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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
6 Jan 2022

Given information

Mass of a   source.

Step-by-step explanation

Step 1.
The half-life of the substance  is years. At the same time, curie's definition is
 
Using the decay constant $lambda$ and the number of particles, the decay rate may be computed.
 
The decay constant can also be related to the half-life time.
 

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