Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Understanding radioactive half life
A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 11.00 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.
radionuclide
sample
initial
radioactivity
symbol
half-life
time for amount of
radionuclide to decrease to
1/32 of initial amount
11
A
20.0 minutes
(choose one)
☐ minutes
6
178
B
Ta
9.0 minutes
(choose one)
☐ minutes
73
194
C
Os
6.0 years
(choose one)
☐ years
76
64
D
Ga
3.0 minutes
(choose one)
☐ minutes
31
1 (highest)
2
☑
3
4 (lowest)
000
18
Ar
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Transcribed Image Text:Understanding radioactive half life A medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 11.00 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. radionuclide sample initial radioactivity symbol half-life time for amount of radionuclide to decrease to 1/32 of initial amount 11 A 20.0 minutes (choose one) ☐ minutes 6 178 B Ta 9.0 minutes (choose one) ☐ minutes 73 194 C Os 6.0 years (choose one) ☐ years 76 64 D Ga 3.0 minutes (choose one) ☐ minutes 31 1 (highest) 2 ☑ 3 4 (lowest) 000 18 Ar
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