1. Ch 3 Exam Review

2. Objective
iWBAT
Participate in a Ch 3 exam review activity.

3. Drill
Switch to the half life drill ppt

4. This scientist developed the Atomic Theory of Matter
Ans: John Dalton

5. Ions An atom that loses an electron is called a(n) ___________. Ans:
cation

6. Who Developed this model of the atom?

7. Who Developed this model of the atom?
Ans:
J.J. Thomson

8. This type of radiation can be stopped by paper or clothing
Alpha

9. Which Scientist…
Used the Oil Drop experiment to determine the mass of an electron
Robert Millikan

10. What are the three characteristics that allow you to distinguish between the three types of radiation?
Charge, mass, and penetrating power

11. Which Scientist… Called the negatively charged particles electrons
JJ Thomson

12. Rutherford used this experiment to determine that an atom contains a nucleus
Gold Foil Experiment
(or Alpha Scattering experiment)

13. A sodium atom has a charge of what?
zero

14. Beta particles consist of a stream of high speed:
electrons

15. Which scientist used this experiment?

16. Which scientist used this experiment?
Ans:
Rutherford

17. Who developed the four postulates of atomic theory, including atoms are the smallest, indivisible part of an element?
Ans:
John Dalton

18. How many protons does the ion Na+111

19. If an element has 9 protons and 10 electrons does it have a positive or negative charge?

20. What are the three types of radioactive particles/rays?
Alpha, beta, and gamma

21. Who Developed this model of the atom?

22. Who Developed this model of the atom?
Ans:
Erwin Schrodinger

23. Who developed the Plum Pudding model?
Ans:
J.J. Thomson

24. Which Scientist…
Named the core of the atom “the nucleus”
Rutherford

25. How many electrons does Na+1 have?10

26. When writing the chemical symbol for an ion, where is the charge written in relation to the chemical symbol?
In the upper right hand corner

27. How many protons does Ca+2 have?20

28. Ions An atom that gains electrons is called a(n) ___________. Ans:
anion

29. What subatomic particle has a charge of 0?
A neutron

30. Which subatomic particle has a charge of +1
A proton

31. This type of radiation is not a particle
gamma

32. Who used the oil-drop experiment and what did it prove?
Ans:
Robert Millikan-the charge to mass ratio of the electron

33. What did the Gold-foil experiment show?
Ans:
That the nucleus of the atom is very small and positively charged.

34. Which scientist used this experiment?

35. Which scientist used this experiment?
Ans:
Millikan

36. What did the cathode ray tube experiment prove?
Ans:
Electrons are negatively charged

37. Who Developed this model of the atom?

38. Who Developed this model of the atom?
Ans:
Niels Bohr

39. Who performed the gold-foil alpha scattering experiment?
Ans:
Ernest Rutherford

40. Who used cathode ray tubes to study electrons?
Ans:
J.J. Thomson

41. You determine the charge of an ion by subtracting the number of electrons from:
The number of protons

42. A neutron changing into a proton and an electron describes which type of radioactive decay?
beta

43. If iron (Fe) undergoes alpha decay, what element is formed?
Cr (chromium)

44. If nickel (Ni) undergoes beta decay, which element is formed?
Cu (copper)

45. What is the symbol for an alpha particle?
See next slide for answer

46. What is the symbol for an alpha particle?

47. How many protons does F-1?9

48. This type of radioactive particle has a mass of 4 AMU, consisting of 2 protons and 2 neutrons
Alpha particle

49. Isotopes contain different numbers of: ______
Neutrons

50. All elements with atomic numbers greater than what are radioactive?83

51. What is the symbol for a beta particle?
See next slide for answer

52. What is the symbol for a beta particle?

53. What does the 37 stand for in chlorine - 37?
The mass number

54. Given the chemical symbol Kr, how many neutrons are present?
= 48

55. What is the approximate mass of an electron in AMU?
zero

56. How many neutrons does Al (aluminum) have?
27-13 = 14

57. Which Scientist Developed the Quantum Mechanical model of the atom?
Ans: Schrodinger

58. As atomic number increases, the number of neutrons and protons :
As atomic number increases, the number of neutrons and protons : (increases or decreases)
increases

59. Which subatomic particle is responsible for the increased mass of an isotope?
neutron

60. Which Scientist
Experimented using Cathode Ray Tubes?
Ans: Thomson

61. This type of radiation can only be stopped by concrete or lead
gamma

62. What is the specialty term that we give to the atomic mass when we round it?
The mass number

63. Which Scientist
Is the Greek philosopher who believed that there are small indivisible bodies from which everything else is composed.
Ans: Democritis

64. Nuclei are unstable if they contain too many or too few:
Neutrons

65. Elements with atomic numbers between 1 and 20 have almost equal numbers of protons and what?
neutrons

66. Radioactive elements are found in this area of the periodic table?
The bottom section

67. This is the spontaneous emission of radiation from an atom
Radioactivity

68. Name the 3 subatomic particles of an atom.
Proton, neutron, electron

69. What does the AMU stand for?
Atomic Mass Unit

70. Measured the charge of an electron using the oil drop experiment.
Millikan

71. If an element has 19 protons and 18 electrons, what is its charge?+1

72. Which subatomic particle has no charge?
Neutron

73. Final Jeopardy
This scientist wrote the 4 postulates of the atomic theory of matter
Dalton
Which isotope is the entire periodic table based on?
Carbon-12