Chemistry (12th Edition)

Published by Prentice Hall
ISBN 10: 0132525763
ISBN 13: 978-0-13252-576-3

Chapter 4 - Atomic Structure - 4.3 Distinguishing Among Atoms - 4.3 Lesson Check: 33

Answer

Argon-40

Work Step by Step

The atomic mass of Argon is 39.95 so when we round the mass, we get 40. Thus the most abundant isotope is Argon-40
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