Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The...
Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The half-life of iodine-131 is 8.04 days. How much time is required for the activity of a sample of iodine-131 to fall to 17.5 percent of its original value?
____days
Nitrogen-13 is used in tracers injected into the bloodstream for
positron emission tomography (PET). The half-life of
nitrogen-13 is 10.0
minutes. If you begin with 45.1
mg of this isotope, what mass remains after 27.2
minutes have passed?
mg
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Iodine-131 is administered orally in the form of NaI(aq) as a
treatment for thyroid cancer. The...
Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET). The half-life...
Nitrogen-13 is used in tracers injected into the bloodstream for positron emission tomography (PET). The half-life of nitrogen-13 is 10.0 minutes. If you begin with 27.1 mg of this isotope, what mass remains after 13.9 minutes have passed? _ mg
3. Iodine-131, which is used to treat thyroid cancer, has a half-life of 8.04 days. How...
3. Iodine-131, which is used to treat thyroid cancer, has a half-life of 8.04 days. How much time is required for 68% of the isotope to decay? a. 13 days b. 7 days c. 43 days d. 53 days e. 4 days
ii. Iodine-131 is a beta-emitting isotope used for treating thyroid cancer. Figure 2 shows a plot...
ii. Iodine-131 is a beta-emitting isotope used for treating thyroid cancer. Figure 2 shows a plot of the radioactive decay of l-131. Use Figure 2 to work out the half-life of I-131 by considering two consecutive half-lives for the isotope. Show your calculations. (3 marks) 250 000 200 000 150 000 number of I-131 nuclei 100 000 50 000 0 0 5 10 20 25 30 35 15 time/days Figure 2 A graph of the radioactive decay of l-131.
3. Iodine-131, which is used to treat thyroid cancer, has a half-life of 8.04 days. How much time is required for 68% of the isotope to decay? a. 13 days b. 7 days c. 43 days d. 53 days e. 4 days
ii. Iodine-131 is a beta-emitting isotope used for treating thyroid cancer. Figure 2 shows a plot of the radioactive decay of l-131. Use Figure 2 to work out the half-life of I-131 by considering two consecutive half-lives for the isotope. Show your calculations. (3 marks) 250 000 200 000 150 000 number of I-131 nuclei 100 000 50 000 0 0 5 10 20 25 30 35 15 time/days Figure 2 A graph of the radioactive decay of l-131.
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