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Iridium-192 is one radioisotope used in brachytherapy, in which a radioactive source is placed inside a patient's body to treat cancer. Brachytherapy allows the use of a higher than normal dose to be placed near the tumor while lowering the risk of 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. 100 90 - 80 70 - 60 - 50 - 40 - 30 - 20 - 10- 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 Time (days) If the initial sample is 4.50 g, what mass of the original iridium-192 remains after 35 days? Sample remaining (%)

Iridium-192 is one radioisotope used in brachytherapy, in which a radioactive source is placed inside a patient's body to treat cancer. Brachytherapy allows the use of a higher than normal dose to be placed near the tumor while lowering the risk of 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. 100 90 - 80 70 - 60 - 50 - 40 - 30 - 20 - 10- 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 Time (days) If the initial sample is 4.50 g, what mass of the original iridium-192 remains after 35 days? Sample remaining (%)

Chemistry for Engineering Students
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter14: Nuclear Chemistry
Section: Chapter Questions
Problem 14.36PAE
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If the initial sample is 4.50 g, what mass of the original iridium-192 remains after 35 days? mass remaining: Estimate the half-life of the radioisotope. half-life: days How many days would it take for two-thirds of the sample to decay? time: days
Transcribed Image Text:If the initial sample is 4.50 g, what mass of the original iridium-192 remains after 35 days? mass remaining: Estimate the half-life of the radioisotope. half-life: days How many days would it take for two-thirds of the sample to decay? time: days
Iridium-192 is one radioisotope used in brachytherapy, in which a radioactive source is placed inside a patient's body to treat cancer. Brachytherapy allows the use of a higher than normal dose to be placed near the tumor while lowering the risk of 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. 100- 90 - 80 – 70 - 60 - 50 - 40 - 30 - 20 - 10 - 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 Time (days) If the initial sample is 4.50 g, what mass of the original iridium-192 remains after 35 days? Sample remaining (%)
Transcribed Image Text:Iridium-192 is one radioisotope used in brachytherapy, in which a radioactive source is placed inside a patient's body to treat cancer. Brachytherapy allows the use of a higher than normal dose to be placed near the tumor while lowering the risk of 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. 100- 90 - 80 – 70 - 60 - 50 - 40 - 30 - 20 - 10 - 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 Time (days) If the initial sample is 4.50 g, what mass of the original iridium-192 remains after 35 days? Sample remaining (%)
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