Problem 3. Radium-226, which undergoes alpha decay, has a half-life of 1600yr. (a) How many alpha particles areemitted in 5.0 min by a 10.0-mg sample of 226 Ra ? (b) What is the activity of the sample in mCi ?Problem 4. Cobalt-60, which undergoes beta decay, has a half-life of 5.26yr. (a) How many beta particles are emitted in600 s by a 3.75 – mg sample of "Co ? (b) What is the activity of the sample in Bq?

According to the question, Radium has half life 1600 year. Mass of radium sample = 10.0 mg Let…

Answered: ich undergoes alpha decay, has a…

ich undergoes alpha decay, has a half-life of 1600yr. (a) How many alpha particles ar g sample of 225 Ra ? (b) What is the activity of the sample in mCi ?

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter18: The Nucleus: A Chemist's View

Section: Chapter Questions

Problem 78CWP

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Question

Problem 3. Radium-226, which undergoes alpha decay, has a half-life of 1600yr. (a) How many alpha particles are
emitted in 5.0 min by a 10.0-mg sample of 226 Ra ? (b) What is the activity of the sample in mCi ?
Problem 4. Cobalt-60, which undergoes beta decay, has a half-life of 5.26yr. (a) How many beta particles are emitted in
600 s by a 3.75 – mg sample of "Co ? (b) What is the activity of the sample in Bq?

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