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23 Nov 2019

Cobalt-60, which undergoes beta decay, has a half-life of5.26.

A) How many beta particles are emitted in 200 seconds by a 2.90 mgsample of {60}Co?

B) What is the activity of the sample in Bq?

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Jean Keeling
Jean KeelingLv2
26 May 2019

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Radium-226, which undergoes alpha decay, has a half-life of 1600years.
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I have the answers, but really need to understand the reasoning

Radium-226, which undergoes alpha decay, has a half-life of 1600 yr. (a) How many alpha particles are emitted in 5.0 min by a 10.0-mg sample of 226Ra? (b) What is the activity of the sample in mCi?

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(a) the decay constant, in 1/s, of cobalt-60
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