Question 18 Nuclear medicine is an important part of cancer treatment. a. [2] A hospital requests 1.25 g of Bismuth-214

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Question 18 Nuclear Medicine Is An Important Part Of Cancer Treatment A 2 A Hospital Requests 1 25 G Of Bismuth 214 1 (22.14 KiB) Viewed 51 times

Question 18 Nuclear medicine is an important part of cancer treatment. a. [2] A hospital requests 1.25 g of Bismuth-214 from a laboratory. Bismuth -214 is a radioactive element with a half- life of 20.0 min. If it takes 3.00 hours to deliver the material to the hospital, determine how many grams of Bismuth-214 the lab would need to ship in order to fulfil this request. b. [3] A 1.785 x 10¹4 Bq source of Cobalt-60 used for cancer therapy is considered too weak to be useful when its activity falls below 1.295 x 10¹4 Bq. Determine how long it takes for this to occur if the half-life of Cobalt-60 is 5.26 yr. Total: 5 Marks