Across
- 4. The type of radiation with low ionisation but high penetrating power
- 8. The element that other atomic masses are compared to
- 9. The process of joining two smaller nuclei together
- 10. When objects are exposed to beams of radiation
- 13. When objects have radioactive material introduced into it
- 15. Dalton's model of the atom was spherical and ________
Down
- 1. A ________-Muller tube can be used to detect radiation
- 2. The negatively charged particle of the atom
- 3. The time taken for half of a nucleus to decay
- 5. The splitting of large nuclei into smaller nuclei
- 6. The type of radiation with high ionisation but low penetrating power
- 7. This scientist discovered that electrons orbited the nucleus
- 11. An atom that has a different amount of neutrons to atoms of the same element
- 12. A common fuel in nuclear reactors
- 14. If an atom loses or gains an electron, it becomes an ___