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Radioactive Decay And Nuclear Radiation (GCSE Physics)

The following is a GCSE Physics test covering 'Radioactive Decay And 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

Which instrument gives information about the type of radiation (alpha, beta, gamma) by using absorbers of different thicknesses and materials?
Why are alpha-emitting sources considered a serious hazard if ingested but less hazardous externally?
The half-life of a certain isotope is 10 minutes. Starting with 8000 atoms, how many atoms remain after 20 minutes (two half-lives)?
Which of the following materials is most effective at stopping alpha particles?
Which is the best safety procedure to avoid contamination when working with open radioactive sources in a lab?
Which absorber would most reduce gamma radiation intensity?
A radioactive sample has an activity of 240 Bq. After one half-life its activity will be:
Which nuclear radiation is a high-energy electromagnetic wave with no mass or charge and is most penetrating?
Which of the following is a correct example of radioactive decay equation for beta minus emission of carbon-14?
A graph of count rate versus time for a decaying source shows an exponential decrease. What does the curve’s shape indicate?
What is the difference between irradiation and contamination?