The graph represents the decay curve of a radioactive isotope call Strontium 90 (grams) 100 75 50 25 0 0 25 50 75 100 125 150 175 Time (years) What is the half-life of this isotope? A. 8 years
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- The half-life of a radioactive isotope is the time it takes for half of the radioactive atoms in a sample to decay. Show more…
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The graph below shows activity vs time for a radioactive isotope. In this case, the activity is given as a percentage of the initial count rate (decays per time) at t = 0. (a) Estimate the half-life of this isotope in units of days. (b) Use your value of half-life to calculate the time constant.
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Strontium-90 has a half-life of 28 days. (a) A sample has a mass of 50 mg initially. Find a formula for the mass remaining after t days. (b) Find the mass remaining after 40 days. (c) What is the rate of decay after 40 days? (d) How long does it take the sample to decay to a mass of 2 mg? (e) Sketch the graph of the mass function.
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Use the graph below to answer questions. (GRAPHS CANNOT COPY) Assuming that you can only date material that has at least one percent of the radioisotope remaining, which age would be too old to date with this isotope? A. 35 years B. 50 years C. 75 years D. 125 years
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