Chemistry (4th Edition)

Published by McGraw-Hill Publishing Company
ISBN 10: 0078021529
ISBN 13: 978-0-07802-152-7

Chapter 2 - Questions and Problems - Page 77: 2.41

Answer

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Work Step by Step

A Carbon-12 atom is 12 amu. However, it is reported as 12.01 on the periodic table since Carbon has more massive isotopes as well. The number reported on the periodic table is the average mass of an isotope of that element.
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