d) Below is a decay curve for iodine-131. This is used in the treatment of thyroid cancer. Radioactive iodine should not remain in the body at high levels. A safe amount of 2 g of iodine- 131 remaining in the body after 24 days. Considering the decay rate, use the graph below to work out the largest safe mass of iodine-131 that should be used for treatment? lodine 131 parent isotope % 120 100 80 60 40 lodine 131 decay 20 0 10 20 30 40 50 60 Time (days)
d) Below is a decay curve for iodine-131. This is used in the treatment of thyroid cancer. Radioactive iodine should not remain in the body at high levels. A safe amount of 2 g of iodine- 131 remaining in the body after 24 days. Considering the decay rate, use the graph below to work out the largest safe mass of iodine-131 that should be used for treatment? lodine 131 parent isotope % 120 100 80 60 40 lodine 131 decay 20 0 10 20 30 40 50 60 Time (days)
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I'm getting mixed answers of either 16 or 20. Please advise.
Transcribed Image Text:d) Below is a decay curve for iodine-131. This is used in the treatment of thyroid cancer.
Radioactive iodine should not remain in the body at high levels. A safe amount of 2 g of iodine-
131 remaining in the body after 24 days. Considering the decay rate, use the graph below to
work out the largest safe mass of iodine-131 that should be used for treatment?
lodine 131 parent isotope %
120
100
80
60
40
lodine 131 decay
20
0
10
20
30
40
50
60
Time (days)
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