Question 1

Using quantum theories to study the hydrogen atom allows the prediction and experimental verification of many data about atoms such as He+ and Li2+.Some quantities that can successfully be predicted about He+ and Li2+ in this manner are:

Accepted Answer

A)  the color of the light they will emit.
B)  their mass.
C)  their abundance in nature.
D)  All of the above.E) A) and D)
F) None of the above

Question 2

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

Accepted Answer

A)  3
B)  5
C)  10
D)  25E) B) and D)
F) None of the above

Question 3

Which of the following demonstrated the relation between the atomic number of a given element and the wavelength of the K-alpha x-ray photon emitted by that element?

Accepted Answer

A)  Bohr
B)  Compton
C)  Moseley
D)  PauliE) A) and B)
F) A) and D)

Question 4

The Paschen series of hydrogen corresponds to electron transitions from higher levels to n = 3.What is the shortest wavelength in that series? (R = 1.097 x 107 m-1 and 1 nm = 10-9 m)

Accepted Answer

A)  365 nm
B)  820 nm
C)  1 094 nm
D)  313 nmE) A) and B)
F) A) and D)

Question 5

The visible lines from hydrogen are all members of the:

Accepted Answer

A)  Lyman series.
B)  Balmer series.
C)  Paschen series.
D)  Brackett series.E) C) and D)
F) B) and C)

Question 6

When a hydrogen atom absorbs a photon that raises it to the n = 4 state,what is the greatest number of photons that can be emitted by that atom as it returns to the ground state?

Accepted Answer

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

Question 7

The quantum mechanical model of the hydrogen atom suggests a visual picture of the electron as which of the following?

Accepted Answer

A)  raisin in pudding
B)  probability cloud
C)  planetary orbiting body
D)  light quantumE) A) and C)
F) B) and C)

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)  de Broglie
C)  Heisenberg
D)  PauliE) A) and B)
F) A) and C)

Question 9

When a cool gas is placed between a glowing wire filament source and a diffraction grating,the resultant spectrum from the grating is which one of the following?

Accepted Answer

A)  line emission
B)  line absorption
C)  continuous
D)  monochromaticE) B) and C)
F) A) and D)

Question 10

When an electron moves from the n = 1 to the n = 2 orbit:

Accepted Answer

A)  both the radius and the angular momentum double.
B)  both the radius and the angular momentum increase by a factor of 4.
C)  the radius doubles and the angular momentum increases by a factor of 4.
D)  the radius increases by a factor of 4,and the angular momentum doubles.E) A) and B)
F) A) and C)

Question 11

If the principal quantum number for hydrogen is 5,which one of the following is not a permitted orbital magnetic quantum number for that atom?

Accepted Answer

A)  6
B)  -2
C)  0
D)  3E) B) and C)
F) A) and C)

Question 12

What is the wavelength of the line in the Balmer series of hydrogen that is comprised of transitions from the n = 4 to the n = 2 level? (R = 1.097 x 107 m-1 and 1 nm = 10-9 m)

Accepted Answer

A)  380 nm
B)  486 nm
C)  523 nm
D)  630 nmE) B) and C)
F) All of the above

Question 13

The wavelength of coherent ruby laser light is 688.3 nm.What energy difference exists between the upper excited state involved and the lower unexcited ground state? (h = 6.63 x 10-34 J*s,c = 3.00 x 108 m/s,1 eV = 1.60 x 10-19 J,and 1 nm = 10-9 m)

Accepted Answer

A)  1.75 eV
B)  1.81 eV
C)  1.86 eV
D)  1.94 eVE) A) and D)
F) A) and C)

Question 14

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

Accepted Answer

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

Question 15

A hydrogen atom in the ground state absorbs a 12.75-eV photon.To what level is the electron promoted? (The ionization energy of hydrogen is 13.6-eV) .

Accepted Answer

A)  n = 2
B)  n = 3
C)  n = 4
D)  n = 5E) C) and D)
F) B) and D)

Question 16

How many electrons are in bromine's (atomic number 35) next to outer shell (n = 3) ?

Accepted Answer

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

Question 17

What is the energy needed to change an He+ ion into an He++ ion? (The ionization energy of hydrogen is 13.6 eV) .

Accepted Answer

A)  13.6 eV
B)  54.4 eV
C)  92.9 eV
D)  112.4 eVE) C) and D)
F) B) and D)

Question 18

Characteristic x-rays are the result of:

Accepted Answer

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

Question 19

When a high voltage is applied to a low-pressure gas causing it to glow,it will emit which type of spectrum?

