General Chemistry 10th Edition

Published by Cengage Learning
ISBN 10: 1-28505-137-8
ISBN 13: 978-1-28505-137-6

Chapter 2 - Atoms, Molecules, and Ions - Questions and Problems - Page 82: 2.44

Answer

Atom D is the isotope of atom A.

Work Step by Step

Steps: Isotopes are atoms that have the same number of protons but they have different number of neutrons. In other words isotopes are the atoms that have the same atomic number, but different mass number. We see that only atom D has the same number of protons with atom A, ( 32 protons) but they have different number of neutrons ( 39 neutrons for atom A and 38 neutrons for atom D). Therefore atom D is isotope of atom A.
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