Across
- 4. water in gas form
- 6. used uranium pellets
- 8. when a neutron and an atom collide to make more atoms, energy, and neutron(s)
- 9. the amount of time it takes for half of the radioactive substance to decay.
- 10. fuel for nuclear reactors
- 11. any atom that bears one or more positive or negative electrical charges
- 13. the subatomic particles revolving around the nucleus
- 14. gas produced by fossil fuels
- 17. unit of measuring energy
- 18. a vessel filled with a superheated transparent liquid
- 19. the smallest mass of material that will start a chain reaction in a reactor.
- 20. the self-sustaining fission reaction spread by neutrons which occurs in nuclear reactors.
- 23. when two or more atoms combine to make an atom and energy
- 24. it shows the path of a single charged particle can be made visible in cooled supersaturated air/alcohol vapor.
- 26. atom with same protons but different neutrons
- 28. substances with nuclear, chemical or biological properties that can help identify, observe or follow the behaviour of chemical or biological processes.
- 29. largest and weakest particle/ray
Down
- 1. energy produced from nuclear fission
- 2. not the smallest or biggest particle/ray
- 3. the changing of one element into another by radioactive decay, nuclear bombardment, or similar processes.
- 5. the force that holds subatomic particles together to form larger subatomic particles.
- 7. a device used for finding the amount of radiation in a substance
- 12. the act of emitting radiation spontaneously
- 15. the basic building block of matter
- 16. a subatomic particle with a positive electrical charge
- 20. positively charged ion
- 21. Stopped by lead and thick concrete
- 22. negatively charged ion
- 25. releases water vapor from nuclear reactors
- 27. a subatomic particle with a negative electrical charge