Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 21 - Nuclear Chemistry - Exercises - Page 947: 21.21b


Bismuth - 208 is radioactive. Its one less neutron (125 to 126) places it outside the band of stability.

Work Step by Step

Bismuth - 209 is stable because it has the perfect neutron to proton ratio for stability.
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