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

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kelly226
 2 years ago
Best ResponseYou've already chosen the best response.11 halflife: 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 halflives.

jim_thompson5910
 2 years ago
Best ResponseYou've already chosen the best response.0After 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?
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