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

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kelly226Best ResponseYou've already chosen the best response.1
1 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.
 one year ago

jim_thompson5910Best ResponseYou've already chosen the best response.0
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?
 one year ago
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