Sa Resou Question 32 of 3s > Iridium-192 is one radicisotope used in brachytherapy, in which a radioactive source is placed in cancer. Brachytherapy allows the use of a higher than normal dose to be placed near the tumor w to bealthy tissue. Iridium-192 is often used in the head or breast. Use the radioactive decay curve of iridium- 192 to answer the three questions Ir the initial sample is 7.25 . what mas of the original iridium 192 renains afer 5 days?

I Review I Constants I Periodic Table Every radioactive isotope decays at a certain rate. It is never known when a given nucleus will decay, but if many nuclei are gathered together, as a group they will decay at a measurable and consistent rate. A radioactive Part A half-life is the time it will take for half of the nuclei to Phosphorus-32 has a half-life of 14.0 days. Starting with 8.00 g of 32P, how many grams will remain after 98.0 days ? decay. Express your answer numerically in grams. • View Available Hint(s) ? Submit Part B Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C has decayed to 1/4.00 of the original amount. How long ago was this plant alive? Express your answer numerically in years. View Available Hint(s) yеars Submit

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Mass defect and binding energy of potassium 39