Krypton-81 has a half-life of 2.29 × 105 years. A 750-mg sample of Krypton-81 undergoes electron capture. a. Write the reaction involving the electron capture of Krypton-81. b. How many half-lives would it take for the initial amount of Krypton-81 to become 2.9297 mg? Report your answer to the nearest whole number. c. Using the complete value of your answer in b, how many years would it take for the initial amount of Krypton- 81 to become 2.9297 mg? d. After 5.0 × 105 years, how much of the sample of Krypton-81 would remain?
Krypton-81 has a half-life of 2.29 × 105 years. A 750-mg sample of Krypton-81 undergoes electron capture. a. Write the reaction involving the electron capture of Krypton-81. b. How many half-lives would it take for the initial amount of Krypton-81 to become 2.9297 mg? Report your answer to the nearest whole number. c. Using the complete value of your answer in b, how many years would it take for the initial amount of Krypton- 81 to become 2.9297 mg? d. After 5.0 × 105 years, how much of the sample of Krypton-81 would remain?
Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter21: Nuclear Chemistry
Section: Chapter Questions
Problem 34E: The isotope 208Tl undergoes decay with a half-life of 3.1 min.. (a) What isotope is produced by the...
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Krypton-81 has a half-life of 2.29 × 105 years. A 750-mg sample of Krypton-81 undergoes electron capture.
a. Write the reaction involving the electron capture of Krypton-81.
b. How many half-lives would it take for the initial amount of Krypton-81 to become 2.9297 mg? Report
your answer to the nearest whole number.
c. Using the complete value of your answer in b, how many years would it take for the initial amount of Krypton-
81 to become 2.9297 mg?
d. After 5.0 × 105 years, how much of the sample of Krypton-81 would remain?
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