Campbell Biology: Concepts & Connections (9th Edition)

Published by Pearson
ISBN 10: 0-13429-601-X
ISBN 13: 978-0-13429-601-2

Chapter 2 - Review - Page 35: 10


C) 12

Work Step by Step

To find the atomic mass of an atom, add the number of protons to the number of neutrons. 6+6=12 After all, while there are electrons in the atom, they are so light that they are effectively massless compared to the mass of the protons and the neutrons.
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