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Half-life radioactivity

  1. Dec 16, 2008 #1
    1.Explain why if a sample has a very short half-life, then it will be more radioactive than an element that has a longer half-life, any clues anyone?
     
  2. jcsd
  3. Dec 16, 2008 #2

    mgb_phys

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    What is the half life ?
    If you start with a 1000 atoms how many will decay in an hour if the element has a half-life of an hour?
    How many if the element has a half life of 2 hours?
     
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