Chemistry if8766 half life of radioactive isotopes golden education world book document id b50c30f8 golden education world book chemistry if8766 half life of radioactive isotopes description of chemistry if8766 half life of radioactive isotopes sep 28 2019 by wilbur smith best book chemistry if8766 half life of radioactive isotopes . A radioactive half life refers to the amount of time it takes for half of the original isotope to decay for example if the half life of a 500 gram sample is 3 years then in 3 years only 25 grams would remain during the next 3 years 125 grams would remain and so on n t mass of radioactive material at time interval t. Scientists look at half life decay rates of radioactive isotopes to estimate when a particular atom might decay a useful application of half lives is radioactive dating this has to do with figuring out the age of ancient things if you could watch a single atom of a radioactive isotope u 238 for example you wouldnt be able . An interesting and useful aspect of radioactive decay is half life which is the amount of time it takes for one half of a radioactive isotope to decay the half life of a specific radioactive isotope is constant it is unaffected by conditions and is independent of the initial amount of that isotope consider the following example. Chemistry mr nguyen half life of radioactive isotopes answers 1 how much of a 1000 g sample of au 198 is left over after 810 days if its half life is 270 days 2 a 500 g sample of n 16 decays to 125 g in 144 seconds
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