1. What is beta radiation?
- A high speed electron
- A low energy single neutron
- A helium nucleus
- An electromagnetic
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2. What is meant by the term 'half-life'
- The time taken for radiation emitted by a source to increase by a half
- The time taken for radiation emitted by a source, to decrease by a half
- When only half of an atom is radioactive
- When radioactive sources don't stay radioactive permanently
3. What is the effect on the mass + atomic number on alpha on the nucleus?
- Atomic number goes down by 2
- Atomic number increases by 2
- No change
4. What does a geiger-muller device do?
- It beeps in the presence of radiation. The more radiation, the more frequent the beeps
- It absorbs all radioactive sources, including alpha, beta and gamma
- It measures the density of lead, which is used to stop gamma penetrating
- It controls the number of radioactive particles in the air
5. How is the penetrating power of an alpha particle reduced?
- With paper or air
- It cannot be reduced
- With a thick layer of lead
- With 3mm of aluminium
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