1. Chapter 9 Electrons in Atoms and the Periodic Table
Clicker Questions
Chapter 9 Electrons in Atoms and the Periodic Table
Laurie LeBlanc Cuyamaca College

2. The distance between two adjacent crests or troughs in a wave is called the
A. frequency.
B. wavelength.
C. amplitude.
D. speed.
E. meter.
Answer: B

3. The distance between two adjacent crests or troughs in a wave is called the
A. frequency.
B. wavelength.
C. amplitude.
D. speed.
E. meter.
Answer: B

4. A packet of light energy or a particle of light is called a(n)
A. proton.
B. photon.
C. electron.
D. frequency.
E. gamma ray.
Answer: B

5. A packet of light energy or a particle of light is called a(n)
A. proton.
B. photon.
C. electron.
D. frequency.
E. gamma ray.
Answer: B

6. What term is usually used to describe all forms of electromagnetic radiation?
A. Heat
B. Frequency
C. Light
D. Blackbody radiation
E. Photon
Answer: C

7. What term is usually used to describe all forms of electromagnetic radiation?
A. Heat
B. Frequency
C. Light
D. Blackbody radiation
E. Photon
Answer: C

8. How are frequency and wavelength of light related?
A. The lower the frequency, the smaller the wavelength
B. The wavelength and frequency are equal.
C. The larger the wavelength, the higher the frequency
D. The higher the frequency, the smaller the wavelength
E. None of the above
Answer: D

9. How are frequency and wavelength of light related?
A. The lower the frequency, the smaller the wavelength
B. The wavelength and frequency are equal.
C. The larger the wavelength, the higher the frequency
D. The higher the frequency, the smaller the wavelength
E. None of the above
Answer: D

10. A blue shirt appears blue because it absorbs all colors of light except which one?
A. Yellow
B. Red
C. Green
D. Violet
E. Blue
Answer: E

11. A blue shirt appears blue because it absorbs all colors of light except which one?
A. Yellow
B. Red
C. Green
D. Violet
E. Blue
Answer: E

12. A. Gamma, X-ray, radio wave, IR, microwave
In which of the following are the types of electromagnetic radiation arranged in order of increasing frequency?
A. Gamma, X-ray, radio wave, IR, microwave
B. Radio wave, IR, visible, UV, X-ray
C. Radio wave, microwave, visible, UV, gamma
D. Gamma, UV, IR, microwave, radio wave
E. Gamma, UV, IR, visible, radio wave
Answer: B

13. A. Gamma, X-ray, radio wave, IR, microwave
In which of the following are the types of electromagnetic radiation arranged in order of increasing frequency?
A. Gamma, X-ray, radio wave, IR, microwave
B. Radio wave, IR, visible, UV, X-ray
C. Radio wave, microwave, visible, UV, gamma
D. Gamma, UV, IR, microwave, radio wave
E. Gamma, UV, IR, visible, radio wave
Answer: B

14. A. Gamma, X-ray, radio wave, IR, microwave
In which of the following are the types of electromagnetic radiation arranged in order of decreasing frequency?
A. Gamma, X-ray, radio wave, IR, microwave
B. Radio wave, IR, visible, UV, cosmic
C. Radio wave, microwave, visible, UV, gamma
D. X-ray, UV, IR, microwave, radio wave
E. Gamma, UV, visible, radio wave, IR
Answer: D

15. A. Gamma, X-ray, radio wave, IR, microwave
In which of the following are the types of electromagnetic radiation arranged in order of decreasing frequency?
A. Gamma, X-ray, radio wave, IR, microwave
B. Radio wave, IR, visible, UV, cosmic
C. Radio wave, microwave, visible, UV, gamma
D. X-ray, UV, IR, microwave, radio wave
E. Gamma, UV, visible, radio wave, IR
Answer: D

16. A. Gamma, X-ray, radio wave, IR, microwave
In which of the following are the types of electromagnetic radiation arranged in order of increasing energy per photon?
A. Gamma, X-ray, radio wave, IR, microwave
B. Radio wave, IR, visible, gamma, UV
C. Radio wave, microwave, visible, UV, gamma
D. X-ray, UV, IR, microwave, radio wave
E. Gamma, UV, IR, visible, radio wave
Answer: C

17. A. Gamma, X-ray, radio wave, IR, microwave
In which of the following are the types of electromagnetic radiation arranged in order of increasing energy per photon?
A. Gamma, X-ray, radio wave, IR, microwave
B. Radio wave, IR, visible, gamma, UV
C. Radio wave, microwave, visible, UV, gamma
D. X-ray, UV, IR, microwave, radio wave
E. Gamma, UV, IR, visible, radio wave
Answer: C

