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31.5 Exercise 2

Avg difficulty 2.5

When P 84 215 o {}_{84}^{215}{\text{P}} \text{o} decays, the product is P 82 211 b. {}_{82}^{211}{\text{P}} \text{b}. The half-life of this decay process is 1.78 ms. If the initial sample contains 3.4 x 1017 parent nuclei, how many are remaining after 35 ms have elapsed? What kind of decay process is this (alpha, beta, or gamma)?

OpenStax College Physics 2e, 31.5 Half-Life and Activity, exercise 2

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Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.