Question 1

In not more than three lines for each answer, briefly outline one important scientific contribution of each of the following:
a. Planck
b. de Broglie
c. Heisenberg

Accepted Answer

a. Planck is responsible for first propo...

Question 2

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 the above.F) A) and B)
G) A) and C)

Question 3

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

Question 4

Use the Rydberg equation to calculate the wavelength, in nm, of the least energetic (longest wavelength) line in the visible series (n1 = 2) of the spectrum of atomic hydrogen.

Accepted Answer

Question 5

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

Question 6

Line spectra are characteristic of atoms in the gas phase.

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

A) True 
 B)False

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 the above.F) All of the above
G) B) and E)

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

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) D) and E)
G) A) and E)

Question 11

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 12

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

Question 13

Continuous spectra are characteristic of molecules in the gas phase.

Accepted Answer

A) True 
 B)False

Question 14

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

Question 15

In the Rydberg equation, for a fixed value of n1, the longest wavelength line has n2 = F1F1F1S1F1F1F10.

Accepted Answer

A) True 
 B)False

Question 16

What type of spectrum, if any, would be produced if the light radiated by a heated atomic gas were to be dispersed through a prism?

Accepted Answer

A)   a continuous band of color
B)   a continuous band of color with some dark lines (missing wavelengths) 
C)   only blue light
D)   only red light
E)   discrete lines of different colorsF) C) and E)
G) B) and D)

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

Question 18

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 the above.F) B) and D)
G) A) and E)

Question 19

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 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 raysF) A) and C)
G) All of the above

Exam 7: Quantum Theory and Atomic Structure

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What type of spectrum, if any, would be produced if the light radiated by a heated atomic gas were to be dispersed through a prism?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In not more than three lines for each answer, briefly outline one important scientific contribution of each of the following: a. Planck b. de Broglie c. Heisenberg

Correct Answerverifieda. Planck is responsible for first propo...View AnswerShow Answer

Use the Rydberg equation to calculate the wavelength, in nm, of the least energetic (longest wavelength) line in the visible series (n1 = 2) of the spectrum of atomic hydrogen.

Correct AnswerverifiedShow Answer

Continuous spectra are characteristic of molecules in the gas phase.

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedShow Answer

Excited hydrogen atoms radiate energy in the

Correct AnswerverifiedShow Answer

Line spectra are characteristic of atoms in the gas phase.

Correct AnswerverifiedShow Answer

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

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

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow 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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a. Planck is responsible for first propo...
View Answer

Use the Rydberg equation to calculate the wavelength, in nm, of the least energetic (longest wavelength) line in the visible series (n₁ = 2) of the spectrum of atomic hydrogen.

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

Correct Answer
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Correct Answer
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