Answer
10 electrons in valence orbital
Work Step by Step
Ground state electronic configuration of Cu is $[Ar]3d^{10}4s^{1}$. It loses one electron to form $Cu^{+}$ ion with electronic configuration of $[Ar]3d^{10}$
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: 23.16b
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