Question 1

Which scientist demonstrated that photons transferred momentum during collisions with matter?

Accepted Answer

A)  Bohr
B)  de Broglie
C)  Planck
D)  Compton
E)  BilliardF) None of the above
G) A) and E)

Question 2

In the quantum mechanical treatment of the hydrogen atom, which one of the following combinations of quantum numbers is not allowed?

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  EF) A) and C)
G) D) and E)

Question 3

The Rydberg equation, giving the wavelengths of lines in the spectrum of the hydrogen atom, was obtained by assuming that energy is quantized.

Accepted Answer

A) True 
 B)False

Question 4

Continuous spectra are characteristic of heated solids.

Accepted Answer

A) True 
 B)False

Question 5

The orientation in space of an atomic orbital is associated with

Accepted Answer

A)  the principal quantum number ( n) .
B)  the angular momentum quantum number ( l) .
C)  the magnetic quantum number ( ml) .
D)  the spin quantum number ( ms) .
E)  None of these choices are correct.F) B) and D)
G) A) and E)

Question 6

Continuous spectra are characteristic of molecules in the gas phase.

Accepted Answer

A) True 
 B)False

Question 7

Who proposed a model that successfully explained the photoelectric effect?

Accepted Answer

A)  Planck
B)  Einstein
C)  Compton
D)  Rydberg
E)  BohrF) C) and D)
G) B) and D)

Question 8

Green light has a wavelength of 5200 Å. Calculate the energy of one photon of green light.

Accepted Answer

A)  3.4 × 10 −40 J
B)  3.4 × 10 −30 J
C)  3.8 × 10 −29 J
D)  3.4 × 10 −27 J
E)  3.8 × 10 −19 JF) B) and C)
G) B) and E)

Question 9

Consider the following adjectives used to describe types of spectrum: continuous, line, atomic, emission and absorption.How many of them are appropriate to describe the spectrum of radiation given off by a black body?

Accepted Answer

A)  None
B)  One
C)  Two
D)  Three
E)  FourF) B) and E)
G) B) and C)

Question 10

Excited hydrogen atoms radiate energy in the

Accepted Answer

A)  infrared region only.
B)  visible region only.
C)  ultraviolet region only.
D)  visible and ultraviolet regions only.
E)  infrared, visible, and ultraviolet regions.F) B) and D)
G) A) and E)

Question 11

Atomic orbitals developed using quantum mechanics

Accepted Answer

A)  describe regions of space in which one is most likely to find an electron.
B)  describe exact paths for electron motion.
C)  give a description of the atomic structure which is essentially the same as the Bohr model.
D)  allow scientists to calculate an exact volume for the hydrogen atom.
E)  are in conflict with the Heisenberg Uncertainty Principle.F) B) and C)
G) A) and E)

Question 12

Platinum, which is widely used as a catalyst, has a work functionΦ (the minimum energy needed to eject an electron from the metal surface)  of 9.05 × 10−19 J. What is the longest wavelength of light which will cause electrons to be emitted?

Accepted Answer

A)  2.196 × 10 −7 m
B)  4.553 × 10 −6 m
C)  5.654 × 10 2 m
D)  1.370 × 10 15 m
E)  > 10 6 mF) C) and D)
G) A) and B)

Question 13

Which of the following is a correct set of quantum numbers for an electron in a 3d orbital?

Accepted Answer

A)  n = 3, l = 0, ml = −1
B)  n = 3, l = 1, ml = +3
C)  n = 3, l = 2, ml = 3
D)  n = 3, l = 3, ml = +2
E)  n = 3, l = 2, ml = −2F) A) and B)
G) A) and C)

Question 14

Which scientist first proposed that particles of matter could have wave properties?

Accepted Answer

A)  Einstein
B)  Planck
C)  de Broglie
D)  Compton
E)  HeisenbergF) A) and B)
G) B) and D)

Question 15

Which word best describes the phenomenon which gives rise to a rainbow?

