Question 1

Other factors being constant, a heavy object will have a longer de Broglie wavelength than a light object.

Accepted Answer

A) True 
 B)False

Question 2

A radio wave has a frequency of 8.6 × 108 Hz. What is the energy of one photon of this radiation?

Accepted Answer

A)   7.7 × 10-43 J
B)   2.3 × 10-34 J
C)   5.7 × 10-25 J
D)   1.7 × 10-16 J
E)   > 10-15 JF) None of the above
G) A) and E)

Question 3

According to the Rydberg equation, the line with the shortest wavelength in the emission spectrum of atomic hydrogen is predicted to lie at a wavelength (in nm)  of

Accepted Answer

A)   91.2 nm.
B)   1.10 × 10-2 nm.
C)   1.10 × 102 nm.
D)   1.10 × 1016 nm.
E)   None of these choices are correct.F) C) and D)
G) D) and E)

Question 4

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) C) and D)
G) A) and C)

Question 5

Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy.

Accepted Answer

A)   radio, visible, infrared, ultraviolet
B)   infrared, visible, ultraviolet, microwave
C)   visible, ultraviolet, infrared, gamma rays
D)   X-radiation, visible, infrared, microwave
E)   microwave, infrared, visible, ultravioletF) A) and C)
G) B) and E)

Question 6

Which of the following is a correct set of quantum numbers for an electron in a 5f orbital?

Accepted Answer

A)   n = 5, l = 3, ml = +1
B)   n = 5, l = 2, ml = +3
C)   n = 4, l = 3, ml = 0
D)   n = 4, l = 2, ml = +1
E)   n = 5, l = 4, ml = 3F) A) and B)
G) B) and E)

Question 7

The size 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)   the angular momentum and magnetic quantum numbers, together.F) B) and E)
G) B) and D)

Question 8

Consider the following adjectives used to describe types of spectrum: continuous line atomic emission 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) All of the above
G) C) and E)

Question 9

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 10

Electromagnetic radiation of 500 nm wavelength lies in the __________ region of the spectrum.

Accepted Answer

A)   infrared
B)   visible
C)   ultraviolet
D)   X-ray
E)    -rayF) B) and C)
G) B) and E)

Question 11

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) C) and E)

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

In the photoelectric effect, a photon with an energy of 5.3 × 10-19 J strikes an electron in a metal. Of this energy, 3.6 × 10-19 J is the minimum energy required for the electron to escape from the metal. The remaining energy appears as kinetic energy of the photoelectron. What is the velocity of the photoelectron, assuming it was initially at rest?

Accepted Answer

A)   3.7 × 1014 m/s
B)   3.7 × 1011 m/s
C)   1.9 × 106 m/s
D)   6.1 × 105 m/s
E)   1.7 × 10-19 m/sF) B) and D)
G) C) and E)

Question 14

For potassium metal, the work function -19 J. Which is the longest wavelength of the following which could excite photoelectrons? A)  550. nm B)  500. nm C)  450. nm D)  400. nm E)  350. nm" class="answers-bank-image d-inline" rel="preload" > (the minimum energy needed to eject an electron from the metal surface)  is 3.68 × 10-19 J. Which is the longest wavelength of the following which could excite photoelectrons?

Accepted Answer

A)   550. nm
B)   500. nm
C)   450. nm
D)   400. nm
E)   350. nmF) B) and E)
G) A) and C)

Question 15

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 C)
G) C) and D)

Question 16

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

Accepted Answer

A)   reflection
B)   dispersion
C)   diffraction
D)   interference
E)   deflectionF) D) and E)
G) A) and D)

Question 17

In the quantum mechanical treatment of the hydrogen atom, the energy depends on the principal quantum number n but not on the values of l or ml.

Accepted Answer

A) True 
 B)False

Question 18

Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy.

