Across
- 1. A type of radiation made up of the nucleus of a helium atom
- 3. The time taken for half of a number of radioisotopes to decay
- 4. Part of an atom, found in the nucleus, has a positive charge
- 7. This is the main way of detecting ionisation radiation
- 9. This has the same mass as an electron but has a positive charge
- 10. When atoms have the same number of protons, but different numbers of electrons, they are called this
- 12. A radioactive isotope is called this for short
Down
- 1. The type of radiation emitted with the lowest penetration power
- 2. This is the main way of detecting non-ionising radiation
- 5. A type of radiation made up of fast moving electrons
- 6. I have no charge and reside in the nucleus of an atom
- 7. The type of radiation emitted with the highest penetration power
- 8. This word describes unstable elements that lose particles to try to become stable
- 11. This word describes different types of the same atom which have the same number of protons, but different numbers of neutrons