Quiz 41: Atomic Physics
Physics & Astronomy
Q 1Q 1
Consider the four quantum numbers of an electron in an atom, n, l, ml, and ms. The energy of an electron in an isolated atom depends on
A) n only.
B) n and l only.
C) n, l, and ml only.
D) l, ml, and ms only.
E) all four quantum numbers.
Free
Multiple Choice
A
Q 2Q 2
For each value of the principal quantum number n, what are the possible values of the electron spin quantum number ms? (There may be more than one correct choice.)
A) 0
B) +1/2
C) -1/2
D) +3/2
E) -3/2
Free
Multiple Choice
B, C
Q 3Q 3
Which of the following are characteristics of laser light? (There may be more than one correct choice.)
A) It is coherent.
B) It is produced by an inverted population of atoms.
C) It contains a full spectrum of wavelengths.
Free
Multiple Choice
A, B
Q 4Q 4
An electron in a hydrogen atom is in the n = 7 shell. How many possible values of the orbital quantum number l could it have?
A) 6
B) 7
C) 15
D) 33
E) 98
Free
Multiple Choice
Q 5Q 5
An electron in a hydrogen atom has orbital quantum number l = 7. How many possible values of the magnetic quantum number ml could it have?
A) 6
B) 7
C) 15
D) 33
E) 98
Free
Multiple Choice
Q 6Q 6
An electron in a hydrogen atom has principal quantum number n = 4. How many possible values of the orbital quantum number l could it have?
A) 8
B) 9
C) 3
D) 4
E) 10
Free
Multiple Choice
Q 7Q 7
An electron in a hydrogen atom has orbital quantum number l = 4. How many possible values of the magnetic quantum number ml could it have?
A) 4
B) 10
C) 5
D) 9
E) 3
Free
Multiple Choice
Q 8Q 8
If the orbital quantum number is l = 4, which one of the following is a possible value for the principal quantum number n?
A) 1
B) 2
C) 3
D) 4
E) 8
Free
Multiple Choice
Q 9Q 9
If the principal quantum number of an electron is n = 5, which one of the following is NOT an allowed magnetic quantum number ml for the electron?
A) 0
B) 2
C) 3
D) 4
E) 5
Free
Multiple Choice
Q 10Q 10
If an electron has spin quantum number ms = - what is the possible value for the orbital quantum number l of the electron?
A) 0
B) 1
C) 2
D) 11
E) All of the above numbers are possible.
Free
Multiple Choice
Q 11Q 11
In the ground state, the quantum numbers (n, l, ml, ms) for hydrogen are, respectively
A) 1, 1, 1, 1
B) 1, 0, 0, 0
C) 1, 0, 0, ±
D) 1, 1, 1, ±
E) 1, 1, 0, ±
Free
Multiple Choice
Q 12Q 12
The binding energy of the hydrogen atom in its ground state is -13.6 eV. What is the energy when it is in the n = 5 state?
A) 2.72 eV
B) -2.72 eV
C) 0.544 eV
D) -0.544 eV
E) -68 eV
Free
Multiple Choice
Q 13Q 13
What is the energy of an incident photon that is just enough to excite a hydrogen atom from its ground state to its n = 4 state?
A) 12.75 eV
B) 10.20 eV
C) 3.40 eV
D) 0.85 eV
Free
Multiple Choice
Q 14Q 14
How fast must a hydrogen atom be traveling for its kinetic energy to be just enough to excite the ground-state atom to its first excited state in a collision? (1 eV = 1.60 × 10-19 J, mh ≈ mproton =
1.67 × 10-27 kg)
A) 44.2 km/s
B) 21.7 km/s
C) 66.5 km/s
D) 113 km/s
E) 51.0 km/s
Free
Multiple Choice
Q 15Q 15
What is the minimum speed needed by a ground-state hydrogen atom for its kinetic energy to be enough to ionize the atom in a collision? (1 eV = 1.60 × 10-19 J, mh ≈ mproton = 1.67 × 10-27 kg)
A) 44.2 km/s
B) 21.7 km/s
C) 66.5 km/s
D) 113 km/s
E) 51.0 km/s
Free
Multiple Choice
Q 16Q 16
The normalized wave function for a hydrogen atom in the 1s state is given by ψ(r) = e-r/α0 where α0 is the Bohr radius, which is equal to 5.29 × 10-11 m. What is the probability of finding the electron at a distance greater than 7.8 α0 from the proton?
A) 2.3 × 10-5
B) 1.2 × 10-5
C) 1.7 × 10-5
D) 4.6 × 10-5
E) 3.5 × 10-5
Free
Multiple Choice
Q 17Q 17
What is the greatest magnitude of the orbital angular momentum L for an electron in a state with principal quantum number n = 5?
A) 4.47
B) 4.90
C) 5
D) 5.48
Free
Multiple Choice
Q 18Q 18
The magnitude of the orbital angular momentum L of an electron in a certain atom is equal to 3.464ħ. What is the orbital quantum number l of the electron?
A) 1
B) 2
C) 3
D) 4
E) 5
Free
Multiple Choice
Q 19Q 19
The magnitude of the orbital angular momentum L of an electron in a certain atom is equal to 3.464ħ. Which one of the following numbers could be the principal quantum number n of the electron?
