Question 1

How many electron states (including spin states)  are possible in a hydrogen atom if its energy is -3.4 eV?

Accepted Answer

A)  2
B)  4
C)  6
D)  8
E)  10F) C) and D)
G) A) and B)

Question 2

An electron in an atom has the following set of quantum numbers:
n = 2, s = +1/2. -In which subshell can the electron be found? A) s B) p C) d D) f E) g" class="answers-bank-image d-inline" rel="preload" > = 1, s = +1/2. -In which subshell can the electron be found? A) s B) p C) d D) f E) g" class="answers-bank-image d-inline" rel="preload" > = -1, ms = +1/2.
-In which subshell can the electron be found?

Accepted Answer

A)  s
B)  p
C)  d
D)  f
E)  gF) B) and C)
G) None of the above

Question 3

In an X-ray tube, electrons with energy 38 keV are incident on a cobalt (Z = 27)  target. Determine the cutoff wavelength for X-ray production.

Accepted Answer

A)  1.9 × 10-11 m
B)  2.4 × 10-11 m
C)  2.8 × 10-11 m
D)  3.3 × 10-11 m
E)  3.6 × 10-11 mF) B) and C)
G) A) and E)

Question 4

Complete the following sentence: In the condition known as population inversion,

Accepted Answer

A)  the amount of one type of gas atoms is larger than that of another in a mixture.
B)  the number of energy levels that are populated is larger than that of unpopulated levels.
C)  there are more electrons occupying lower energy levels than occupying higher energy levels.
D)  there are more electrons occupying higher energy levels than occupying lower energy levels.
E)  there are more photons than electrons in a given system.F) B) and C)
G) B) and E)

Question 5

What is the longest wavelength in the Paschen series of atomic spectra?

Accepted Answer

A)  8.204 × 10-7 m
B)  1.875 × 10-6 m
C)  2.216 × 10-6 m
D)  5.522 × 10-6 m
E)  6.756 × 10-5 mF) None of the above
G) A) and B)

Question 6

A pulsed laser has an average output power of 4.0 W. Each pulse consists of light at wavelength 5.0 × 10-7 m and has a 25 ms duration. How many photons are emitted in a single pulse?

Accepted Answer

A)  1.0 × 1017
B)  2.5 × 1017
C)  3.7 × 1017
D)  5.0 × 1017
E)  7.4 × 1017F) A) and B)
G) A) and D)

Question 7

The figure shows an energy level diagram for the hydrogen atom. Several transitions are shown and are labeled by letters.  Note: The diagram is not drawn to scale.
-Determine the wavelength of the radiation involved in transition B.

Accepted Answer

A)  291 nm
B)  364 nm
C)  487 nm
D)  652 nm
E)  1910 nmF) A) and B)
G) A) and C)

Question 8

Complete the following statement: An individual copper atom emits electromagnetic radiation with wavelengths that are

Accepted Answer

A)  evenly spaced across the spectrum.
B)  unique to that particular copper atom.
C)  the same as other elements in the same column of the periodic table.
D)  unique to all copper atoms.
E)  the same as those of all elements.F) C) and D)
G) A) and C)

Question 9

Which one of the following electronic configurations corresponds to an atomic ground state?

Accepted Answer

A)  1s2 2s1 2p6
B)  1s1 2s1 2p1
C)  1s1 2s2 3p1
D)  1s2 2s2 2p1
E)  1s1 2s2 2p1F) B) and C)
G) C) and D)

Question 10

Determine the maximum wavelength of incident radiation that can be used to remove the remaining electron from a singly ionized helium atom He+ (Z = 2) . Assume the electron is in its ground state.

Accepted Answer

A)  6.2 nm
B)  12.4 nm
C)  22.8 nm
D)  45.6 nm
E)  54.4 nmF) A) and E)
G) A) and D) C

Question 11

Complete the following statement: An h subshell refers to orbital quantum number

Accepted Answer

A)    = 1.
B)    = 2.
C)    = 3.
D)    = 4.
E)    = 5.F) A) and B)
G) A) and C) E

Question 12

Which model of atomic structure was developed to explain the results of the experiment shown?

Accepted Answer

A)  Bohr model
B)  quantum mechanical atom
C)  billiard ball atom
D)  plum-pudding model
E)  nuclear atomF) A) and D)
G) B) and D)

Question 13

An atom will emit photons when one of its electrons goes from

Accepted Answer

A)  the K shell to the L shell.
B)  the M shell to the N shell.
C)  the K shell to the M shell.
D)  the N shell to the L shell.
E)  the K shell to the N shell.F) A) and B)
G) B) and C)

Question 14

The figure shows an energy level diagram for the hydrogen atom. Several transitions are shown and are labeled by letters.  Note: The diagram is not drawn to scale.
-In which transition is a Balmer series photon absorbed?

Accepted Answer

A)  A
B)  B
C)  C
D)  D
E)  EF) A) and B)
G) A) and C)

Question 15

The ground state electronic configuration of a neon atom is 1s2 2s2 2p6. How many of these electrons have magnetic quantum number ml = 0?

Accepted Answer

A)  2
B)  4
C)  6
D)  8
E)  10F) C) and D)
G) A) and B) C

Question 16

Determine the kinetic energy of an electron that has a de Broglie wavelength equal to twice the diameter of the hydrogen atom. Assume that the hydrogen atom is a sphere of radius 5.3 × 10-11 m.

