Across
- 1. Units of activity.
- 3. During fusion the total mass .....
- 5. These can be used to slow down fission in a nuclear reactor.
- 6. The joining of two light nuclei.
- 11. A ball of positive charge with electrons scattered within.
- 16. Negative part of an atom.
- 17. Nuclear energy is preferred to fossil fuels, as they do not produce ...
- 20. Both fission and fusion release ....
- 22. Decay means to emit ...
- 24. .... are used to explore internal organs.
- 25. Fission produces lighter nuclei, energy and .... neutrons
- 27. The radiation that has the highest penetration ability.
- 29. Radiation is emitted from the ...
- 30. Radiation that is a high speed electron.
Down
- 2. Gamma is an ..... wave.
- 4. If something is ionised, it becomes ...
- 7. The time it takes for half of the radioactive nuclei to decay.
- 8. ... radiation is two protons and two neutrons.
- 9. The splitting of large unstable nuclei.
- 10. A natural source of background radiation.
- 12. During Beta decay, a .... turns into 2 other subatomic particles.
- 13. During fusion some mass is converted into .....
- 14. When someone sunbathes, they are exposed to radiation. This is an example of...
- 15. If someone rubs a radioactive source in their hair, this is an example of...
- 18. Ionising cells can cause ....
- 19. In a reactor, energy heats water to produce ... which turns a turbine.
- 21. This makes up 50% of background radiation.
- 23. Elements with the same number of protons but different neutrons.
- 26. Rutherford fired alpha particles at ... foil.
- 28. A manmade source of background radiation.