A) 0
B) 1
C) 2
D) 3
E) 4
Free
Multiple Choice
Q 20Q 20
The magnitude of the orbital angular momentum L of an electron in a certain atom is equal to 3.464ħ. Which of the following angles could NOT be the angle between the orbital angular momentum vector of the electron and an arbitrary z-direction?
A) 107°
B) 90.0°
C) 73.2°
D) 54.7°
E) 0.00°
Free
Multiple Choice
Q 21Q 21
How many electrons can be found with principal quantum number n = 3 in a suitably heavy atom?
A) 18
B) 6
C) 20
D) 9
Free
Multiple Choice
Q 22Q 22
An atom has completely filled inner shells and a single valence electron in an excited p state. The filled inner shells have an orbital momentum equal to zero. What is the magnitude of the orbital angular momentum L of the atom?
A) 1.0ħ
B) 1.2ħ
C) 1.4ħ
D) 1.7ħ
E) 2.0ħ
Free
Multiple Choice
Q 23Q 23
An atom has completely filled inner shells and a single valence electron in an excited p state. The filled inner shells have an orbital momentum equal to zero. A magnetic field is applied, defining the z-axis along the field. Which of the following sets of angles are possible angles between the magnetic field and the orbital angular momentum?
A) 45°
B) 90°
C) 45°, 90°
D) 45°, 135°
E) 45°, 90°, 135°
Free
Multiple Choice
Q 24Q 24
The only VALID electron state and shell designation among the following is
A) 1p, K.
B) 2s, K.
C) 1s, L.
D) 2p, L.
E) 3f, M.
Free
Multiple Choice
Q 25Q 25
The only INVALID electron state and shell designation among the following is
A) 1s, K.
B) 2s, L.
C) 2d, L.
D) 3s, M.
E) 3d, M.
Free
Multiple Choice
Q 26Q 26
The correct ground state electron configuration of boron, which has 5 electrons, is
A) 1s22s22p.
B) 1s22s22p3.
C) 1s21p22s.
D) 1s22p23s.
E) 1s22p3.
Free
Multiple Choice
Q 27Q 27
Consider the n = 9 shell.
(a) What is the largest value of the orbital quantum number, l, in this shell?
(b) How many electrons can be placed in this shell?
Free
Essay
Q 28Q 28
An atom with 5 electrons is in its ground state. How many electrons are in its outermost shell?
Free
Short Answer
Free
Multiple Choice
Q 30Q 30
How many possible sets of quantum numbers (electron states) are there in the 5f subshell?
A) 2
B) 6
C) 8
D) 10
E) 14
Free
Multiple Choice
Q 31Q 31
A neutral atom has an electron configuration of 1s22s22p63s23p2. How many protons does it have in its nucleus?
A) 5
B) 11
C) 14
D) 20
E) 26
Free
Multiple Choice
Q 32Q 32
What is the electron configuration for ground state Li, which has 3 electrons?
A) 1s3
B) 1s12s2
C) 1s22s1
D) 1s21p1
E) 1s11p2
Free
Multiple Choice
Q 33Q 33
What is the correct electronic configuration for ground state carbon, which has 6 electrons?
A) 1s22s22p2
B) 1s12p1
C) 1s12s22p1
D) 1s12s12p1
E) 1s22s22p4
Free
Multiple Choice
Q 34Q 34
What is the correct electronic configuration for the ground state sodium atom, which has 11 electrons?
A) 1s12s23p62s2
B) 1s22s13p62s2
C) 1s12s22p6
D) 1s22s22p63s2
E) 1s22s22p63s1
Free
Multiple Choice
Q 35Q 35
A collection of atoms has 20% of the sample in a state 5.9 eV above the ground state. If these emit coherent radiation, what is the wavelength of the laser light produced? (c = 3.00 × 108 m/s,
H = 6.626 × 10-34 J ∙ s, 1 eV = 1.60 × 10-19 J)
A) 210 nm
B) 91 nm
C) 340 nm
D) 34 nm
Free
Multiple Choice
Q 36Q 36
How many photons per second emerge from a laser of power 2.00 mW with wavelength 605 nm?
(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ∙ s)
A) 6.09 × 1015 photons/s
B) 5.03 × 1012 photons/s
C) 3.07 × 1015 photons/s
D) 3.07 × 1013 photons/s
Free
Multiple Choice
Q 37Q 37
You need 14 W of infrared laser light power with wavelength 1270 nm to bore a hole in a diamond. How many downward atomic transitions per second must occur in the laser if all of them result in light directed onto the diamond? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ∙ s)
A) 8.9 × 1019
B) 8.9 × 1018
C) 5.9 × 1019
D) 2.7 × 1018
Free
Multiple Choice
Q 38Q 38
The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states involved in laser action? (c = 2.9979 × 108 m/s, h = 6.626 × 10-34 J ∙ s, 1 eV = 1.6022 × 10-19 J)
A) 1.537 eV
B) 1.646 eV
C) 1.786 eV
D) 1.812 eV
E) 3.572 eV
Free
Multiple Choice
Q 39Q 39
In a ruby laser, an electron jumps from a higher energy level to a lower one. If the energy difference between the two levels is 1.8 eV, what is the wavelength of the emitted photon?
(c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ∙ s, 1 eV = 1.60 × 10-19 J)
A) 350 nm
B) 470 nm
C) 650 nm
D) 690 nm
E) 960 nm
Free
Multiple Choice