Half life problems and answers pdf
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The first problem has been partially workedin order to help you with the remaining problems) A hospital prepared a mg supply of technetiumm, which has a half-life ofhours HalfLife PracticeWhat is meant by half-life?If you have grams of a radioactive isotope with a half-life ofyears: a. Sample Problem How much 'K will be left in a g sample afterh? The sample ishours old., is one-half of,, so one-half of the Math-word Name Solution Class Half-lifeword problems = time. How many grams (g) of theg sample of Uranium will be left after amillion years _____ bmillion years _____ StepList the given and unknown values. b. c. If 1,0 g of cesium disintegrates over a period ofyears, how many g of cesium would remain? How many grams (g) of theg sample of Uranium will be left after amillion years _____ bmillion years _____Carbon is a radioactive element that ays into Nitrogen The half-life of Carbon is years. StepLook up the half life In Table N, the table of Selected Radioisotopes h StepSet up a table showing the mass, time elapsed, the fraction Uranium has a half-life of million years. The easiest way to solve half life problems is to set up a table. Make sure you find the initial value for each equation. If mg of actinium disintegrates over a HalfLife PracticeWhat is meant by half-life?If you have grams of a radioactive isotope with a half-life ofyears: a. How much of the isotope will you have left after Uranium has a half-life of million years. How much of the isotope will you have left afteryears? How many half-lives will occur inyears?The half-life of plutonium is, the half-life. StepWrite down the equation relating half-life, the number of half-lives, and the ay time, and rearrange it to solve for half-life Because half of the sample has ayed, we know that one half-life has passed, which ishours. New quantity = initial quantity x L = half lifegrams will be left afteryearsgrams will HALF-LIFE PROBLEMS Name BlockAn isotope of cesium (cesium) has a half-life ofyears. A We) rActinium has a half-life ofhours. How much of the isotope will you have left afteryears? What Solve the following half-life problems by writing an equation and using the equation to find the solution.