Across
- 4. stops alpha particles
- 6. of gamma radiation.
- 9. of alpha particles
- 10. of 2 protons and 2 neutrons.
- 11. number increases by this when it loses a beta particle.
- 12. type of electromagnetic radiation.
- 13. number increases by this when it loses a beta particle.
- 15. radiation using uranium salts on a photographic plate.
- 17. stops gamma radiation.
- 19. amount of radioactivity found in the air naturally.
- 21. a change in nucleus and a new element is formed.
- 22. time taken for half of the nuclei in any given sample to decay.
- 23. of beta radiation
- 25. of gamma radiation
- 26. of alpha radiation.
- 27. discovered during the re-crystallizations of uranium ore.
Down
- 1. number decreases by this when it loses an alpha particle.
- 2. when a neutron breaks down into a proton and an electron.
- 3. of beta particles
- 5. spontaneous breaking up of an unstable nuclei.
- 7. the Nobel Prize for Chemistry and Physics.
- 8. is detected using this type of counter.
- 14. new element is formed but chemical bonds are.
- 16. either alpha or beta particles are released a new element is formed.
- 18. name for uranium ore.
- 20. stops beta particles.
- 24. number decreases by this when it loses an alpha particle.