Across
- 1. The structure made from sub-atomic particles.
- 4. An unstable nucleus will _________ (split up) during radiation.
- 6. Type of radiation that is a high energy electromagnetic wave.
- 8. Nuclei that are ________ _______ are likely to release beta particles.
- 11. Materials that are radioactive have nuclei that are ____________.
- 12. Gamma rays have a very ________ frequency.
- 13. During beta decay, the atomic number increases by ______.
- 15. The charge of an alpha particle
- 16. Gamma rays have a very ________ wavelength.
- 17. Type of radiation that is made up of a fast moving electron.
- 18. Piece of equipment used to measure radiation.
- 19. Emitting gamma rays causes a nucleus to ________ it's energy state.
- 20. The part of the atom that contains protons and neutrons
- 21. Nuclei that are _______ _________ are likely to release alpha particles.
Down
- 2. During alpha decay, the __________ __________ of the element decreases by 4.
- 3. Term used to describe materials that give out nuclear radiation
- 5. During alpha decay the _________ __________ of the element decreases by 2.
- 7. Type of radiation that is made up of two protons and two neutrons.
- 9. The time taken for half of the nuclei in a radioactive material to decay.
- 10. The release of radiation by unstable nuclei is known as __________ ____________.
- 14. In beta decay, a ________ changes into a proton and an electron.