Across
- 2. mass of an alpha particle
- 5. a charge of minus one
- 8. stop beta particle
- 11. deflect alpha and beta but does not effect gamma
- 13. only nuclear radiation which is not a particle
- 14. an unstable atom emits radiation
- 17. most ionising radiation
- 19. needed with a GM tube
- 20. process of nuclear decay
- 21. beta particle
Down
- 1. which detects radiation
- 3. nulei which may decay
- 4. with different numbers of neutrons
- 6. time taken for half the radioactive nulei to decay
- 7. The charge on an alpha particle
- 9. cannot penetrate through
- 10. alpha particle
- 12. happens to the atomic number after beta decay
- 15. possible unit for half life
- 16. part of the atom where alpha,beta and gamma are emitted from
- 18. ability to cause atoms to become charged