Answer
50 neutrons
Work Step by Step
The first daughter nucleus has 39 protons.
From Appendix F, the name of the first daughter nucleus is Yttrium.
From Figure 42-5, we can see that a nucleus with 39 protons has approximately 50 neutrons.
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 42 - Nuclear Physics - Problems - Page 1302: 6c
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