Chemistry: The Molecular Science (5th Edition)

Published by Cengage Learning
ISBN 10: 1285199049
ISBN 13: 978-1-28519-904-7

Chapter 18 - Nuclear Chemistry - Questions for Review and Thought - General Questions - Page 817d: 70c


$\,^{59}Fe\rightarrow\text{beta particle}+\,^{59}Co$

Work Step by Step

Let the missing reactant be $\,^{A}_{Z}X$. The emission of a beta particle results in a unit increase in atomic number but the mass number remains constant. Therefore, $A=59$ $Z$ of $Co$=$Z+1$ or $Z=27-1=26$ $X$ is the symbol of the element with an atomic number of 26. That is, $X=Fe$. The missing reactant is $\,^{59}Fe$.
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