Question 1

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) None of the above
G) A) and B)

Question 2

Platinum, which is widely used as a catalyst, has a work function 19 J. What is the longest wavelength of light which will cause electrons to be emitted? A)  2.196 × 10-7 m B)  4.553 × 10-6 m C)  5.654 × 102 m D)  1.370 × 1015 m E)  > 106 m" class="answers-bank-image d-inline" rel="preload" > (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 × 102 m
D)   1.370 × 1015 m
E)   > 106 mF) None of the above
G) B) and C)

Question 3

In the Bohr model of the hydrogen atom, the electron moves in a circular path which Bohr referred to as an orbital.

Accepted Answer

A) True 
 B)False  False

Question 4

The de Broglie equation predicts that the wavelength (in m)  of a proton moving at 1000. m/s is

Accepted Answer

A)   3.96 × 10-10 m.
B)   3.96 × 10-7 m.
C)   2.52 × 106 m.
D)   2.52 × 109 m.
E)   > 1010 m.F) B) and D)
G) B) and C)

Question 5

Infrared radiation from the sun has a wavelength of 6200 nm. Calculate the energy of one photon of that radiation.

Accepted Answer

A)   4.l × 10-39 J
B)   4.l × 10-30 J
C)   3.2 × 10-29 J
D)   3.2 × 10-26 J
E)   between 10-20 and 10-19 JF) B) and E)
G) C) and E)

Question 6

The AM station KBOR plays your favorite music from the 20's and 30's at 1290 kHz. Find the wavelength of these waves.

Accepted Answer

A)   4.30 × 10-2 m
B)   0.144 m
C)   6.94 m
D)   232 m
E)   > 103 mF) A) and B)
G) C) and D)

Question 7

The energy of a photon is directly proportional to the wavelength of the radiation.

Accepted Answer

A) True 
 B)False

Question 8

Line spectra are characteristic of atoms in the gas phase.

Accepted Answer

A) True 
 B)False

Question 9

A photon has an energy of 5.53 × 10-17 J. What is its frequency in s-1?

Accepted Answer

A)   3.66 × 10-50 s-1
B)   1.20 × 10-17 s-1
C)   3.59 × 10-9 s-1
D)   2.78 × 108 s-1
E)   8.35 × 1016 s-1F) B) and C)
G) All of the above

Question 10

Continuous spectra are characteristic of heated solids.

Accepted Answer

A) True 
 B)False

Question 11

Line spectra from all regions of the electromagnetic spectrum, including the Paschen series of infrared lines for hydrogen, are used by astronomers to identify elements present in the atmospheres of stars. Calculate the wavelength of the photon emitted when the hydrogen atom undergoes a transition from n = 5 to n = 3. (R = 1.096776 × 107 m-1)

Accepted Answer

A)   205.1 nm
B)   384.6 nm
C)   683.8 nm
D)   1282 nm
E)   > 1500 nmF) A) and B)
G) C) and D)

Question 12

In an atom, the square of an electron's wave function

Accepted Answer

A)   becomes zero at the nucleus.
B)   is smallest near the nucleus.
C)   is largest near the nucleus.
D)   may be zero at more than one point.
E)   tends to infinity at large distances from the nucleus.F) C) and E)
G) A) and B)

Question 13

According to the Bohr theory of the hydrogen atom, the minimum energy (in J)  needed to ionize a hydrogen atom from the n = 2 state is

Accepted Answer

A)   2.18 × 10-18 J.
B)   1.64 × 10-18 J.
C)   5.45 × 10-19 J.
D)   3.03 × 10-19 J.
E)   None of these choices are correct.F) A) and E)
G) C) and D) C

Question 14

A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?

Accepted Answer

A)   7.29 × 10-37 m
B)   3.26 × 10-37 m
C)   5.08 × 10-30 m
D)   1.34 × 10-30 m
E)   None of these choices are correct.F) A) and C)
G) A) and D)

Question 15

Use the Rydberg equation to calculate the frequency of a photon absorbed when the hydrogen atom undergoes a transition from n1 = 2 to n2 = 4. (R = 1.096776 × 107 m-1)

Accepted Answer

A)   2.056 × 106 s-1
B)   2.742 × 106 s-1
C)   6.165 × 1014 s-1
D)   8.226 × 1014 s-1
E)   > 1015 s-1F) A) and B)
G) D) and E)

Question 16

Which of the following frequencies of electromagnetic radiation has the shortest wavelength?

Accepted Answer

A)   1 kilohertz
B)   1 terahertz
C)   1 dekahertz
D)   1 gigahertz
E)   1 megahertzF) None of the above
G) A) and C) B

Question 17

Which scientist first proposed that the electron in the hydrogen atom can have only certain energies?

