General, Organic, & Biological Chemistry 3rd Edition

Published by McGraw-Hill Education
ISBN 10: 0-07351-124-2
ISBN 13: 978-0-07351-124-5

Chapter 2 - Atoms and the Periodic Table - Problems - Page 43: 2.12

Answer

See the explanation

Work Step by Step

To find the mass number of an atom, you simply add the number of protons and neutrons: Mass Number = Protons + Neutrons a. 42 protons, 42 electrons, 53 neutrons Mass Number = 42 + 53 = 95 b. 24 protons, 24 electrons, 28 neutrons Mass Number = 24 + 28 = 52
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