A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 19.00 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 1/4 of the initial amount. sample A B C D symbol 33 15 188 75 127 54 227 89 radionuclide P Re Xe Ac half-life 25. days 17. hours 36. days 22. years initial radioactivity (choose one) B (choose one) B (choose one) B (choose one) B time for amount of radionuclide to decrease to 1/4 of initial amount. X days hours days years S
A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 19.00 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 1/4 of the initial amount. sample A B C D symbol 33 15 188 75 127 54 227 89 radionuclide P Re Xe Ac half-life 25. days 17. hours 36. days 22. years initial radioactivity (choose one) B (choose one) B (choose one) B (choose one) B time for amount of radionuclide to decrease to 1/4 of initial amount. X days hours days years S
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Chapter20: Nuclear Chemistry
Section: Chapter Questions
Problem 20.27QP
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Understanding radioactive half life
sample
A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 19.00 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.
A
B
C
D
Explanation
symbol
33
15
188
75
127
54
227
89
radionuclide
P
Re
Xe
Ac
Check
half-life
25. days
17. hours
36. days
22. years
initial
radioactivity
(choose one) B
(choose one)
(choose one) O
(choose one) e
time for amount of
radionuclide to decrease to
1/4 of initial amount
X
days
hours
days
years
S
MacBook Pro
0/3
Kimberly V
(
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