Across
- 2. When two atoms have the same number of protons but different numbers of neutrons
- 6. Used to steralise medical equipment in hospitals
- 10. Time taken for activity of sample to halve
- 11. Charged subatomic particle inside a nucleus
- 12. A nucleon is either or proton or a ...
- 13. The process used to measure the age of old things containing wood
- 14. When fired at U-235 caused fission
- 15. Material used to make nuclear weapons
- 16. The number of nucleons inside a nucleus
- 18. The nucleus an alpha particle is made from
Down
- 1. The number of protons in an atom
- 3. Rutherford found the nucleus at the centre of the atom was positive and ...
- 4. Process inside nuclear bombs which makes them use up fuel quickly
- 5. Material rutherford fired alpha particles at
- 7. Most ionising type of radiation
- 8. Passes through paper
- 9. Charge of an alpha particle
- 17. Everyday use of radiation used in most buildings
- 19. What beta particles are made of