Hazards and uses of radioactive emissions Practice Questions
Question 1
Q1. Knowledge Recall (1 mark)
Define the term 'ionising radiation'.
Question 2
Q2. Application (2 marks)
Explain how radiation can damage living cells.
Question 3
Q3. Calculation (3 marks)
A sample of radioactive material has an activity of 1000 decays per second. Calculate the number of decays that occur in 1 minute.
Question 4
Q4. Knowledge Recall (1 mark)
Name two uses of gamma radiation in medicine.
Question 5
Q5. Application (2 marks)
Explain why alpha radiation is not used for medical imaging.
Question 6
Q6. Calculation (3 marks)
A radioactive isotope has a half-life of 20 days. If there are initially 1000 atoms of the isotope present, calculate the number of atoms remaining after 60 days.
Question 7
Q7. Knowledge Recall (1 mark)
State the type of radioactive emission that is most penetrating.
Question 8
Q8. Application (2 marks)
Explain why it is important to dispose of radioactive waste safely.
Question 9
Q9. Calculation (3 marks)
A patient receives a dose of 2 mSv of radiation during a medical procedure. Calculate the equivalent dose in Gy.
Question 10
Q10. Knowledge Recall (1 mark)
Name one natural source of radiation.