## Conceptual Physics (12th Edition)

Published by Addison-Wesley

# Chapter 34 - Think and Explain - Page 654-655: 51

#### Answer

The mass of an atomic nucleus is less than the sum of the masses of the component nucleons that make it up.

#### Work Step by Step

Work must be done (i.e., energy must be added) to separate a nucleus into its nucleons. According to $E = mc^{2}$, this adds mass to the system. The separated nucleons are more massive than the original nucleus.

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.