Across
- 5. an expert in or student of physics
- 6. particle (proton or neutron) constituting the atomic nucleus.
- 11. when two light atomic nuclei (for example hydrogen) unite into one and release energy.
- 13. also call radiation “electromagnetic waves”
- 14. elementary particle, electrically neutral, constituting the atomic nucleus
- 15. radiation, wave or invisible particle that certain unstable atoms, called radioactive, emit while transforming
- 16. the lightest simple body, made up of a proton and an electron
- 18. the lightest rare gas
- 20. invisible and odorless gas which constitutes approximately 1/5 of atmospheric air.
- 21. the star round which the earth orbits
Down
- 1. radiation emitted by radioactive substances
- 2. the smallest particle of a chemical element that can exist
- 3. when two light atomic nuclei (for example hydrogen) unite into one and release energy.
- 4. city of Ukraine where one of the biggest nuclear disasters occurred
- 7. the type of energy released during a fission or fusion, especially when used to generate electricity
- 8. which acts like a poison on something. Most products of this type have a pyctogram with a skull.
- 9. a very radioactive chemical element of the uranium family (symbol: Ra)
- 10. a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge
- 12. Curie, first woman to win a nobel prize, she did research on radioactivity
- 17. power plant, a thermal power station in which the heat source is a nuclear reactor.
- 19. an extremely light elementary particle, normally revolving around the atomic nucleus, and charged with negative electricity