nuclear radiation - test

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Questions

1. What particles are found in the nucleus of an atom?

  1. Protons and neutrons.
  2. Protons and electrons.
  3. Neutrons and electrons.


2. A teacher used a Geiger counter to measure the radiation of a radioactive rock. Wrapping the rock in paper and aluminium foil had no effect on the count rate. This tells us the rock emits:

  1. alpha radiation
  2. beta radiation
  3. gamma radiation.


3. Which type of radiation will penetrate paper and aluminium foil, but not many centimetres of lead?

  1. Alpha.
  2. Beta.
  3. Gamma.


4. How can you change the rate of emission of radiation from a radioactive object?

  1. Heat it up.
  2. Put it under pressure.
  3. You cannot change the rate of emission.


5. The half-life of an isotope is one hour. How long will it take for the count rate to fall to a quarter of the starting rate?

  1. One hour.
  2. Two hours.
  3. Four hours.


6. What happens to the half-life of a substance when it is put in a freezer?

  1. It slows down.
  2. It speeds up.
  3. It stays the same.


OCR: higher tier only

7. Isotopes of an element have different numbers of:

  1. protons
  2. electrons
  3. neutrons.


8. What happens when a nucleus splits?

  1. A chemical reaction occurs.
  2. Radiation is released.
  3. A bigger nucleus is formed.


Answers

1A, 2C, 3C, 4C, 5B, 6C, 7C, 8B

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