Radiation Revision
Across
- 3. type of radiation the same as a fast moving electron
- 7. charge of a neutron
- 9. most ionising type of radiation the same as a helium nucleus
- 11. when radioactive materials are in physical contact with an object or organism
- 12. charge of a proton
Down
- 1. is the process of exposing an object or organism to nuclear radiation
- 2. an alpha particle consists of two protons and two _____
- 4. when an unstable atom releases radiation
- 5. charge of an electron
- 6. most penetrating type of radiation which is part of the EM spectrum
- 8. the time taken for a radioactive substance to decay to half its original value
- 10. an element is determined by the number of _____ it has