Answer
The number of protons in this isotope is 81, and it has 112 neutrons.
Work Step by Step
The number of neutrons is found by simply subtracting the atomic number from the mass number. (Top - bottom)
Chemistry: The Central Science (13th Edition)
by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.
Published by
Prentice Hall
ISBN 10:
0321910419
ISBN 13:
978-0-32191-041-7
Chapter 21 - Nuclear Chemistry - Exercises - Page 947: 21.9b
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