Accepted Answer

A)  Reflection
B)  Dispersion
C)  Diffraction
D)  Interference
E)  DeflectionF) B) and C)
G) A) and E)

Question 16

Who developed an empirical equation from which the wavelengths of lines in the spectrum of hydrogen atoms can be calculated?

Accepted Answer

A)  Planck
B)  de Broglie
C)  Bohr
D)  Rutherford
E)  RydbergF) All of the above
G) A) and B)

Question 17

The Rydberg equation is an example of an empirical equation.

Accepted Answer

A) True 
 B)False

Question 18

What type of spectrum, if any, would be produced if the light radiated by a heated atomic gas were to be dispersed through a prism?

Accepted Answer

A)  A continuous band of color
B)  A continuous band of color with some dark lines (missing wavelengths) 
C)  Only blue light
D)  Only red light
E)  Discrete lines of different colorsF) B) and E)
G) A) and B)

Question 19

In the quantum mechanical treatment of the hydrogen atom, the probability of finding an electron at any point is proportional to the wave function Ψ.

Accepted Answer

A) True 
 B)False

Question 20

Interference of light waves

Accepted Answer

A)  separates light into its component colors.
B)  creates a pattern of light and dark regions.
C)  focuses a broad beam of light into a point.
D)  bends light as it passes the edge of an object.
E)  creates a laser beam.F) A) and E)
G) C) and E)

Exam 7: Quantum Theory and Atomic Structure

In the quantum mechanical treatment of the hydrogen atom, the probability of finding an electron at any point is proportional to the wave function Ψ.

Correct AnswerverifiedShow Answer

Which scientist first proposed that particles of matter could have wave properties?

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Continuous spectra are characteristic of heated solids.

Correct AnswerverifiedShow Answer

What type of spectrum, if any, would be produced if the light radiated by a heated atomic gas were to be dispersed through a prism?

Correct AnswerverifiedShow Answer

Which of the following is a correct set of quantum numbers for an electron in a 3d orbital?

Correct AnswerverifiedShow Answer

Atomic orbitals developed using quantum mechanics

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The orientation in space of an atomic orbital is associated with

Correct AnswerverifiedShow Answer

Excited hydrogen atoms radiate energy in the

Correct AnswerverifiedShow Answer

In the quantum mechanical treatment of the hydrogen atom, which one of the following combinations of quantum numbers is not allowed?

Correct AnswerverifiedShow Answer

The Rydberg equation is an example of an empirical equation.

Correct AnswerverifiedShow Answer

Which scientist demonstrated that photons transferred momentum during collisions with matter?

Correct AnswerverifiedShow Answer

Who proposed a model that successfully explained the photoelectric effect?

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Which word best describes the phenomenon which gives rise to a rainbow?

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Interference of light waves

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Who developed an empirical equation from which the wavelengths of lines in the spectrum of hydrogen atoms can be calculated?

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Green light has a wavelength of 5200 Å. Calculate the energy of one photon of green light.

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Continuous spectra are characteristic of molecules in the gas phase.

Correct AnswerverifiedShow Answer

Consider the following adjectives used to describe types of spectrum: continuous, line, atomic, emission and absorption.How many of them are appropriate to describe the spectrum of radiation given off by a black body?

Correct AnswerverifiedShow Answer

Platinum, which is widely used as a catalyst, has a work functionΦ (the minimum energy needed to eject an electron from the metal surface) of 9.05 × 10−19 J. What is the longest wavelength of light which will cause electrons to be emitted?

Correct AnswerverifiedShow Answer

The Rydberg equation, giving the wavelengths of lines in the spectrum of the hydrogen atom, was obtained by assuming that energy is quantized.

Correct AnswerverifiedShow Answer

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Platinum, which is widely used as a catalyst, has a work functionΦ (the minimum energy needed to eject an electron from the metal surface) of 9.05 × 10⁻¹⁹ J. What is the longest wavelength of light which will cause electrons to be emitted?

Correct Answer
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