Map d Sapling Learning ridium-192 is one radioisotope used in brachytherapy, in

Question

Map d Sapling Learning ridium-192 is one radioisotope used in brachytherapy, in which a radioactive source is placed inside a patient's body to treat cancer. Brachytherapy allows higher than norm dose to be placed near al the tumor w e lowering the risk of damage to healthy tissue. Iridium-192 is often used in the head or breast Answer the following three questions (a, b, and c) based on the radioactive decay curve of iridium-192 shown below. Click on the graph and move the mouse over a point to get values for that point. Sample remaining 10 90 200 Time (days)

Explanation / Answer

a) final mass = 30% of initial mass

= 0.30*2 = 0.6 g

b) half live = 75 days

c) 150 days

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