Question 1

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 = 5F) B) and D)
G) A) and B)

Question 2

According to the Rydberg equation, the longest wavelength (in nm)  in the series of H-atom lines with n1 = 3 is

Accepted Answer

A)   1875 nm.
B)   1458 nm.
C)   820. nm.
D)   656 nm.
E)   365 nm.F) B) and C)
G) A) and C)

Question 3

The Rydberg equation is an example of an empirical equation.

Accepted Answer

A) True 
 B)False

Question 4

Contact lenses can focus light due to the ____________ of the waves.

Accepted Answer

A)   diffraction
B)   reflection
C)   refraction
D)   dispersion
E)   interferenceF) A) and B)
G) A) and C)

Question 5

The ionization energy is the energy needed to remove an electron from an atom. In the Bohr model of the hydrogen atom, this means exciting the electron to the n = ∞ state. What is the ionization energy in kJ/mol, for hydrogen atoms initially in the n = 2 energy level?

Accepted Answer

A)   290 kJ/mol
B)   328 kJ/mol
C)   656 kJ/mol
D)   983 kJ/mol
E)   1311 kJ/molF) A) and E)
G) A) and D)

Question 6

A wave function for an electron is called an atomic orbital.

Accepted Answer

A) True 
 B)False

Question 7

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 × 102 m
E)   > 103 mF) None of the above
G) A) and D)

Question 8

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.F) C) and D)
G) A) and B)

Question 9

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 absorbed by a sample of mercury vapor?

Accepted Answer

A)   one
B)   two
C)   three
D)   four
E)   fiveF) None of the above
G) A) and D)

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

Who was the first scientist to propose that the atom had a dense nucleus that occupied only a small fraction of the volume of the atom?

Accepted Answer

A)   Planck
B)   Bohr
C)   Rydberg
D)   Rutherford
E)   ThomsonF) A) and C)
G) D) and E)

Question 12

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

Accepted Answer

A)   Bohr
B)   de Broglie
C)   Planck
D)   Compton
E)   BilliardF) C) and E)
G) A) and E)

Question 13

Who proposed the principle that states that one cannot simultaneously know the exact position and velocity of a particle?

Accepted Answer

A)   Einstein
B)   Planck
C)   Heisenberg
D)   Compton
E)   de BroglieF) A) and B)
G) B) and C)

Question 14

An infrared wave has a wavelength of 6.5 × 10-4 cm. What is this distance in angstroms, Å?

Accepted Answer

A)   6.5 × 10-4 Å
B)   2.2 × 10-4 Å
C)   4.6 × 103 Å
D)   6.5 × 104 Å
E)   6.5 × 106 ÅF) A) and C)
G) C) and D)

Question 15

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) None of the above

Question 16

The interference pattern seen when light passes through narrow, closely spaced slits, is due to

Accepted Answer

A)   diffraction.
B)   reflection.
C)   refraction.
D)   dispersion.
E)   deflection.F) A) and E)
G) A) and D)

Question 17

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

Question 18

The energy of an electron in the hydrogen atom is determined by

Accepted Answer

A)   the principal quantum number (n)  only.
B)   the angular momentum quantum number (l)  only.
C)   the principal and angular momentum quantum numbers (n & l ) .
D)   the principal and magnetic quantum numbers (n & ml) .
E)   the principal, angular momentum and magnetic quantum numbers.F) B) and E)
G) A) and E)

Question 19

The Bohr theory of the hydrogen atom predicts the energy difference (in J)  between the n = 3 and the n = 5 state to be

Accepted Answer

A)   8.72 × 10-20 J.
B)   1.36 × 10-19 J.
C)   2.42 × 10-19 J.
D)   1.55 × 10-19 J.
E)   1.09 × 10-18 J.F) A) and D)
G) C) and D)

Question 20

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

Accepted Answer

A)   radio, infrared, ultraviolet, gamma rays
B)   radio, ultraviolet, infrared, gamma rays
C)   gamma rays, radio, ultraviolet, infrared
D)   gamma rays, infrared, radio, ultraviolet
E)   gamma rays, ultraviolet, infrared, radioF) None of the above
G) All of the above

Exam 7: Quantum Theory and Atomic Structure

The ionization energy is the energy needed to remove an electron from an atom. In the Bohr model of the hydrogen atom, this means exciting the electron to the n = ∞ state. What is the ionization energy in kJ/mol, for hydrogen atoms initially in the n = 2 energy level?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Who proposed the principle that states that one cannot simultaneously know the exact position and velocity of a particle?

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

A wave function for an electron is called an atomic orbital.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

Interference of light waves

Correct AnswerverifiedShow Answer

The Bohr theory of the hydrogen atom predicts the energy difference (in J) between the n = 3 and the n = 5 state to be

Correct AnswerverifiedShow Answer

According to the Rydberg equation, the longest wavelength (in nm) in the series of H-atom lines with n1 = 3 is

Correct AnswerverifiedShow Answer

An infrared wave has a wavelength of 6.5 × 10-4 cm. What is this distance in angstroms, Å?

Correct AnswerverifiedShow Answer

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 absorbed by a sample of mercury vapor?

Correct AnswerverifiedShow Answer

Who was the first scientist to propose that the atom had a dense nucleus that occupied only a small fraction of the volume of the atom?

Correct AnswerverifiedShow Answer

The energy of an electron in the hydrogen atom is determined by

Correct AnswerverifiedShow Answer

The Rydberg equation is an example of an empirical equation.

Correct AnswerverifiedShow Answer

The interference pattern seen when light passes through narrow, closely spaced slits, is due to

Correct AnswerverifiedShow Answer

Contact lenses can focus light due to the ____________ of the waves.

Correct AnswerverifiedShow 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
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According to the Rydberg equation, the longest wavelength (in nm) in the series of H-atom lines with n₁ = 3 is

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An infrared wave has a wavelength of 6.5 × 10^-4 cm. What is this distance in angstroms, Å?

Correct Answer
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