2. 1 1111 111111 22 222 2 2 3333333 4444444 Greek Philosop hers Dalton’ s Atomic Theory How atoms differ Radioac tivity Types of radiatio n The atom Subatomic particles

3. A 1 Said that matter is made of atoms which move through empty space

4. A 2 Stated that empty space cannot exist and that matter is made up of earth fire, and water

5. A 3 Marked the beginning of the modern atomic theory

6. A 4 Dalton’s idea’s were most like who??

7. B 1 Atoms are composed of extremely small particles called?

8. B 2 Atoms of a given element had identical what?

9. B 3 Atoms do this when they combine to make compounds

10. B 4 In a chemical reaction, atoms do this.

11. C 1 The smallest part particle of an element that retains the properties of the element.

12. C 2 Discovered by JJ Thomson, this atomic particle was found using a cathode ray tube

13. C 3 The model Thomson composed that states that the atom is a uniform, positively charged sphere containing electrons.

14. C 4 The scientist and name of the experiment who used the Plum Pudding model to determine properties of the nucleus, including charge, relative size, and density

15. D 1 Carries a positive charge and is located in the nucleus of the atom

16. D 2 Discovered by James Chadwick, contains a neutral charge, is located in the nucleus, is about the same mass as a proton

17. D 3 Carries a negative charge, located surrounding the nucleus, and has a mass much smaller than a proton and neutron

18. D 4 Most of the atoms’ mass

19. E 1 The number of protons in an atom is also the elements identity

20. E 2 Atoms with the same number of protons but different number of neutrons

21. E 3 The atomic number plus the number of neutrons

22. E 4 Defined as one twelfth the mass of a carbon-12 atom. (An easier way to express the mass of an atom

23. F 1 The rays and particles emitted by radioactive material

24. F 2 A reaction that involves a change in an atom’s nucleus.

25. F 3 Unstable nuclei lose energy by emitting radiation in this spontaneous process.

26. F 4 Substances that spontaneously emit radiation is called this process

27. G 1 Contains two protons and two neutrons and is equivalent to a Helium-4 nucleus

28. G 2 Consists of a fast moving electron

29. G 3 High energy radiation that possess no mass usually accompanies alpha and beta radiation

30. G 4 The quantities that are conserved when balancing a nuclear reaction

31. A 1 Democritus

32. A 2 Aristotle

33. A 3 Dalton

34. A 4 Democritus

35. B 1 ATOMS

36. B 2 Size, Shape, and Mass

37. B 3 Combine in simple whole number ratios

38. B 4 Separate, combine and rearrange

39. C 1 ATOM

40. C 2 Electron

41. C 3 Plum Pudding model

42. C 4 Rutherford – Gold Foil Experiment

43. D 1 PROTON

44. D 2 Neutron

45. D 3 Electron

46. D 4 Nucleus

47. E 1 Atomic Number

48. E 2 Isotope

49. E 3 Mass Number

50. E 4 amu

51. F 1 Radiation

52. F 2 Nuclear reaction

53. F 3 Radioactive decay

54. F 4 Radioactivity

55. G 1 Alpha particle

56. G 2 Beta particle

57. G 3 Gamma ray

58. G 4 Mass number and atomic number