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 - Study Questions: 18

Answer

All but $_{18}^{9}X$ are isotopes of X.

Work Step by Step

Since the element has an atomic number of 9, all species with an atomic number of 9 are X's isotopes, so all but $_{18}^{9}X$ are isotopes of X.
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