Question 1

The stimulated emission of photons from the excited atoms in a gas laser is prompted by which of the following?

Accepted Answer

A)   nearby presence of photons of same wavelength as those emitted
B)   high flux of electrons
C)   high voltage
D)   high temperatureE) B) and C)
F) A) and C)

Question 2

In an analysis relating Bohr's theory to the de Broglie wavelength of electrons, when an electron moves from the n = 1 level to the n = 3 level, the circumference for its orbit becomes 9 times greater. This occurs because:

Accepted Answer

A)   the wavelength of the electron becomes nine times as long.
B)   there are triple as many wavelengths, and each wavelength is triple in length.
C)   there are nine times as many wavelengths in the new orbit.
D)   the electron is moving nine times as fast.E) All of the above
F) B) and C)

Question 3

What is the maximum number of electrons that can occupy a 3d subshell?

Accepted Answer

A)   5
B)   14
C)   10
D)   18E) C) and D)
F) A) and C)

Question 4

Of the wavelengths emitted from a hydrogen gas discharge tube, those that are associated with transitions from higher levels down to the n = 1 level produce which of the following?

Accepted Answer

A)   infrared
B)   visible
C)   ultraviolet
D)   mixture of infrared and visibleE) B) and C)
F) None of the above

Question 5

The Paschen series of hydrogen corresponds to electron transitions from higher levels to n = 3. What is the longest wavelength in that series? (h = 6.63 * 10-34 J.s. The ground state of hydrogen is at -13.6 eV.)

Accepted Answer

A)   822 nm
B)   365 nm
C)   1880 nm
D)   1094 nmE) A) and C)
F) A) and B)

Question 6

How many electrons are in chlorine's (atomic number 17)  next to outer shell (n = 2) ?

Accepted Answer

A)   18
B)   4
C)   2
D)   8E) C) and D)
F) A) and D)

Question 7

Which of the following transitions in hydrogen from an initial state (ni)  to a final state (nf)  results in the least energy emitted?

Accepted Answer

A)   ni = 3, nf = 95
B)   ni = 80, nf = 2
C)   ni = 2, nf = 1
D)   ni = 1, nf = 3E) All of the above
F) A) and B)

Question 8

The restriction that no more than one electron may occupy a given quantum state in an atom was first stated by which of the following scientists?

Accepted Answer

A)   Bohr
B)   Pauli
C)   de Broglie
D)   HeisenbergE) B) and C)
F) All of the above

Question 9

In contrast to the plum-pudding model of the atom, Rutherford's model:

Accepted Answer

A)   was first to explain atoms emitting discrete frequencies.
B)   had the positive charge concentrated in a small region.
C)   eliminated radiation from accelerating charges.
D)   had the positive charge spread uniformly through the atom.E) B) and D)
F) C) and D)

Question 10

The quantum mechanical model of the hydrogen atom requires that if the principal quantum number = 6, there will be how many permitted orbital quantum numbers?

Accepted Answer

A)   3
B)   16
C)   6
D)   5E) B) and C)
F) C) and D)

Question 11

The wavelength of a coherent laser is 628 nm. What energy difference exists between the upper excited state involved and the lower unexcited ground state? (h = 6.63 *10-34 J.s, c = 3.00 *108 m/s, 1 eV = 1.60 *10-19 J, and 1 nm = 10-9 m)

Accepted Answer

A)   1.86 eV
B)   1.81 eV
C)   1.75 eV
D)   1.98 eVE) A) and B)
F) B) and D)

Question 12

Characteristic K X-rays are the result of:

Accepted Answer

A)   inner electron transitions.
B)   outer electron transitions.
C)   nuclear electron states.
D)   buckytubes.E) B) and D)
F) B) and C)

Question 13

When a wire carries high current causing it to glow, it will emit which type of spectrum?

Accepted Answer

A)   line absorption
B)   monochromatic
C)   continuous
D)   line emissionE) A) and B)
F) A) and C)

Question 14

A photon is emitted from a hydrogen atom that undergoes a transition from n = 3 to n = 2. Calculate the energy and wavelength of the photon. (The ionization energy of hydrogen is 13.6 eV, and h = 6.63 *10-34 J.s, c = 3.00 * 108 m/s, 1 eV = 1.60 *10-19 J, and 1 nm = 10-9 m)

Accepted Answer

A)   2.21 eV, 563 nm
B)   1.89 eV, 460 nm
C)   2.58 * 10-19 J, 658 nm
D)   3.02 * 10-19 J, 658 nmE) A) and B)
F) A) and C)

Question 15

The Bohr theory does not predict that:

Accepted Answer

A)   the approximate radius of a hydrogen atom is 5.3 *10-11 m.
B)   hydrogen atoms will give off the lines from the series ending in the n = 2 state.
C)   the ground state of hydrogen is spherically symmetric.
D)   it requires 13.6 eV to ionize hydrogen.E) A) and B)
F) A) and C)

Question 16

The Lyman series of hydrogen is made up of those transitions made from higher levels to n = 1. If the first line (n = 2 to n = 1)  in this series has a wavelength of 122 nm, what is the wavelength of the third line (n = 4 to n = 1) ?

Accepted Answer

A)   364 nm
B)   97.6 nm
C)   103 nm
D)   486 nmE) None of the above
F) A) and C)

Question 17

The quantum mechanical model of the hydrogen atom requires that if the orbital quantum number = 5, there will be how many permitted orbital magnetic quantum numbers allowed?

