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rrivera5754

  • 3 years ago

What fraction of a given sample of radioactive nuclide remains after four half lives??

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  1. rrivera5754
    • 3 years ago
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    @kelly226

  2. kelly226
    • 3 years ago
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    1 half-life: 1/2 left 2: half of that, or 1/4 3: half of that, or 1/8 4: half of that, or 1/16 In general: (1/2)^x, where x is the number of half-lives.

  3. jim_thompson5910
    • 3 years ago
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    After one half life, half of the substance is gone. After another half life, half of the remaining amount is gone. So you have (1/2)*(1/2) = 1/4 of the amount left over After another half life, half of the remaining amount is gone. So you have (1/2)*(1/2)*(1/2) = 1/8 of the amount left over See where this is going?

  4. rrivera5754
    • 3 years ago
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    THANKS!

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