The Maths and Science Tutor
Email: fiaraziqbal@googlemail.com
Phone: 07760257814
Total marks: 16
Time allowed: 20 minutes
[1 mark]
1. What type of radiation is stopped by a sheet of paper?
[2 marks]
2. Complete the following sentence:
Radioactive decay is a _______ process where an unstable nucleus releases _______ to become more stable.
[1 mark]
3. Which of these is the correct unit for measuring the activity of a radioactive source?
A) Joules
B) Becquerels
C) Hertz
D) Watts
[2 marks]
4. State two ways to protect yourself from gamma radiation.
[2 marks]
5. If a radioactive sample has a half-life of 4 days, how much of a 100g sample will remain after 8 days?
Show your working:
[2 marks]
6. What is contamination? Give one example.
[1 mark]
7. Which type of radiation has the greatest penetrating power?
[2 marks]
8. A Geiger counter clicks more rapidly near a radioactive source. Explain why.
[2 marks]
9. State two uses of radioactivity in medicine.
[1 mark]
10. What happens to the atomic number of an element after it emits an alpha particle?
End of questions