Answer
6 electrons in valence orbital
Work Step by Step
Ground state electronic configuration of Co is $[Ar]3d^{7}4s^{2}$. It loses three electrons to form $Co^{3+}$ ion with electronic configuration of $[Ar]3d^{6}$
Chemistry: The Central Science (13th Edition)
by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.
Published by
Prentice Hall
ISBN 10:
0321910419
ISBN 13:
978-0-32191-041-7
Chapter 23 - Transition Metals and Coordination Chemistry - Exercises - Page 1033: 23.16a
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
