Question 1

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 × 10 8 s −1
E)  8.35 × 10 16 s −1

Question 2

A modern compact fluorescent lamp contains 1.4 mg of mercury. If each mercury atom in the lamp were to emit a single photon of wavelength 254 nm, how many joules of energy would be emitted?

Accepted Answer

A)  7.8 × 10 −19 J
B)  3.3 J
C)  6.6 × 10 2 J
D)  3.3 × 10 3 J
E)  4.2 × 10 18 J

Question 3

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.

Question 4

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 × 10 2 nm.
D)  1.10 × 10 16 nm.
E)  None of these choices are correct. A

Question 5

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 megahertz

Question 6

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 J E

Question 7

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.

Question 8

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 × 10 14 m/s
B)  3.7 × 10 11 m/s
C)  1.9 × 10 6 m/s
D)  6.1 × 10 5 m/s
E)  1.7 × 10 −19 m/s

Question 9

Line spectra are characteristic of atoms in the gas phase.

Accepted Answer

A) True 
 B)False

Question 10

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.

Question 11

An electron in the n = 6 level emits a photon with a wavelength of 410.2 nm. To what energy level does the electron move?

Accepted Answer

A)  n = 1
B)  n = 2
C)  n = 3
D)  n = 4
E)  n = 5

Question 12

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

Accepted Answer

A) True 
 B)False  False

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.

Question 14

According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 × 103 m/s, the uncertainty in its position (in m)  is at least

Accepted Answer

A)  1.7 × 10 −8 m.
B)  6.6 × 10 −8 m.
C)  17 m.
D)  66 m.
E)  None of these choices are correct.

Question 15

The FM station KDUL broadcasts music at 99.1 MHz. Find the wavelength of these waves.

Accepted Answer

A)  1.88 × 10 −2 m
B)  0.330 m
C)  3.03 m
D)  5.33 × 10 2 m
E)  > 10 3 m

Question 16

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 absorbed by a sample of mercury vapor?

Accepted Answer

A)  One
B)  Two
C)  Three
D)  Four
E)  Five

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

As the frequency of electromagnetic radiation increases, its wavelength also increases.

Accepted Answer

A) True 
 B)False

Question 19

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, ultraviolet

Question 20

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 rays

Exam 7: Quantum Theory and Atomic Structure

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

Correct Answer
verified

A modern compact fluorescent lamp contains 1.4 mg of mercury. If each mercury atom in the lamp were to emit a single photon of wavelength 254 nm, how many joules of energy would be emitted?

Correct Answer
verified

The size of an atomic orbital is associated with

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
A

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

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
E

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
verified

Correct Answer
verified

Line spectra are characteristic of atoms in the gas phase.

Correct Answer
verified

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

Correct Answer
verified

An electron in the n = 6 level emits a photon with a wavelength of 410.2 nm. To what energy level does the electron move?

Correct Answer
verified

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

Correct Answer
verified
False

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
verified

According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 × 10³ m/s, the uncertainty in its position (in m) is at least

Correct Answer
verified

The FM station KDUL broadcasts music at 99.1 MHz. Find the wavelength of these waves.

Correct Answer
verified

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 absorbed by a sample of mercury vapor?

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 m_l_.

Correct Answer
verified

As the frequency of electromagnetic radiation increases, its wavelength also increases.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

Exam 7: Quantum Theory and Atomic Structure

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

Correct AnswerverifiedShow Answer

A modern compact fluorescent lamp contains 1.4 mg of mercury. If each mercury atom in the lamp were to emit a single photon of wavelength 254 nm, how many joules of energy would be emitted?

Correct AnswerverifiedShow Answer

The size of an atomic orbital is associated with

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 AnswerverifiedA

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedE

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

Correct AnswerverifiedShow Answer

Line spectra are characteristic of atoms in the gas phase.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

An electron in the n = 6 level emits a photon with a wavelength of 410.2 nm. To what energy level does the electron move?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedFalse

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 AnswerverifiedShow Answer

According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 × 103 m/s, the uncertainty in its position (in m) is at least

Correct AnswerverifiedShow Answer

The FM station KDUL broadcasts music at 99.1 MHz. Find the wavelength of these waves.

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 absorbed by a sample of mercury vapor?

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

As the frequency of electromagnetic radiation increases, its wavelength also increases.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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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A

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E

Correct Answer
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Correct Answer
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Correct Answer
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False

Correct Answer
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According to the Heisenberg uncertainty principle, if the uncertainty in the speed of an electron is 3.5 × 10³ m/s, the uncertainty in its position (in m) is at least

Correct Answer
verified

Correct Answer
verified

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 m_l_.

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
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