Question 1

Calculate the frequency of the light emitted by a hydrogen atom during a transition of its electron from the n = 4 to the n = 1 principal energy level.Recall that for hydrogen En = -2.18 × 10-18 J(1/n2 ) .(h = 6.63 × 10-34 J • s)

Accepted Answer

A)  3.08 × 1015 s-1
B)  1.03 × 108 s-1
C)  2.06 × 1014 s-1
D)  1.35 × 10-51 s-1
E)  8.22 × 1014 s-1F) D) and E)
G) A) and C)

Question 2

The most stable arrangement of electrons in orbitals of equal energy is the one in which the number of electrons with the same spin is maximized is

Accepted Answer

A)  the Pauli exclusion principle.
B)  Bohr's equation.
C)  Hund's rule.
D)  de Broglie's relation.
E)  Dalton's atomic theory.F) B) and C)
G) C) and D)

Question 3

How many electrons are there in the 2nd principal energy level (n = 2) of a phosphorus atom?

Accepted Answer

A)  3
B)  5
C)  6
D)  8
E)  10F) A) and D)
G) B) and E)

Question 4

___________ is the quantum number which describes the orientation of the orbital in space.

Accepted Answer

The magnet...

Question 5

What wavelength,in nm,can strike a metal surface and eject an electron at 1.89 × 10-19 J if the binding energy of the metal is 289 kJ/mol?

Accepted Answer

A)  1.89 × 10-19 nm
B)  2.75 nm
C)  189 nm
D)  290 nm
E)  297 nmF) None of the above
G) All of the above

Question 6

Select the correct electron configuration for sulfur (Z = 16) .

Accepted Answer

A)  1s21p62s22p6
B)  1s22s22p83s23p4
C)  1s22s22p83s23p2
D)  1s22s22p63s23p4
E)  1s22s22p63s23d4F) C) and D)
G) A) and D)

Question 7

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.F) B) and E)
G) A) and B)

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 ___________.(mass of an electron = 9.11 × 10-28 g)

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 is correct.F) A) and C)
G) C) and D)

Question 9

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm? (c = 3.00 × 108 m/s; h = 6.63 × 10-34 J • s; NA = 6.022 × 1023 moles-1)

Accepted Answer

A)  6.46 × 10-16 J
B)  6.46 × 10-25 J
C)  2.46 × 10-4 J
D)  12.4 kJ
E)  246 kJF) A) and B)
G) A) and C)

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

How many electrons are in the 4p orbitals of selenium?

Accepted Answer

A)  0
B)  2
C)  4
D)  5
E)  6F) A) and E)
G) B) and C)

Question 12

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 = 3.F) C) and D)
G) A) and D)

Question 13

List the following types of radiation from lowest frequency to highest frequency: microwave,X ray,ultraviolet,visible,and infrared

Accepted Answer

A)  microwave 
B)  X ray 
C)  visible 
D)  infrared 
E)  infrared < visible < microwave < ultraviolet < X rayF) C) and D)
G) All of the above

Question 14

If one electron is added to the outer shell of chlorine,to which element would the configuration be similar?

Accepted Answer

The answer of If one electron is added to the...

Question 15

a.Planck

Accepted Answer

b.A blackbody can only emit or...

Question 16

The FM station KDUL broadcasts music at 99.1 MHz.Find the wavelength of these waves.(c = 3.00 × 108 m/s)

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 E)

Question 17

The magnetic quantum number designates the shape of the atomic orbital.

Accepted Answer

A) True 
 B)False

Question 18

An atom in its ground state contains 33 electrons.How many of these electrons are in p orbitals?

Accepted Answer

A)  15
B)  12
C)  3
D)  33
E)  None of theF) A) and E)
G) A) and D)

Question 19

A radio wave has a frequency of 8.6 × 108 Hz.What is the energy of one photon of this radiation? (h = 6.63 × 10-34 J • s)

Accepted Answer

A)  7.7 × 10-43 J
B)  2.3 × 10-34 J
C)  5.7 × 10-25 J
D)  1.7 × 10-16 J
E)  > 10-15 JF) A) and D)
G) B) and E)

Question 20

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; c = 3.00 × 108 m/s)

Accepted Answer

A)  2.06 × 106 s-1
B)  2.74 × 106 s-1
C)  6.17 × 1014 s-1
D)  8.23 × 1014 s-1
E)  > 1015 s-1F) A) and D)
G) B) and E)

Exam 6: Quantum Theory and the Electronic Structure of Atoms

Select the correct electron configuration for sulfur (Z = 16) .

