Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 2 Atoms, Molecules, and Ions - 2-3 Isotopes - Review & Check for Section 2-3: 1

Answer

b) 30

Work Step by Step

The atom's mass number is about 55 amu. Because Mn has 25 protons, this means that there are 30 neutrons.
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