Test Bank for Chemistry A Molecular Approach 1st Edition by Tro Chapter 7 The Quantum-Mechanical Model of the Atom Multiple Choice Questions 1 The vertical height of a wave is called Di
Trang 1Test Bank for Chemistry A Molecular Approach 1st Edition by Tro
Chapter 7 The Quantum-Mechanical Model of the Atom
Multiple Choice Questions
1) The vertical height of a wave is called
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
2) The number of cycles that pass through a stationary point is
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
3) Place the following types of electromagnetic radiation in order of
increasing wavelength
ultraviolet light gamma rays radio waves
A) gamma rays < radio waves < ultraviolet light
B) radio waves < ultraviolet light < gamma rays
C) radio waves < gamma rays < ultraviolet light
D) ultraviolet light < gamma rays < radio waves
E) gamma rays < ultraviolet light < radio waves
Trang 2Answer: E
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
4) Place the following types of electromagnetic radiation in order of
increasing frequency
visible light microwaves X-rays
A) microwaves < visible light < X-rays
B) X-rays < visible light < microwaves
C) microwaves < X-rays < visible light
D) X-rays < microwaves < visible light
E) visible light < X-rays < microwaves
Answer: A
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
5) Place the following types of electromagnetic radiation in order of
decreasing energy
ultraviolet light radio waves microwaves
A) radio waves > microwaves > ultraviolet light
B) ultraviolet light > microwaves > radio waves
C) radio waves > ultraviolet light > microwaves
D) ultraviolet light > radio waves > microwaves
E) microwaves > radio waves > ultraviolet
light Answer: B
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
6) On the electromagnetic spectrum, visible light is immediately between two other wavelengths Name them
A) infrared and X-ray
B) radio and microwave
C) gamma ray and ultraviolet
D) microwave and X-ray
E) infrared and ultraviolet
Answer: E
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
7) Identify the colour that has a wavelength of 700 nm
A) blue
Trang 3B) green
C) red
D) yellow
Answer: C
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
8) Identify the colour that has a wavelength of 460
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
9) Which of the following visible colours of light has the highest
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
10) Which of the following visible colours of light has the longest wavelength? A) blue
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
11) Which of the following colours of electromagnetic radiation has the shortest wavelength?
Trang 4Answer: B
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
12) Which of the following types of electromagnetic radiation has the
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
13) Calculate the wavelength (in nm) of a the red light emitted by a neon sign with
Diff: 2 Type: MC Var: 1 Page Ref: 7.2
14) A sunburn is caused by overexposure to radiation
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
15) Food can be cooked by
Trang 516) When waves of equal amplitude from two sources are out of phase when they interact, it is called
Diff: 1 Type: MC Var: 1 Page Ref: 7.2
17) Calculate the wavelength (in nm) of the blue light emitted by a mercury lamp with a frequency of
Diff: 2 Type: MC Var: 1 Page Ref: 7.2
18) Which of the following occurs as the energy of a photon increases? A) The frequency decreases
B) The speed increases
C) The wavelength increases
D) The wavelength gets shorter
E) None of the above occurs as the energy of a photon increases
Answer: D
Diff: 2 Type: MC Var: 1 Page Ref: 7.2
19) Which of the following occurs as the wavelength of a photon
increases? A) The frequency decreases
B) The energy increases
C) The speed decreases
D) Planck’s constant decreases
E) None of the above occurs as the wavelength of a photon
increases Answer: A
Diff: 2 Type: MC Var: 1 Page Ref: 7.2
Trang 620) Calculate the frequency of the red light emitted by a neon sign with a
Diff: 2 Type: MC Var: 1 Page Ref: 7.2
21) Calculate the energy of the green light emitted, per photon, by a mercury lamp with a frequency of 5.49 × 1014 Hz
Diff: 2 Type: MC Var: 1 Page Ref: 7.2
22) Calculate the energy of the orange light emitted, per photon, by a neon sign with a frequency of
Diff: 2 Type: MC Var: 1 Page Ref: 7.2
23) Calculate the frequency of the green light emitted by a hydrogen atom with
Trang 724) Calculate the energy of the red light emitted by a neon atom with a
Diff: 3 Type: MC Var: 1 Page Ref: 7.2
25) Calculate the energy of the violet light emitted by a hydrogen atom with
Diff: 3 Type: MC Var: 1 Page Ref: 7.2
26) How many photons are contained in a burst of yellow light (589 nm) from
a sodium lamp that contains 609 kJ of energy?
Diff: 3 Type: MC Var: 1 Page Ref: 7.2
27) How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy?
