Across
- 3. what element nucleus is an alpha particle the same as
- 6. this is the charge on an alpha particle
- 7. beta particles have a medium penetration power and a range of about 1m. it is also more ionising than gamma but less than alpha. it can be stopped by using a thin sheet of which metal.
- 8. Rutherford revised the plum pudding model and proposed a nucleus. He saw three key things in his gold foil experiment. Most particles passed through, very few rebounded, and what happened to the others.
- 9. scientific findings are shared in scientific papers, so they can be checked by other scientists for their validity. what term describes this sharing of information
- 11. this can stop alpha radiation
- 14. in Rutherford's experiments, as most alpha particles passed through the gold foil without really changing direction he suggested most of the atom was what
- 16. this is the metal that lines the boxes that store radioactive material
- 17. elements with the same number of protons but different numbers of neutrons are defined as this
- 19. the locations of electrons can be described as electron shells, energy levels or what other term
- 21. an mass of cells formed by the uncontrolled division of cells
- 22. true of false. Alpha decay only changes the atomic number of an element.
- 23. what term describes a charged atom
- 24. type of radiation is the most ionising
- 25. cancerous tumours that can spread, when cells break off and are carried in the blood
- 27. a beta particle is this
- 28. three key types of radioactive decay are alpha, beta and what other type
Down
- 1. which model of the atom is a ball of positive charge with electrons scattered throughout it
- 2. The time it takes for the number of radioactive nuclei of an isotope to halve.
- 4. changes in DNA caused by ionisation due to exposure to radiation
- 5. what word describes the result of bringing like charges close to each other
- 10. atoms are neutral because the numbers of electrons and protons are
- 12. Alpha radiation is comprised of protons and neutrons. Beta radiation is an electron. what is gamma radiation?
- 13. this is a commercial/everday use of alpha radiation
- 15. an alpha particle is made up of this and protons
- 18. these are located in the nucleus, have a relative mass of 1 and no charge
- 20. which type of radiation is used for aluminium sheet production. It helps regulate the thickness
- 26. which type of radiation is the most penetrating