Accepted Answer

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

Question 18

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) B) and E)
G) A) and E)

Question 19

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) All of the above
G) A) and E)

Question 20

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 E)
G) A) and B)

Exam 7: Quantum Theory and Atomic Structure

Atomic orbitals developed using quantum mechanics

Correct Answer
verified

Platinum, which is widely used as a catalyst, has a work function (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
verified

In the Bohr model of the hydrogen atom, the electron moves in a circular path which Bohr referred to as an orbital.

Correct Answer
verified
False

The de Broglie equation predicts that the wavelength (in m) of a proton moving at 1000. m/s is

Correct Answer
verified

Infrared radiation from the sun has a wavelength of 6200 nm. Calculate the energy of one photon of that radiation.

Correct Answer
verified

The AM station KBOR plays your favorite music from the 20's and 30's at 1290 kHz. Find the wavelength of these waves.

Correct Answer
verified

The energy of a photon is directly proportional to the wavelength of the radiation.

Correct Answer
verified

Line spectra are characteristic of atoms in the gas phase.

Correct Answer
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A photon has an energy of 5.53 × 10^-17 J. What is its frequency in s^-1?

Correct Answer
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Continuous spectra are characteristic of heated solids.

Correct Answer
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Correct Answer
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In an atom, the square of an electron's wave function

Correct Answer
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According to the Bohr theory of the hydrogen atom, the minimum energy (in J) needed to ionize a hydrogen atom from the n = 2 state is

Correct Answer
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C

A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?

Correct Answer
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Use the Rydberg equation to calculate the frequency of a photon absorbed when the hydrogen atom undergoes a transition from n₁ = 2 to n₂ = 4. (R = 1.096776 × 10⁷ m^-1)

Correct Answer
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Which of the following frequencies of electromagnetic radiation has the shortest wavelength?

Correct Answer
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B

Which scientist first proposed that the electron in the hydrogen atom can have only certain energies?

Correct Answer
verified

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

Correct Answer
verified

The orientation in space of an atomic orbital is associated with

Correct Answer
verified

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

Correct Answer
verified

Exam 7: Quantum Theory and Atomic Structure

Atomic orbitals developed using quantum mechanics

Correct AnswerverifiedShow Answer

Platinum, which is widely used as a catalyst, has a work function (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

In the Bohr model of the hydrogen atom, the electron moves in a circular path which Bohr referred to as an orbital.

Correct AnswerverifiedFalse

The de Broglie equation predicts that the wavelength (in m) of a proton moving at 1000. m/s is

Correct AnswerverifiedShow Answer

Infrared radiation from the sun has a wavelength of 6200 nm. Calculate the energy of one photon of that radiation.

Correct AnswerverifiedShow Answer

The AM station KBOR plays your favorite music from the 20's and 30's at 1290 kHz. Find the wavelength of these waves.

Correct AnswerverifiedShow Answer

The energy of a photon is directly proportional to the wavelength of the radiation.

Correct AnswerverifiedShow Answer

Line spectra are characteristic of atoms in the gas phase.

Correct AnswerverifiedShow Answer

A photon has an energy of 5.53 × 10-17 J. What is its frequency in s-1?

Correct AnswerverifiedShow Answer

Continuous spectra are characteristic of heated solids.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In an atom, the square of an electron's wave function

Correct AnswerverifiedShow Answer

According to the Bohr theory of the hydrogen atom, the minimum energy (in J) needed to ionize a hydrogen atom from the n = 2 state is

Correct AnswerverifiedC

A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?

Correct AnswerverifiedShow Answer

Use the Rydberg equation to calculate the frequency of a photon absorbed when the hydrogen atom undergoes a transition from n1 = 2 to n2 = 4. (R = 1.096776 × 107 m-1)

Correct AnswerverifiedShow Answer

Which of the following frequencies of electromagnetic radiation has the shortest wavelength?

Correct AnswerverifiedB

Which scientist first proposed that the electron in the hydrogen atom can have only certain energies?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The orientation in space of an atomic orbital is associated with

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Platinum, which is widely used as a catalyst, has a work function (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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Correct Answer
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False

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A photon has an energy of 5.53 × 10^-17 J. What is its frequency in s^-1?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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C

Correct Answer
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Use the Rydberg equation to calculate the frequency of a photon absorbed when the hydrogen atom undergoes a transition from n₁ = 2 to n₂ = 4. (R = 1.096776 × 10⁷ m^-1)

Correct Answer
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Correct Answer
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B

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Correct Answer
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