Trang 828) How much energy (in kJ) do 3.0 moles of photons, all with a wavelength of
Diff: 3 Type: MC Var: 1 Page Ref: 7.2
29) Determine the shortest frequency of light required to remove an electron from
a sample of Ti metal if the binding energy of titanium is 3.14 × 103 kJ mol-1 A) 7.87 × 1015 Hz
Diff: 3 Type: MC Var: 1 Page Ref: 7.2
30) What total energy (in kJ) is contained in 1.0 mol of photons, all with
Diff: 3 Type: MC Var: 1 Page Ref: 7.2
31) Determine the longest wavelength of light required to remove an electron from a sample of potassium metal if the binding energy for an electron in K is 1.76 × 103 kJ mol-1
Trang 932) Identify the colour of a flame test for
Diff: 1 Type: MC Var: 1 Page Ref: 7.3
33) Identify the colour of a flame test for
Diff: 1 Type: MC Var: 1 Page Ref: 7.3
34) It is possible to determine the ionization energy for hydrogen using the Bohr equation Calculate the ionization energy for an atom of hydrogen, making the assumption that ionization is the transition from
Diff: 2 Type: MC Var: 1 Page Ref: 7.3
35) Which of the following transitions (in a hydrogen atom) represent emission
of the longest wavelength photon?
Diff: 1 Type: MC Var: 1 Page Ref: 7.3
36) Which of the following transitions (in a hydrogen atom) represent
absorption of the smallest frequency photon?
Trang 10Diff: 1 Type: MC Var: 1 Page Ref: 7.3
37) Choose the transition (in a hydrogen atom) below which represents the absorption of the shortest wavelength photon
Diff: 1 Type: MC Var: 1 Page Ref: 7.3
38) Which of the following transitions represent the emission of a photon with the largest energy?
Diff: 1 Type: MC Var: 1 Page Ref: 7.3
39) Calculate the wavelength of light emitted from a hydrogen atom when
an electron undergoes an n = 8 to n = 4 transmission
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
40) Calculate the wavelength of light absorbed by a hydrogen atom when
an electron undergoes an n = 2 to n = 4 transmission
A) 433.9 nm
B) 410.0 nm
Trang 11C) 1093 nm
D) 486.0 nm
E) 3295 nm
Answer: D
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
41) Calculate the energy associated with an n = 2 to n = 5 transmission in
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
42) An electron initially in the n = 2 orbital of a hydrogen atom absorbs a photon with a wavelength of 656 nm Calculate the final orbital, nf
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
43) An electron initially in the n = 5 orbital of a hydrogen atom emits a
photon with a wavelength of 1284 nm Calculate the final orbital, nf
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
44) Calculate the final orbital, nf, of an electron in a hydrogen atom that starts
at orbital n = 4 and undergoes an energy transition of -1.06 × 10-19 J
A) 3
B) 4
Trang 12C) 2
D) 5
E) 1
Answer: A
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
45) It is possible to determine the ionization energy for hydrogen using the Bohr equation Calculate the ionization energy (in kJ) for a mole of hydrogen atoms, making the assumption that ionization is the transition from n = 1 to n = ∞
Diff: 2 Type: MC Var: 1 Page Ref: 7.3
46) Calculate the wavelength of light associated with the transition from n = 1 to
n = 3 in the hydrogen atom
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
47) Calculate the frequency of light associated with the transition from n = 2 to n
= 3 in the hydrogen atom
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
48) How much energy (in kJ) is required to ionize 2.78 moles of hydrogen
atoms? A) 2.74 × 103 kJ
B) 4.72 × 103 kJ
C) 1.66 × 103 kJ
D) 3.65 × 103 kJ
Trang 13E) 5.89 × 103
kJ Answer: D
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
49) Determine the end (final) value of n in a hydrogen atom transition if the electron starts in n = 4 and the atom emits a photon of light with a wavelength
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
50) Determine the end (final) value of n in a hydrogen atom transition if the electron starts in n = 2 and the atom absorbs a photon of light with a frequency
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
51) Determine the end (final) value of n in a hydrogen atom transition if the electron starts in n = 1 and the atom absorbs a photon of light with an energy
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
52) An electron ends in orbital n = 4 after a hydrogen atom absorbs a photon with
a wavelength of 486 nm Calculate the initial orbital, ni
A) 1
B) 5
C) 2
Trang 14D) 3
E) 6
Answer: C
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
53) An electron ends in orbital n = 3 after a hydrogen atom emits a photon with
a wavelength of 1093 nm Calculate the initial orbital, ni
A) 1 B) 5
C) 2 D) 3
E) 6
Answer: E
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
54) An electron ends in orbital n = 4 after a hydrogen atom emits a photon with
a wavelength of 2165 nm Calculate the initial orbital, ni
Diff: 3 Type: MC Var: 1 Page Ref: 7.3
55) Which of the following statements is TRUE?
