P4 physics

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Across
  1. 3. what element nucleus is an alpha particle the same as
  2. 6. this is the charge on an alpha particle
  3. 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.
  4. 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.
  5. 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
  6. 11. this can stop alpha radiation
  7. 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
  8. 16. this is the metal that lines the boxes that store radioactive material
  9. 17. elements with the same number of protons but different numbers of neutrons are defined as this
  10. 19. the locations of electrons can be described as electron shells, energy levels or what other term
  11. 21. an mass of cells formed by the uncontrolled division of cells
  12. 22. true of false. Alpha decay only changes the atomic number of an element.
  13. 23. what term describes a charged atom
  14. 24. type of radiation is the most ionising
  15. 25. cancerous tumours that can spread, when cells break off and are carried in the blood
  16. 27. a beta particle is this
  17. 28. three key types of radioactive decay are alpha, beta and what other type
Down
  1. 1. which model of the atom is a ball of positive charge with electrons scattered throughout it
  2. 2. The time it takes for the number of radioactive nuclei of an isotope to halve.
  3. 4. changes in DNA caused by ionisation due to exposure to radiation
  4. 5. what word describes the result of bringing like charges close to each other
  5. 10. atoms are neutral because the numbers of electrons and protons are
  6. 12. Alpha radiation is comprised of protons and neutrons. Beta radiation is an electron. what is gamma radiation?
  7. 13. this is a commercial/everday use of alpha radiation
  8. 15. an alpha particle is made up of this and protons
  9. 18. these are located in the nucleus, have a relative mass of 1 and no charge
  10. 20. which type of radiation is used for aluminium sheet production. It helps regulate the thickness
  11. 26. which type of radiation is the most penetrating