Answer
Likely to be found in a common ionic compound.
Work Step by Step
Chromium is a transition metal, and it looses one or two electrons to form $Cr^{+}$ and $Cr^{2+}$ ions.
Chemistry: The Molecular Science (5th Edition)
by Moore, John W.; Stanitski, Conrad L.
Published by
Cengage Learning
ISBN 10:
1285199049
ISBN 13:
978-1-28519-904-7
Chapter 2 - Chemical Compounds - Problem Solving Practice 2.6 - Page 57: b
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