Question 1

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 E)
G) C) and E)

Question 2

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

Accepted Answer

A)  diffraction
B)  reflection
C)  refraction
D)  dispersion
E)  interferenceF) C) and E)
G) All of the above

Question 3

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 × 10 6 m.
D)  2.52 × 10 9 m.
E)  > 10 10 m.F) A) and B)
G) A) and C)

Question 4

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

Question 5

In the Rydberg equation, for a fixed value of n1, the longest wavelength line has n2 = ∞.

Accepted Answer

A) True 
 B)False

Question 6

Electromagnetic radiation can be specified by its wavelength (λ) , its frequency (υ)  or its period (τ) . The period τ is the time it takes one complete wavelength to pass a point in space. Based on this information, what is the mathematical relationship between υ and τ?

Accepted Answer

A)  υ = 1/τ
B)  υ= τ
C)  τ = υ/ с
D)  с = τ × υ
E)  τ = с/υF) A) and B)
G) A) and C)

Question 7

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) D) and E)

Question 8

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

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

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) B) and D)
G) A) and D)

Question 11

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

Question 12

For potassium metal, the work functionΦ (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) C) and D)

Question 13

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

Question 14

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 E)

Question 15

If the energy of a photon is 1.32 × 10−18 J, what is its wavelength in nm?

Accepted Answer

A)  1.50 × 10 −7 nm
B)  150 nm
C)  1.99 × 10 15 nm
D)  1.99 × 10 24 nm
E)  None of these choices are correct.F) B) and C)
G) A) and C)

Question 16

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

Question 17

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

Question 18

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 × 10 6 s −1
B)  2.742 × 10 6 s −1
C)  6.165 × 10 14 s −1
D)  8.226 × 10 14 s −1
E)  > 10 15 s −1F) C) and D)
G) A) and E)

Question 19

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) C) and D)
G) B) and C)

Question 20

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

Exam 7: Quantum Theory and Atomic Structure

Electromagnetic radiation can be specified by its wavelength (λ) , its frequency (υ) or its period (τ) . The period τ is the time it takes one complete wavelength to pass a point in space. Based on this information, what is the mathematical relationship between υ and τ?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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 Answer
verified

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

Correct Answer
verified

For potassium metal, the work functionΦ (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

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

Correct Answer
verified

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

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

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

If the energy of a photon is 1.32 × 10⁻¹⁸J, what is its wavelength in nm?

Correct Answer
verified

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 Answer
verified

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

Correct Answer
verified

Correct Answer
verified

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
verified

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

Correct Answer
verified

In the Rydberg equation, for a fixed value of n₁, the longest wavelength line has n₂ = ∞.

Correct Answer
verified

Exam 7: Quantum Theory and Atomic Structure

Electromagnetic radiation can be specified by its wavelength (λ) , its frequency (υ) or its period (τ) . The period τ is the time it takes one complete wavelength to pass a point in space. Based on this information, what is the mathematical relationship between υ and τ?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

For potassium metal, the work functionΦ (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

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

Correct AnswerverifiedShow Answer

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

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 AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

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

Correct AnswerverifiedShow Answer

If the energy of a photon is 1.32 × 10−18 J, what is its wavelength in nm?

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

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

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedShow Answer

In the Rydberg equation, for a fixed value of n1, the longest wavelength line has n2 = ∞.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

For potassium metal, the work functionΦ (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
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

If the energy of a photon is 1.32 × 10⁻¹⁸J, what is its wavelength in nm?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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
verified

Correct Answer
verified

In the Rydberg equation, for a fixed value of n₁, the longest wavelength line has n₂ = ∞.

Correct Answer
verified