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Uses Of Nuclear Radiation (GCSE Physics)

The following is a GCSE Physics test covering 'Uses Of Nuclear Radiation' from the broader topic Atomic Structure. The test is geared towards the AQA exam board style syllabus.
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Below a typical questions that will be covered in this test. You final score will be logged on your account

If a radioisotope has a half-life of 10 years, what fraction of the original activity remains after 30 years?
Which of the following statements correctly compares irradiation and contamination?
A sample has an activity of 400 Bq. After one minute (60 s), approximately how many decays would you expect to occur?
Which of the following would be the best immediate precaution to reduce exposure risk when handling a sealed gamma source?
What does the unit becquerel (Bq) measure?
Which type of nuclear radiation is a helium nucleus (two protons and two neutrons)?
Carbon-14 has a half-life often used in radiocarbon dating. If a sample originally had 1000 atoms of C-14 and three half-lives have passed, how many C-14 atoms remain?
Which of these materials would be a suitable shield for reducing gamma radiation exposure in a laboratory?
What is a common industrial use of beta radiation?
Which protective measure most reduces the radiation dose by increasing the distance from a source?
A sample’s measured activity falls from 1600 Bq to 400 Bq in 20 minutes. What is the half-life of this sample?