Across
- 1. A type of radiation that is high-energy electromagnetic waves.
- 3. Atoms of the same element with the same number of protons but different numbers of neutrons.
- 4. A type of radiation made of a fast-moving electron from the nucleus.
- 5. The time taken for half of the radioactive atoms in a sample to decay.
- 6. When an unstable nucleus breaks down and gives out radiation.
- 7. A type of radiation made of 2 protons and 2 neutrons
Down
- 2. How many atoms decay each second (measured in becquerels, Bq)
- 4. The unit of activity.