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Thread: How do i solve this?

  1. #1 How do i solve this? 
    Forum Freshman
    Join Date
    Oct 2006
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    28
    I got an exam tomorrow, and since I missed the last week, I don't really know how to solve questions like these:

    1 gramm of Ra-226 radiates 3,7*10^10 alpha-particles in a second. Find out the half-life period of Ra-226.

    We produce a radioactive Cu-64 and seal it. After 20 days, the activity is 20 Bq. What was the mass in gramm of the Cu-64 when we produced it?

    Answers and explanations would be greatly appreciated,

    Thanks,


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  3. #2  
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    Sep 2006
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    Do you know how many alpha particles per decaying atom?


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