Accepted Answer

A)   7
B)   15
C)   5
D)   11E) None of the above
F) C) and D)

Question 18

The quantum mechanical model of the hydrogen atom requires that if the principal quantum number = 3, there will be permitted how many orbital magnetic quantum numbers?

Accepted Answer

A)   5
B)   8
C)   4
D)   7E) A) and D)
F) A) and C)

Question 19

When a hydrogen atom absorbs a photon that raises it to the n = 5 state, how many different energies are possible for the photon(s)  that may be emitted as the atom eventually returns to the ground state?

Accepted Answer

A)   5
B)   3
C)   4
D)   The correct value is not given.E) B) and D)
F) B) and C)

Question 20

For the n = 5 shell, what are the lowest values possible for  and  respectively?

Accepted Answer

A)   "-5, -5"
B)   "-4, -4"
C)   "0, -4"
D)   "0, 0"E) B) and D)
F) A) and B)

Exam 29: Atomic Theory

The stimulated emission of photons from the excited atoms in a gas laser is prompted by which of the following?

Correct AnswerverifiedShow Answer

The wavelength of a coherent laser is 628 nm. What energy difference exists between the upper excited state involved and the lower unexcited ground state? (h = 6.63 *10-34 J.s, c = 3.00 *108 m/s, 1 eV = 1.60 *10-19 J, and 1 nm = 10-9 m)

Correct AnswerverifiedShow Answer

A photon is emitted from a hydrogen atom that undergoes a transition from n = 3 to n = 2. Calculate the energy and wavelength of the photon. (The ionization energy of hydrogen is 13.6 eV, and h = 6.63 *10-34 J.s, c = 3.00 * 108 m/s, 1 eV = 1.60 *10-19 J, and 1 nm = 10-9 m)

Correct AnswerverifiedShow Answer

When a hydrogen atom absorbs a photon that raises it to the n = 5 state, how many different energies are possible for the photon(s) that may be emitted as the atom eventually returns to the ground state?

Correct AnswerverifiedShow Answer

The Lyman series of hydrogen is made up of those transitions made from higher levels to n = 1. If the first line (n = 2 to n = 1) in this series has a wavelength of 122 nm, what is the wavelength of the third line (n = 4 to n = 1) ?

Correct AnswerverifiedShow Answer

The quantum mechanical model of the hydrogen atom requires that if the principal quantum number = 6, there will be how many permitted orbital quantum numbers?

Correct AnswerverifiedShow Answer

In an analysis relating Bohr's theory to the de Broglie wavelength of electrons, when an electron moves from the n = 1 level to the n = 3 level, the circumference for its orbit becomes 9 times greater. This occurs because:

Correct AnswerverifiedShow Answer

How many electrons are in chlorine's (atomic number 17) next to outer shell (n = 2) ?

Correct AnswerverifiedShow Answer

What is the maximum number of electrons that can occupy a 3d subshell?

Correct AnswerverifiedShow Answer

Of the wavelengths emitted from a hydrogen gas discharge tube, those that are associated with transitions from higher levels down to the n = 1 level produce which of the following?

Correct AnswerverifiedShow Answer

Characteristic K X-rays are the result of:

Correct AnswerverifiedShow Answer

The Bohr theory does not predict that:

Correct AnswerverifiedShow Answer

The quantum mechanical model of the hydrogen atom requires that if the orbital quantum number = 5, there will be how many permitted orbital magnetic quantum numbers allowed?

Correct AnswerverifiedShow Answer

When a wire carries high current causing it to glow, it will emit which type of spectrum?

Correct AnswerverifiedShow Answer

The restriction that no more than one electron may occupy a given quantum state in an atom was first stated by which of the following scientists?

Correct AnswerverifiedShow Answer

In contrast to the plum-pudding model of the atom, Rutherford's model:

Correct AnswerverifiedShow Answer

The Paschen series of hydrogen corresponds to electron transitions from higher levels to n = 3. What is the longest wavelength in that series? (h = 6.63 * 10-34 J.s. The ground state of hydrogen is at -13.6 eV.)

Correct AnswerverifiedShow Answer

Which of the following transitions in hydrogen from an initial state (ni) to a final state (nf) results in the least energy emitted?

Correct AnswerverifiedShow Answer

The quantum mechanical model of the hydrogen atom requires that if the principal quantum number = 3, there will be permitted how many orbital magnetic quantum numbers?

Correct AnswerverifiedShow Answer

For the n = 5 shell, what are the lowest values possible for and respectively?

Correct AnswerverifiedShow Answer

Correct Answer
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The wavelength of a coherent laser is 628 nm. What energy difference exists between the upper excited state involved and the lower unexcited ground state? (h = 6.63 10^-³⁴J.s, c = 3.00 10⁸ m/s, 1 eV = 1.60 *10^-¹⁹ J, and 1 nm = 10^-⁹ m)

Correct Answer
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A photon is emitted from a hydrogen atom that undergoes a transition from n = 3 to n = 2. Calculate the energy and wavelength of the photon. (The ionization energy of hydrogen is 13.6 eV, and h = 6.63 10^-³⁴J.s, c = 3.00 10⁸ m/s, 1 eV = 1.60 *10^-¹⁹ J, and 1 nm = 10^-⁹ m)

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The Paschen series of hydrogen corresponds to electron transitions from higher levels to n = 3. What is the longest wavelength in that series? (h = 6.63 * 10^-³⁴J.s. The ground state of hydrogen is at -13.6 eV.)

Correct Answer
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Which of the following transitions in hydrogen from an initial state (n_i) to a final state (n_f) results in the least energy emitted?

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