18. Which color of visible light has the least energy per photon?
A. Blue
B. Yellow
C. Red
D. Violet
E. Green
Answer: C

19. Which color of visible light has the least energy per photon?
A. Blue
B. Yellow
C. Red
D. Violet
E. Green
Answer: C

20. The Bohr model is based largely on the study of the emission spectrum of which of the following elements?
A. hydrogen
B. helium
C. oxygen
D. neon
E. all elements
Answer: A

21. The Bohr model is based largely on the study of the emission spectrum of which of the following elements?
A. hydrogen
B. helium
C. oxygen
D. neon
E. all elements
Answer: A

22. What is the shape of a p orbital?
A. Spherical
B. Doughnut
C. Pyramidal
D. Dumbbell
E. Square
Answer: D

23. What is the shape of a p orbital?
A. Spherical
B. Donut
C. Pyramidal
D. Dumbbell
E. Square
Answer: D

24. How many orbitals are associated with a given set of d orbitals with the same principal quantum number?
A. 1
B. 7
C. 3
D. 9
E. 5
Answer: E

25. How many orbitals are associated with a given set of d orbitals with the same principal quantum number?
A. 1
B. 7
C. 3
D. 9
E. 5
Answer: E

26. What is the maximum number of electrons allowed in each f orbital?
Answer: E

27. What is the maximum number of electrons allowed in each f orbital?
Answer: E

28. What is the maximum number of electrons in the n = 4 principal energy level?
D. 32
E. 64
Answer: D

29. What is the maximum number of electrons in the n = 4 principal energy level?
D. 32
E. 64
Answer: D

30. Which of the following electron configurations is NOT possible?
A. 1s22s22p3
B. [Ar]4s24d104p4
C. [Ne]3s2
D. [He]2s22p63s2
E. [Kr]5s24d105p2
Answer: B

31. Which of the following electron configurations is NOT possible?
A. 1s22s22p3
B. [Ar]4s24d104p4
C. [Ne]3s2
D. [He]2s22p63s2
E. [Kr]5s24d105p2
Answer: B

32. Which of the following elements has the following electron configuration 1s22s22p63s23p5?
A. O
B. Cl
C. F
D. Ar
E. S
Answer: B

33. Which of the following elements has the following electron configuration 1s22s22p63s23p5?
A. O
B. Cl
C. F
D. Ar
E. S
Answer: B

34. What is the electron configuration of the ground state of the P3– ion?
A. [Ar]4s23d104p1
B. [Ne]3s23p6
C. [He]2s22p63s2
D. [Ne]3s23p3
E. [Ne]3s2
Answer: B

35. What is the electron configuration of the ground state of the P3– ion?
A. [Ar]4s23d104p1
B. [Ne]3s23p6
C. [He]2s22p63s2
D. [Ne]3s23p3
E. [Ne]3s2
Answer: B

36. What is the electron configuration for sulfur?
A. [Ar]4s24p5
B. [Ne]3s23p4
C. 1s22s22p63s23p4
D. 1s22s22p63s23p5
E. Two of the above
Answer: E

37. What is the electron configuration for sulfur?
A. [Ar]4s24p5
B. [Ne]3s23p4
C. 1s22s22p63s23p4
D. 1s22s22p63s23p5
E. Two of the above
Answer: E

38. Which of the following ions has the same electron configuration as an argon atom?
A. Br–
B. K+
C. S3–
D. P3+
E. Ca+
Answer: B

39. Which of the following ions has the same electron configuration as an argon atom?
A. Br–
B. K+
C. S3–
D. P3+
E. Ca+
Answer: B

40. What is the electron configuration for the copper atom?
A. 1s22s22p63s23p64s23d7
B. [Ar]4s24d9
C. [Ar]4s13d10
D. 1s22s22p2
E. [Ar]4s23d9
Answer: C

41. What is the electron configuration for the copper atom?
A. 1s22s22p63s23p64s23d7
B. [Ar]4s24d9
C. [Ar]4s13d10
D. 1s22s22p2
E. [Ar]4s23d9
Answer: C

42. How many core electrons are in an arsenic (element 33) atom?
B. 28
C. 18
D. 5
E. 8
Answer: B

43. How many core electrons are in an arsenic (element 33) atom?
B. 28
C. 18
D. 5
E. 8
Answer: B

44. Which element forms compounds with formulas similar to compounds containing iodine?
A. Ar
B. S
C. Na
D. P
E. F
Answer: E

45. Which element forms compounds with formulas similar to compounds containing iodine?
A. Ar
B. S
C. Na
D. P
E. F
Answer: E

46. Arrange the following elements in order of increasing ionization energy:
Si, F, K, Mg, S
A. K, Mg, S, Si, F
B. Si, S, K, F, Mg
C. F, Si, S, Mg, K
D. K, Mg, Si, S, F
E. F, Mg, Si, K, S
Answer: D

47. Arrange the following elements in order of increasing ionization energy:
Si, F, K, Mg, S
A. K, Mg, S, Si, F
B. Si, S, K, F, Mg
C. F, Si, S, Mg, K
D. K, Mg, Si, S, F
E. F, Mg, Si, K, S
Answer: D

