Introductory Chemistry (5th Edition)

Published by Pearson
ISBN 10: 032191029X
ISBN 13: 978-0-32191-029-5

Chapter 17 - Radioactivity and Nuclear Chemistry - Exercises - Problems - Page 639: 77

Answer

Ga-67 > P-32 > Cr-51 > Sr-89

Work Step by Step

Given P-32 half life is 14.3 days Cr-51 half life is 27.7 days Ga-67 half life is 78.3 hours Sr-89 half life is 50.5 days. The nuclides having short half lives are most active. So the order of most active to least active is: Ga-67 > P-32 > Cr-51 > Sr-89
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