Answer
Cu, Cd, Au, and Co are all transition metals.
Work Step by Step
Transition metals all belong inside the d-block. Those are the only 4 elements listed that belong to the d-block making them the correct answers.
Chemistry (12th Edition)
by Wilbraham
Published by
Prentice Hall
ISBN 10:
0132525763
ISBN 13:
978-0-13252-576-3
Chapter 6 - The Periodic Table - 6.2 Classifying the Elements - 6.2 Lesson Check - Page 173: 17
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