Across
- 1. brain of the atom
- 6. used to determine the age of fossils
- 9. a dose of radiation that is measured in units
- 11. the neutrally charged element of an atom
- 12. when a nucleus ejects a cluster of two protons & two neutrons
- 13. the use of radiation to kill bacteria
- 15. any rays or particles emitted by atomic nuclei
- 17. atoms that have the same number of protons but a different number of neutrons
- 18. when the DNA inside the cell is damaged causing the cell to die
- 19. large, heavy & slow particles
- 21. caused by a short exposure to a large amount of radiation
- 23. the time it takes for half the nuclei to decay
Down
- 2. the constant moving of protons & neutrons
- 3. when the protons and neutrons rearrange inside the nucleus
- 4. the change to another element
- 5. small & fast particles
- 7. the other name for alpha, beta & gamma rays
- 8. a style of treatment using radiation
- 10. most of the atoms around you that will never go under nuclear decay
- 14. the emission of electromagnetic radiation
- 16. the positively charged element of an atom
- 20. can travel through skin, bone & aluminum, making it dangerous to humans
- 21. unstable atoms
- 22. when the nucleus ejects electron like negative particles