Across
- 2. man made radioactive element used in reactors
- 3. material used to block radiation
- 7. neutral particle in nucleus
- 9. time for half of a radioactive sample to decay
- 10. high energy electromagnetic radiation
- 12. splitting of a nucleus into smaller parts
- 13. energy emitted as particles or waves
- 15. negatively charged particle orbiting nucleus
- 16. combining of nuclei to form a larger nucleus
- 17. presence of radioactive substances where unwanted
- 19. process by which unstable nuclei lose energy
- 21. low level radiation always present in environment
- 23. device used to detect radiation
- 24. atoms of same element with different neutrons
Down
- 1. process of removing electrons from atoms
- 4. high speed electron radiation
- 5. contact with radiation
- 6. device used to control nuclear reactions
- 8. series of nuclear reactions that sustain themselves
- 11. resistance of a nucleus to change
- 14. positively charged particle in nucleus
- 18. center of an atom containing protons and neutrons
- 19. amount of radiation absorbed
- 20. radioactive element used in nuclear fuel
- 22. alpha radiation made of helium nuclei