Accepted Answer

A)  13.6 eV
B)  27.2 eV
C)  33.6 eV
D)  48.9 eV
E)  65.2 eVF) C) and D)
G) A) and B)

Question 17

Use the Bohr model to estimate the K α\alphaα X-ray wavelength for a gold atom (Z = 79) .

Accepted Answer

A)  5.13 × 10-10 m
B)  8.54 × 10-10 m
C)  2.00 × 10-11 m
D)  3.60 × 10-11 m
E)  2.47 × 10-13 m F) B) and D)
G) C) and E)

Question 18

Why was it necessary for Bohr to require that electrons remain in stationary orbits?

Accepted Answer

A)  An electron must travel in a circular path.
B)  It was required by the Heisenberg uncertainty principle.
C)  No two electrons can be in the same region in the atom.
D)  It was required by the Pauli exclusion principle.
E)  Classical physics predicts that the electron should spiral into the nucleus.F) A) and C)
G) A) and B)

Question 19

What is the shortest possible wavelength in the Lyman series for atomic hydrogen?

Accepted Answer

A)  91.3 nm
B)  104 nm
C)  122 nm
D)  364 nm
E)  820 nmF) A) and B)
G) D) and E)

Question 20

In the planetary model of the atom where electrons orbit a centralized nucleus, what is the approximate ratio of the radius of the nucleus to that of the electron orbits, rn/re?

Accepted Answer

A)  105
B)  10-3
C)  103
D)  10-5
E)  10-7F) A) and C)
G) B) and C)

Exam 30: The Nature of the Atom

How many electron states (including spin states) are possible in a hydrogen atom if its energy is -3.4 eV?

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An electron in an atom has the following set of quantum numbers: n = 2, = 1, = -1, ms = +1/2. -In which subshell can the electron be found?

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In an X-ray tube, electrons with energy 38 keV are incident on a cobalt (Z = 27) target. Determine the cutoff wavelength for X-ray production.

Correct AnswerverifiedShow Answer

Complete the following sentence: In the condition known as population inversion,

Correct AnswerverifiedShow Answer

What is the longest wavelength in the Paschen series of atomic spectra?

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A pulsed laser has an average output power of 4.0 W. Each pulse consists of light at wavelength 5.0 × 10-7 m and has a 25 ms duration. How many photons are emitted in a single pulse?

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The figure shows an energy level diagram for the hydrogen atom. Several transitions are shown and are labeled by letters. Note: The diagram is not drawn to scale. -Determine the wavelength of the radiation involved in transition B.

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Complete the following statement: An individual copper atom emits electromagnetic radiation with wavelengths that are

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Which one of the following electronic configurations corresponds to an atomic ground state?

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Determine the maximum wavelength of incident radiation that can be used to remove the remaining electron from a singly ionized helium atom He+ (Z = 2) . Assume the electron is in its ground state.

Correct AnswerverifiedC

Complete the following statement: An h subshell refers to orbital quantum number

Correct AnswerverifiedE

Which model of atomic structure was developed to explain the results of the experiment shown?

Correct AnswerverifiedShow Answer

An atom will emit photons when one of its electrons goes from

Correct AnswerverifiedShow Answer

The figure shows an energy level diagram for the hydrogen atom. Several transitions are shown and are labeled by letters. Note: The diagram is not drawn to scale. -In which transition is a Balmer series photon absorbed?

Correct AnswerverifiedShow Answer

The ground state electronic configuration of a neon atom is 1s2 2s2 2p6. How many of these electrons have magnetic quantum number ml = 0?

Correct AnswerverifiedC

Determine the kinetic energy of an electron that has a de Broglie wavelength equal to twice the diameter of the hydrogen atom. Assume that the hydrogen atom is a sphere of radius 5.3 × 10-11 m.

Correct AnswerverifiedShow Answer

Use the Bohr model to estimate the K α\alphaα X-ray wavelength for a gold atom (Z = 79) .

Correct AnswerverifiedShow Answer

Why was it necessary for Bohr to require that electrons remain in stationary orbits?

Correct AnswerverifiedShow Answer

What is the shortest possible wavelength in the Lyman series for atomic hydrogen?

Correct AnswerverifiedShow Answer

In the planetary model of the atom where electrons orbit a centralized nucleus, what is the approximate ratio of the radius of the nucleus to that of the electron orbits, rn/re?

Correct AnswerverifiedShow Answer

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An electron in an atom has the following set of quantum numbers: n = 2, = 1, = -1, m_s = +1/2. -In which subshell can the electron be found?

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A pulsed laser has an average output power of 4.0 W. Each pulse consists of light at wavelength 5.0 × 10^-⁷ m and has a 25 ms duration. How many photons are emitted in a single pulse?

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Determine the maximum wavelength of incident radiation that can be used to remove the remaining electron from a singly ionized helium atom He⁺ (Z = 2) . Assume the electron is in its ground state.

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C

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E

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The ground state electronic configuration of a neon atom is 1s²2s²2p⁶. How many of these electrons have magnetic quantum number m_l = 0?

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C

Determine the kinetic energy of an electron that has a de Broglie wavelength equal to twice the diameter of the hydrogen atom. Assume that the hydrogen atom is a sphere of radius 5.3 × 10^-¹¹ m.

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Use the Bohr model to estimate the K_$\alpha$X-ray wavelength for a gold atom (Z = 79) .

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In the planetary model of the atom where electrons orbit a centralized nucleus, what is the approximate ratio of the radius of the nucleus to that of the electron orbits, r_n/r_e?

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