A) The emission spectrum of a particular element is always the same and can
be used to identify the element
B) Part of the Bohr model proposed that electrons in the hydrogen atom are
located in “stationary states” or particular orbits around the nucleus
C) The uncertainty principle states that we can never know both the exact
location and speed of an electron
D) An orbital is the volume in which we are most likely to find an electron
E) All of the above are true
Answer: E
Diff: 1 Type: MC Var: 1 Page Ref: 7.4
56) Calculate the wavelength of an electron (m = 9.11 × 10-28 g) moving at 3.66 ×
106 m s-1
A) 1.99 × 10-10 m
Trang 15Diff: 2 Type: MC Var: 1 Page Ref: 7.4
57) Calculate the wavelength of a baseball (m = 155 g) moving at 32.5 m s-1 A) 7.60 × 10-36 m
Diff: 2 Type: MC Var: 1 Page Ref: 7.4
58) Determine the velocity of a marble (m = 8.66 g) with a wavelength of 3.46
Diff: 2 Type: MC Var: 1 Page Ref: 7.4
59) Determine the velocity of a medicine ball (m = 10.0 kg) with a wavelength
Diff: 2 Type: MC Var: 1 Page Ref: 7.4
60) Determine the mass of a ball with a wavelength of 3.45 × 10-34 m and a velocity of 6.55 m s-1
A) 0.293
g B) 12.6
g C) 293 g
D) 346 g
Trang 16E) 3.41 g
Answer: C
Diff: 2 Type: MC Var: 1 Page Ref: 7.4
61) Determine the mass of a ball with a velocity of 35.1 m s-1 and a wavelength
Diff: 2 Type: MC Var: 1 Page Ref: 7.4
62) Calculate the de Broglie wavelength of a pen with a mass of 14.28 g
Diff: 2 Type: MC Var: 1 Page Ref: 7.4
63) Calculate the de Broglie wavelength of an egg with a mass of 60 g travelling
Diff: 2 Type: MC Var: 1 Page Ref: 7.4
64) Calculate the mass of a pickup truck travelling at 100.0 km h-1 and a de Broglie wavelength of 1.24 × 10-38 m
Trang 17Answer: A
Diff: 2 Type: MC Var: 1 Page Ref: 7.4
65) Calculate the velocity of a pickup truck with a de Broglie wavelength of 1.27
Diff: 2 Type: MC Var: 1 Page Ref: 7.4
66) For n = 3, what are the possible sublevels?
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
67) What are the possible orbitals for n =
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
68) Calculate the energy of an electron in the orbital n = 5 of a hydrogen
Diff: 2 Type: MC Var: 1 Page Ref: 7.5
69) Calculate the energy of an electron in the orbital n = 6 of a hydrogen
atom A) 3.19 × 10-20 J
B) 4.18 × 10-20 J
C) -6.06 × 10-20 J
Trang 18D) -7.80 × 10-20 J
E) -8.62 × 10-20
J Answer: C
Diff: 2 Type: MC Var: 1 Page Ref: 7.5
70) Calculate the orbital for the hydrogen atom that contains an electron with
Diff: 2 Type: MC Var: 1 Page Ref: 7.5
71) Calculate the orbital for the hydrogen atom that contains an electron with
Diff: 2 Type: MC Var: 1 Page Ref: 7.5
72) What value of l is represented by a d orbital?
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
73) Each of the following sets of quantum numbers is supposed to specify
an orbital Which of the following sets of quantum numbers contains an error? A) n = 2, l = 1 , ml = -1
Trang 19Diff: 1 Type: MC Var: 1 Page Ref: 7.5
74) Each of the following sets of quantum numbers is supposed to specify an orbital Choose the one set of quantum numbers that does not contain an error A) n = 2, l = 2, ml = -1
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
75) Each of the following sets of quantum numbers is supposed to specify an orbital Choose the one set of quantum numbers that does not contain an error A) n = 4, l = 4, ml = 0
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
76) How many orbitals are contained in the third principal level (n = 3) of a given atom?
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
77) How many sublevels are contained in the second shell (n = 2) of a given atom? A) 1
Trang 2078) Which of the following statements is TRUE?
A) We can sometimes know the exact location and speed of an electron at the same time
B) All orbitals in a given atom are roughly the same size
C) Since electrons have mass, we must always consider them to have particle properties and never wavelike properties
D) Atoms are roughly spherical because when all of the different shaped orbitals are overlapped, they take on a spherical shape
E) All of the above are true
Answer: D
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
79) Which of the following quantum numbers describes the shape of an
orbital? A) principal quantum number
B) magnetic quantum number
C) spin quantum number
D) Schrödinger quantum number
E) angular momentum quantum number
Answer: E
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
80) Which of the following quantum numbers describes the orientation of an orbital?
A) magnetic quantum number
B) principal quantum number
C) angular momentum quantum
number D) spin quantum number
E) Schrödinger quantum number
Answer: A
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
81) Which of the following quantum numbers describes the size and energy of
an orbital?
A) magnetic quantum number
B) principal quantum number
C) angular momentum quantum
number D) spin quantum number
E) Schrödinger quantum number
Answer: B
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
Trang 2182) How many different values of ml are possible in the 4f
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
83) How many different values of l are possible in the third principal level? A) 1
B) 2 C) 3
D) 0 E) 4
Answer:
C
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
84) How many different values of ml are possible in the 3d sublevel? A) 2
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
85) How many different values of ml are possible in the 2p sublevel? A) 2
Diff: 1 Type: MC Var: 1 Page Ref: 7.5
86) Give all possible values of l for a 3 sublevel