Iridium-192 is one radioisotope used in brachytherapy, in which a radioactive source is placed inside a pati- cancer. Brachytherapy allows the use of a higher than normal dose to be placed near the tumor while lower damage to healthy tissue. Iridium-192 is often used in the head or breast. Use the radioactive decay curve of iridium-192 to answer the three questions. Sample remaining (%) 100 90. 80. 70. 60 50- 40 30 20 10 ● 0 10 20 30 40 50 80 90 100 110 120 130 140 150 160 170 180 190 Time (days) If the initial sample is 5.25 g, what mass of the original iridium-192 remains after 105 days? 60 ● 70

Iridium-192 is one radioisotope used in brachytherapy, in which a radioactive source is placed inside a pati- cancer. Brachytherapy allows the use of a higher than normal dose to be placed near the tumor while lower damage to healthy tissue. Iridium-192 is often used in the head or breast. Use the radioactive decay curve of iridium-192 to answer the three questions. Sample remaining (%) 100 90. 80. 70. 60 50- 40 30 20 10 ● 0 10 20 30 40 50 80 90 100 110 120 130 140 150 160 170 180 190 Time (days) If the initial sample is 5.25 g, what mass of the original iridium-192 remains after 105 days? 60 ● 70

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Question 5 In the reaction shown, the radiation produced is a(an) 66 Cu → Zn + O a. neutron O b. alpha particle O c. positron O d. beta particle O e. gamma ray
A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 22.00 umol of the radionuclide. First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/4 of the initial amount. time for amount of initial radioactivity radionuclide to decrease to 1/4 of initial amount radionuclide sample symbol half-life 51 Cr 28. days (choose one) v days A 24 179 Ta 2. years (choose one) v years B 73 201 T1 73.0 hours (choose one) v hours 81 46 Sc 84.0 days (choose one) v O days D 21 (choose one) 1 (highest) 4 (lowest)
Fluorine-18, which has a half-life of 110 minmin, is used in PET scans. 2) If 120. mgmg of fluorine-18 is shipped at 7:00 A.M., how many milligrams of the radioisotope are still active when the sample arrives at the radiology laboratory at 4:10 P.M.?
QUESTION 25 237 209B1. How many beta decays are involved in this decay series? Np decays to O a. 2 O b.4 O.5 d. 1 O e. 6 QUESTION 26
This reaction is an example of 210 Po ---> 206 Pb + ________ beta emission electron capture positron emission alpha decay gamma emission
QB- An alien visited our planet in year 5305 and found that humans have long gone from this planet after nuclear war. He found that humanity has destroyed itself in a nuclear war. He analysed a certain chunk of concrete and found 2.5g of 226RA and 6.8g of 206Pb. What was the year of the nuclear war? Hint: 226Ra decays to 206Pb in a number of steps with a combined half-life of 1640 years.
Elements up to what number can be a radioisotope that is naturally occurring? 68 88 92 102
Radioactive isotopes that sit above the band of stability (N/Z too high) are most likely to decay by what mode(s)? Alpha emission Electron capture or beta emission Positron or electron capture Positron or alpha emission Beta emission
The way radioisotopes are useful in treating cancer is due to being easy to detect killing actively growing cancer cells only affecting cancer and not healthy cells being able to react chemically with tumors
14
A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 17.00 µmol of the radionuclide. First, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/32 of the initial amount. 000 radionuclide sample initial radioactivity time for amount of radionuclide to decrease to 1/32 of initial amount Ar days A days B hours C hours D symbol 192 Ir 77 188 74 62 30 67 31 W Zn Ga half-life 74.0 days 69.0 days 9.0 hours 78.0 hours (choose one (choose one) (choose one) (choose one) X ?
Help with this chemistry subject:))