Paper 2 H - SAMPLE SET 1 Q18
18) The information below shows information on radioactive isotopes.
(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)
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)