron configuration of neutral Co atom.
Neutral element: Atomic number = # protons = # of electrons
Neutral Cobalt (Co):
Give the complete electron configuration of cobalt, Co, the complete or abbreviated electron configuration, of Co2+, and Co3+, and predict the number of unpaired electrons in all three.
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