Accepted Answer

A)   radio, infrared, ultraviolet, gamma rays
B)   radio, ultraviolet, infrared, gamma rays
C)   gamma rays, infrared, radio, ultraviolet
D)   gamma rays, ultraviolet, infrared, radio
E)   infrared, ultraviolet, radio, gamma raysF) C) and E)
G) B) and C)

Question 19

Who was the first scientist to propose that an object could emit only certain amounts of energy?

Accepted Answer

A)   Planck
B)   Einstein
C)   Bohr
D)   Rydberg
E)   de BroglieF) A) and E)
G) All of the above

Question 20

Who proposed a model that successfully explained the photoelectric effect?

Accepted Answer

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

Exam 7: Quantum Theory and Atomic Structure

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

Correct Answer
verified

For potassium metal, the work function (the minimum energy needed to eject an electron from the metal surface) is 3.68 × 10^-19 J. Which is the longest wavelength of the following which could excite photoelectrons?

Correct Answer
verified

In the quantum mechanical treatment of the hydrogen atom, the energy depends on the principal quantum number n but not on the values of l or ml.

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Who proposed a model that successfully explained the photoelectric effect?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy.

Correct Answer
verified

Excited hydrogen atoms radiate energy in the

Correct Answer
verified

According to the Rydberg equation, the line with the shortest wavelength in the emission spectrum of atomic hydrogen is predicted to lie at a wavelength (in nm) of

Correct Answer
verified

Other factors being constant, a heavy object will have a longer de Broglie wavelength than a light object.

Correct Answer
verified

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

Correct Answer
verified

Electromagnetic radiation of 500 nm wavelength lies in the __________ region of the spectrum.

Correct Answer
verified

Who was the first scientist to propose that an object could emit only certain amounts of energy?

Correct Answer
verified

Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy.

Correct Answer
verified

The size of an atomic orbital is associated with

Correct Answer
verified

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

Correct Answer
verified

Which of the following is a correct set of quantum numbers for an electron in a 5f orbital?

Correct Answer
verified

A radio wave has a frequency of 8.6 × 10⁸ Hz. What is the energy of one photon of this radiation?

Correct Answer
verified

Exam 7: Quantum Theory and Atomic Structure

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

Correct AnswerverifiedShow Answer

For potassium metal, the work function (the minimum energy needed to eject an electron from the metal surface) is 3.68 × 10-19 J. Which is the longest wavelength of the following which could excite photoelectrons?

Correct AnswerverifiedShow Answer

In the quantum mechanical treatment of the hydrogen atom, the energy depends on the principal quantum number n but not on the values of l or ml.

Correct AnswerverifiedShow Answer

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

Who proposed a model that successfully explained the photoelectric effect?

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

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

Correct AnswerverifiedShow Answer

Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy.

Correct AnswerverifiedShow Answer

Excited hydrogen atoms radiate energy in the

Correct AnswerverifiedShow Answer

According to the Rydberg equation, the line with the shortest wavelength in the emission spectrum of atomic hydrogen is predicted to lie at a wavelength (in nm) of

Correct AnswerverifiedShow Answer

Other factors being constant, a heavy object will have a longer de Broglie wavelength than a light object.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Electromagnetic radiation of 500 nm wavelength lies in the __________ region of the spectrum.

Correct AnswerverifiedShow Answer

Who was the first scientist to propose that an object could emit only certain amounts of energy?

Correct AnswerverifiedShow Answer

Select the arrangement of electromagnetic radiation which starts with the lowest energy and increases to greatest energy.

Correct AnswerverifiedShow Answer

The size of an atomic orbital is associated with

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is a correct set of quantum numbers for an electron in a 5f orbital?

Correct AnswerverifiedShow Answer

A radio wave has a frequency of 8.6 × 108 Hz. What is the energy of one photon of this radiation?

Correct AnswerverifiedShow Answer

Correct Answer
verified

For potassium metal, the work function (the minimum energy needed to eject an electron from the metal surface) is 3.68 × 10^-19 J. Which is the longest wavelength of the following which could excite photoelectrons?

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

A radio wave has a frequency of 8.6 × 10⁸ Hz. What is the energy of one photon of this radiation?

Correct Answer
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