48. Arrange the following elements in order of increasing atomic radius:
Si, F, K, Mg, S
A. K, Mg, Si, S, F
B. Si, S, K, F, Mg
C. F, Si, S, Mg, K
D. K, Mg, Si, S, F
E. F, S, Si, Mg, K
Answer: E

49. Arrange the following elements in order of increasing atomic radius:
Si, F, K, Mg, S
A. K, Mg, Si, S, F
B. Si, S, K, F, Mg
C. F, Si, S, Mg, K
D. K, Mg, Si, S, F
E. F, S, Si, Mg, K
Answer: E

50. How many unpaired electrons are in an iron atom?
B. 20
C. 4
D. 1
E. 0
Answer: C

51. How many unpaired electrons are in an iron atom?
B. 20
C. 4
D. 1
E. 0
Answer: C

52. Which of the following atoms has the greatest metallic character?
A. Chlorine
B. Tellurium (Te)
C. Indium (In)
D. Carbon
E. Aluminum
Answer: C

53. Which of the following atoms has the greatest metallic character?
A. Chlorine
B. Tellurium (Te)
C. Indium (In)
D. Carbon
E. Aluminum
Answer: C

54. A. An orbital is the electron’s circular path around the nucleus.
Which of the following statements is true of the Bohr model of the atom?
A. An orbital is the electron’s circular path around the nucleus.
B. An orbit is a probability map showing the likeliest locations of electrons around a nucleus.
C. An orbit is the electron’s circular path around the nucleus.
D. An orbital is a probability map showing the likeliest locations of electrons around a nucleus.
Answer: C

55. A. An orbital is the electron’s circular path around the nucleus.
Which of the following statements is true of the Bohr model of the atom?
A. An orbital is the electron’s circular path around the nucleus.
B. An orbit is a probability map showing the likeliest locations of electrons around a nucleus.
C. An orbit is the electron’s circular path around the nucleus.
D. An orbital is a probability map showing the likeliest locations of electrons around a nucleus.
Answer: C

56. A. Orbitals in this model have a variety of shapes.
Which of the following statements is/are true of the Quantum Mechanical model of the atom?
A. Orbitals in this model have a variety of shapes.
B. An orbit is a probability map showing the likeliest locations of electrons around a nucleus.
C. An orbit is the electron’s circular path around the nucleus of a hydrogen atom.
D. An orbital is a probability map showing the likeliest locations of electrons around a nucleus.
E. Two of these statements are correct.
Answer: E

57. A. Orbitals in this model have a variety of shapes.
Which of the following statements is/are true of the Quantum Mechanical model of the atom?
A. Orbitals in this model have a variety of shapes.
B. An orbit is a probability map showing the likeliest locations of electrons around a nucleus.
C. An orbit is the electron’s circular path around the nucleus of a hydrogen atom.
D. An orbital is a probability map showing the likeliest locations of electrons around a nucleus.
E. Two of these statements are correct.
Answer: E

58. Light is emitted from an atom when
A. electrons move farther from the nucleus in energized atoms.
B. excited electrons return to lower energy paths around the nucleus.
C. the nucleus becomes excited (or energized).
D. photons move farther from the nucleus in energized atoms.
E. Two of these statements are correct.
Answer: B

59. Light is emitted from an atom when
A. electrons move farther from the nucleus in energized atoms.
B. excited electrons return to lower energy paths around the nucleus.
C. the nucleus becomes excited (or energized).
D. photons move farther from the nucleus in energized atoms.
E. Two of these statements are correct.
Answer: B

60. The electron configuration for calcium is 1s22s22p63s2
The electron configuration for calcium is 1s22s22p63s2. Which electrons are lost upon ionization?
A. The 3s electrons
B. The 2s electrons
C. Two of the 2p electrons
D. The 1s electrons
E. None of the above
Answer: A

61. The electron configuration for calcium is 1s22s22p63s2
The electron configuration for calcium is 1s22s22p63s2. Which electrons are lost upon ionization?
A. The 3s electrons
B. The 2s electrons
C. Two of the 2p electrons
D. The 1s electrons
E. None of the above
Answer: A

62. The electron configuration for bromine is [Ar]4s23d104p5
The electron configuration for bromine is [Ar]4s23d104p5. List the number of core electrons and valence electrons, respectively.
A. 18 and 17
B. 20 and 15
C. 10 and 25
D. 28 and 7
E. 30 and 5
Answer: D

63. The electron configuration for bromine is [Ar]4s23d104p5
The electron configuration for bromine is [Ar]4s23d104p5. List the number of core electrons and valence electrons, respectively.
A. 18 and 17
B. 20 and 15
C. 10 and 25
D. 28 and 7
E. 30 and 5
Answer: D