he half-life of 222Rn is 3.82 days. (a) Convert the half-life to seconds.      Answer: _______ seconds (b) Calculate the decay constant for this isotope. Answer:____________ s−1 (c) Convert 0.580 μCi to the SI unit the becquerel. Answer:_____________ Bq

College Physics
10th Edition
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter29: Nuclear Physics
Section: Chapter Questions
Problem 19P
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The half-life of 222Rn is 3.82 days.

(a) Convert the half-life to seconds.
     Answer: _______ seconds
(b) Calculate the decay constant for this isotope.
Answer:____________ s−1
(c) Convert 0.580 μCi to the SI unit the becquerel.
Answer:_____________ Bq
(d) Find the number of 222Rn nuclei necessary to produce a sample with an activity of 0.580 μCi.
 Answer:______________222Rn nuclei
(e) Suppose the activity of a certain 222Rn sample is 7.10 mCi at a given time. Find the number of half-lives the sample goes through in 40.2 d and the activity at the end of that period. (Enter your answer for the number of half-lives to at least one decimal place.)
 
Answer:________ half-lives
Answer: mCi
 
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