Accepted Answer

A)  line emission
B)  line absorption
C)  continuous
D)  monochromaticE) B) and D)
F) C) and D)

Question 20

If a hydrogen atom,originally in its ground state of energy -13.6 eV,absorbs a photon of energy 15.0 eV,what is the resulting kinetic energy of the electron if the proton has negligible kinetic energy?

Accepted Answer

A)  Such a photon cannot be absorbed in this case.
B)  -1.4 eV
C)  1.4 eV
D)  15.0 eVE) All of the above
F) A) and B)

Exam 28: Atomic Physics

Using quantum theories to study the hydrogen atom allows the prediction and experimental verification of many data about atoms such as He+ and Li2+.Some quantities that can successfully be predicted about He+ and Li2+ in this manner are:

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

When an electron moves from the n = 1 to the n = 2 orbit:

Correct AnswerverifiedShow Answer

The quantum mechanical model of the hydrogen atom suggests a visual picture of the electron as which of the following?

Correct AnswerverifiedShow Answer

When a hydrogen atom absorbs a photon that raises it to the n = 4 state,what is the greatest number of photons that can be emitted by that atom as it returns to the ground state?

Correct AnswerverifiedShow Answer

The Paschen series of hydrogen corresponds to electron transitions from higher levels to n = 3.What is the shortest wavelength in that series? (R = 1.097 x 107 m-1 and 1 nm = 10-9 m)

Correct AnswerverifiedShow Answer

When a high voltage is applied to a low-pressure gas causing it to glow,it will emit which type of spectrum?

Correct AnswerverifiedShow Answer

The wavelength of coherent ruby laser light is 688.3 nm.What energy difference exists between the upper excited state involved and the lower unexcited ground state? (h = 6.63 x 10-34 J*s,c = 3.00 x 108 m/s,1 eV = 1.60 x 10-19 J,and 1 nm = 10-9 m)

Correct AnswerverifiedShow Answer

When a cool gas is placed between a glowing wire filament source and a diffraction grating,the resultant spectrum from the grating is which one of the following?

Correct AnswerverifiedShow Answer

The visible lines from hydrogen are all members of the:

Correct AnswerverifiedShow Answer

How many electrons are in bromine's (atomic number 35) next to outer shell (n = 3) ?

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

Characteristic x-rays are the result of:

Correct AnswerverifiedShow Answer

A hydrogen atom in the ground state absorbs a 12.75-eV photon.To what level is the electron promoted? (The ionization energy of hydrogen is 13.6-eV) .

Correct AnswerverifiedShow Answer

If the principal quantum number for hydrogen is 5,which one of the following is not a permitted orbital magnetic quantum number for that atom?

Correct AnswerverifiedShow Answer

If a hydrogen atom,originally in its ground state of energy -13.6 eV,absorbs a photon of energy 15.0 eV,what is the resulting kinetic energy of the electron if the proton has negligible kinetic energy?

Correct AnswerverifiedShow Answer

Which of the following demonstrated the relation between the atomic number of a given element and the wavelength of the K-alpha x-ray photon emitted by that element?

Correct AnswerverifiedShow Answer

What is the wavelength of the line in the Balmer series of hydrogen that is comprised of transitions from the n = 4 to the n = 2 level? (R = 1.097 x 107 m-1 and 1 nm = 10-9 m)

Correct AnswerverifiedShow Answer

What is the energy needed to change an He+ ion into an He++ ion? (The ionization energy of hydrogen is 13.6 eV) .

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Using quantum theories to study the hydrogen atom allows the prediction and experimental verification of many data about atoms such as He⁺ and Li²⁺.Some quantities that can successfully be predicted about He⁺ and Li²⁺ in this manner are:

Correct Answer
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The Paschen series of hydrogen corresponds to electron transitions from higher levels to n = 3.What is the shortest wavelength in that series? (R = 1.097 x 10⁷ m^-1 and 1 nm = 10^-9 m)

Correct Answer
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Correct Answer
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The wavelength of coherent ruby laser light is 688.3 nm.What energy difference exists between the upper excited state involved and the lower unexcited ground state? (h = 6.63 x 10^-34J*s,c = 3.00 x 10⁸ m/s,1 eV = 1.60 x 10^-19 J,and 1 nm = 10^-9 m)

Correct Answer
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What is the wavelength of the line in the Balmer series of hydrogen that is comprised of transitions from the n = 4 to the n = 2 level? (R = 1.097 x 10⁷ m^-1 and 1 nm = 10^-9 m)

Correct Answer
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What is the energy needed to change an He⁺ ion into an He⁺⁺ ion? (The ionization energy of hydrogen is 13.6 eV) .

Correct Answer
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