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    semra1997's Avatar
    semra1997 Posts: 6, Reputation: 1
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    #1

    Mar 18, 2012, 04:28 PM
    If you have 500 grams of isotopes, how many would you have after 54 minutes?
    If you started with 500 grams of isotope, how many grams would you have after 54 minutes?
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
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    #2

    Mar 18, 2012, 04:59 PM
    Can you explain in more detail? Istopes decay at different rates.
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #3

    Mar 19, 2012, 11:00 AM
    It depends on the half life of the isotope. If the half life is 54 minutes, then after 54 minutes the original 500 grams would have decayed to leave only half the original amount, or 250 grams of the isotope.
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