Correct AnswerverifiedShow Answer

The most stable arrangement of electrons in orbitals of equal energy is the one in which the number of electrons with the same spin is maximized is

Correct AnswerverifiedShow Answer

a.Planck

Correct Answerverifiedb.A blackbody can only emit or...View AnswerShow Answer

How many electrons are in the 4p orbitals of selenium?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What wavelength,in nm,can strike a metal surface and eject an electron at 1.89 × 10-19 J if the binding energy of the metal is 289 kJ/mol?

Correct AnswerverifiedShow Answer

If one electron is added to the outer shell of chlorine,to which element would the configuration be similar?

Correct AnswerverifiedShow Answer

___________ is the quantum number which describes the orientation of the orbital in space.

Correct AnswerverifiedThe magnet...View AnswerShow Answer

How many electrons are there in the 2nd principal energy level (n = 2) of a phosphorus atom?

Correct AnswerverifiedShow Answer

The size of an atomic orbital is associated with

Correct AnswerverifiedShow Answer

List the following types of radiation from lowest frequency to highest frequency: microwave,X ray,ultraviolet,visible,and infrared

Correct AnswerverifiedShow Answer

The FM station KDUL broadcasts music at 99.1 MHz.Find the wavelength of these waves.(c = 3.00 × 108 m/s)

Correct AnswerverifiedShow Answer

The magnetic quantum number designates the shape of the atomic orbital.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A radio wave has a frequency of 8.6 × 108 Hz.What is the energy of one photon of this radiation? (h = 6.63 × 10-34 J • s)

Correct AnswerverifiedShow Answer

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm? (c = 3.00 × 108 m/s; h = 6.63 × 10-34 J • s; NA = 6.022 × 1023 moles-1)

Correct AnswerverifiedShow Answer

An atom in its ground state contains 33 electrons.How many of these electrons are in p orbitals?

Correct AnswerverifiedShow Answer

Calculate the frequency of the light emitted by a hydrogen atom during a transition of its electron from the n = 4 to the n = 1 principal energy level.Recall that for hydrogen En = -2.18 × 10-18 J(1/n2 ) .(h = 6.63 × 10-34 J • s)

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; c = 3.00 × 108 m/s)

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 ___________.(mass of an electron = 9.11 × 10-28 g)

Correct AnswerverifiedShow Answer

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b.A blackbody can only emit or...
View Answer

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Correct Answer
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What wavelength,in nm,can strike a metal surface and eject an electron at 1.89 × 10^-1⁹ J if the binding energy of the metal is 289 kJ/mol?

Correct Answer
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Correct Answer
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Correct Answer
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The magnet...
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How many electrons are there in the 2^nd principal energy level (n = 2) of a phosphorus atom?

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The FM station KDUL broadcasts music at 99.1 MHz.Find the wavelength of these waves.(c = 3.00 × 10⁸ m/s)

Correct Answer
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Correct Answer
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Correct Answer
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A radio wave has a frequency of 8.6 × 10⁸ Hz.What is the energy of one photon of this radiation? (h = 6.63 × 10^-34 J • s)

Correct Answer
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What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm? (c = 3.00 × 10⁸ m/s; h = 6.63 × 10^-34 J • s; NA = 6.0²² × 10²³ moles^-1)

Correct Answer
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Correct Answer
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Calculate the frequency of the light emitted by a hydrogen atom during a transition of its electron from the n = 4 to the n = 1 principal energy level.Recall that for hydrogen En = -2.18 × 10^-1⁸ J(1/n² ) .(h = 6.63 × 10^-34 J • s)

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; c = 3.00 × 10⁸ m/s)

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 ___________.(mass of an electron = 9.11 × 10^-28 g)

Correct Answer
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