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Paper 2 H - SAMPLE SET 1 Q18

18) ​The information below shows information on radioactive isotopes.
Picture
(a) A doctor injects a patient with isotope C to track blood flow through the body.
Use the data to suggest why the doctor uses isotope C. [1]

(b) A doctor implants radioactive isotope A into a patient to treat a localised cancer which is a few mm in size.
She intends to remove the isotope in a few weeks.
Use the data to suggest two reasons why the doctor uses isotope A. [2]

(c) A doctor wants to irradiate a tumour using gamma rays.
Why does the activity of the source need to be checked before it is used on a patient? [2]

​​(​Total for Question 18 = 5 marks)
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