Answer
Scandium has has one 3d electron in the free element but none in any of its common oxidation states.
Work Step by Step
As above
Chemistry: Principles and Practice (3rd Edition)
by Reger, Daniel L.; Goode, Scott R.; Ball, David W.
Published by
Cengage Learning
ISBN 10:
0534420125
ISBN 13:
978-0-53442-012-3
Chapter 19 - Transition Metals, Coordination Chemistry, and Metallurgy - Questions and Exercises - Exercises - Page 860: 19.15
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