College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 29 - Multiple-Choice Questions - Page 1116: 1

Answer

The correct answer is: (c) The Pb nucleus is more massive than the Al nucleus.

Work Step by Step

An atom of lead has 82 protons and 125 neutrons in the nucleus. An atom of aluminum has 13 protons and 14 neutrons in the nucleus. Since the volume of a lead atom is only a little larger than the volume of an aluminum atom, lead has a greater density because the nucleus of a lead atom is more massive than the nucleus of an aluminum atom. The correct answer is: (c) The Pb nucleus is more massive than the Al nucleus.
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