206 °Hg. If you start with Pb has a half-life of 22.3 years and decays to produce 8.79 g of 210 210 Pb, how many grams 206 Hg will you have after 14.3 years? of 3.09 g 5.64 g 11.3 g 2.82 g 10.9 g

Sodium-24 has a half-life of 14.8 hours. How much of a 595.7 mg sodium-24 sample will remain after 3.7 days? mass remaining: mg about us careeis- privacy policy terms of use contact us help 8:11 PM 4/28/2021 12 insert t9 f8 立

The half‑lives of different medical radioisotopes are given in the table. If the initial amount of chromium‑51 is 133 mCi, how much chromium‑51 is left in the body after 84 days? Radioisotope Half‑life (days) arsenic‑74 18 iodine‑131 8 phosphorus‑32 14 chromium‑51 28

Radioactive vanadium-48 decays with a half-life of 16.0 days. a. What is the value of k in s? k = b. A sample contains 84.0 mg *°V. How many decay events will be produced in the first second? Assume the atomic mass of **V is 48.0 u. decays/s c. A chemist obtains a fresh sample of 48 V and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 25% of the initial measured value. How long does she have to do the experiment? days

Exposure to radioactive material is considered safe after 10 half-lives because

The half-lives of different radioisotopes are given in the table. Half-life (min) Radioisotope argon-44 lead-196 time: potassium-44 indium-117 How long would it take, in minutes, for the amount of argon-44 to decrease from 64.0 mg to 8.00 mg? ADI 12 37 22 43 NOV 1 C min C 3:37 1 ()))

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If Bismuth-210 has a half-life of 5.0 days and you started with 30.59 grams then how many grams of Polonium-210 has formed after 6.25 hours. 21083Bİ - A + 210 84P0 and then 21084PO → B + 206. °82Pb 1.0624 1.1825 1.1274 0.9462 0.9674 1.1458 1.1095

The radioactive isotope Cr decays by beta emission. 56 24 If the mass of a sample of chromium-56 decays from 85.8 micrograms to 21.5 micrograms in 11.8 minutes, what is the half-life of chromium-56? Half-life = minutes Submit Answer Retry Entire Group 2 more group attempts remaining