13) The activity of a radioactive sample is the number of decay events per second. The Sl unit of activity is the becquerel (1 Bq = 1/s). An older unit for activity is the curie (1 Ci = 3.70 x 10"/s). What is the activity in Bq of a sample with an activity of 47 uCi of radiation? (1 Ci = 10ª uCi) а) 7.9 х10° Вg с) 1.7х 10 Вq b) 7.9х 10° Bg d) 1.3 x 10-м Ва

Many elements have been synthesized by bombarding relatively heavy at particle accelerators. Complete the following nuclear reaction, which have elements. + 15N → 269Db + 4 n 105 Example of answer: If your answer is 14, write it as 14N (it is clear tha protons, so the number 7 might be skipped). If your answer is n (neutror For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph V Arial M 10pt Click Save and Submit to save and submit. Click Save All Answers to save all answers.

(Q114) A meteorite recovered from a meteor landing site in the Australian outback contains 0.438 g of lead-206 for every 1.000 g of uranium-238 that it contains. Assuming the rock did not originally contain any lead-206, how old is the meteorite? (The half-life for this decay process is 4.5 x 10⁹ years). 2.3 x 10⁹ years 2.7 x 10⁹ years 4.4 x 10⁹ years O 1.5 x 1010 years O 7.1 x 10⁹ years

Iodine-125 (¹251) is used to treat, among other things, brain tumors and prostate cancer. It decays by gamma decay with a half-life of 54.90 days. Patients who fly soon after receiving ¹25I implants are given medical statements from the hospital verifying such treatment because their radiation could set off radiation detectors at airports. If the initial decay rate (or activity) was 517 µCi, what will the rate be after 381.0 days? decay rate: μCi How many months after the treatment will the decay rate be reduced to 10.5% of the original value? Assume months of 30 days. months:

¹C 18F 51 Cr 50Fe Ga Se 81mKr Sr 99m Tc 1331 19Hg 20171 Some Radioactive Isotopes Useful in Medical Imaging Mode of Decay Isotope Carbon-11 Fluorine-18 Phosphorus-32 Chromium-51 Iron-59 Gallium-67 Selenium-75 Krypton-81m Strontium-81 Technetium-99m Iodine-131 Mercury-197 Thallium-201 B+, Y B+ , Y B E.C., y B, Y E.C., Y E.C., Y Y В Y B, Y E.C., Y E.C., Y Half-life 20.3 m 109 m 14.3 d 27.7 d 44.5 d 78.3 h 118 d 13.3 s 22.2 m 6.01 h 8.04 d 64.1 h 3.05 d Use in Medical Imaging Brain scan to trace glucose metabolism Brain scan to trace glucose metabolism Detect eye tumors Diagnose albinism, image the spleen and gastrointestinal tract Bone marrow function, diagnose anemias Whole-body scan for tumors Pancreas scan Lung ventilation scan Scan for bone diseases, including cancer Brain, liver, kidney, bone scans; diagnosis of damaged heart muscle Diagnosis of thyroid malfunction Kidney scan Heart scan and exercise stress test The radioactive isotope mercury-197 is used in medical imaging as…

What quantity of energy would be produced as 1 atom of plutonium-238 undergoes alpha decay?

Using activity to radiodate GChegg Search 05 Emil The half life for the decay of carbon-14 is 5.73 × 10 years. Suppose the activity due to the radioactive decay of the carbon-14 in a tiny sample of an artifact made of wood from an archeological dig is measured to be 3.9 x 103 significant digits. Bq. The activity in a similar-sized sample of fresh wood is measured to be 7.5 × 10° Bq. Calculate the age of the artifact. Round your answer to 2 Ilyears 02022 McGraw Hill LLC. All Rights Reserved. Terms of Use P Check Explanation stv APR 24 Dro

A 0.500 g sample of rock was found to have 2.45 × 10-6 mol of potassium-40 (t1/2 = 1.3 × 109 yr) and 2.45 × 10-6 mol of argon-40. How old was the rock?

can someone please answer these questions

A sample of drinking water collected from a suburban Boston municipal water system in 2002 contained 0.49  pCi/L of radon. Assume that this level of radioactivity was due to the decay of 222Rn (t1/2 = 3.8 days). What was the level of radioactivity of this nuclide in the sample? (Bq/L) How many disintegrations per hour would occur in 2.5 L of the water? (disintegrations/L)