Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 2 - Sections 2.1-2.9 - Exercises - Problems by Topic: 73

Answer

F-19 has a very large percent abundance which explains why the atomic mass of fluorine is nearly 19.00 amu and there is a peak near here on its mass spec.

Work Step by Step

Cl-35 and Cl-37 both have significant percent abundances, therefore, its atomic mass is the weighted average, which occurs somewhere in between these two masses. Therefore, the mass spectrum does not peak here.
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