Across
- 3. Unit for activity
- 6. About 5mm of this is needed to stop betas.
- 11. When a person or object receives a dose of radiation
- 12. Fusing of lighter nuclei to make a heavier nucleus
- 13. About 5cm of this is enough to stop alphas.
- 15. If radioactive particles end up on a surface or person that they shouldn't
- 17. A thin sheet of this is enough to stop alphas.
- 18. About 5cm of this needed to stop gamma radiation
- 19. Number for the total number of protons & neutrons
Down
- 1. The rate that radiation is emitted from a nucleus
- 2. Pudding model of atom that came before Rutherford's
- 4. Particles with no charge needed to start fission
- 5. Counter used to detect ionising radiation
- 6. Number for the number of protons
- 7. Fast moving electron emitted from a nucleus
- 8. Process where electrons are knocked out of atoms
- 9. An alpha particle is the same as this nucleus
- 10. Splitting a massive nucleus into 2 lighter nuclei
- 14. Electromagnetic radiation emitted by a nucleus
- 16. Particle made from 2 protons & 2 neutrons