Answer
b
Work Step by Step
The mass number of the decaying atom does not change, but the number of protons increases, meaning one of the neutrons inside the atom has emitted an electron and decayed into a proton in a beta-minus decay.
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
by Knight, Randall D.
Published by
Pearson
ISBN 10:
0133942651
ISBN 13:
978-0-13394-265-1
Chapter 42 - Nuclear Physics - Stop to Think 42.5 - Page 1229: 1
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