Answer
C) Only H2O is a compound.
Work Step by Step
A compound, by definition, is made up of more than one type of element, so H-H and O-O are not compounds.
Campbell Biology: Concepts & Connections (9th Edition)
by Taylor, Martha R.; Simon, Eric J.; Dickey, Jean L.; Hogan, Kelly A.; Reece, Jane B.
Published by
Pearson
ISBN 10:
0-13429-601-X
ISBN 13:
978-0-13429-601-2
Chapter 2 - Review - Page 35: 5
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