# Quiz 41: Atomic Physics

Physics & Astronomy

Q 1Q 1

Consider the four quantum numbers of an electron in an atom, n, l, m

_{l}, and m_{s}. The energy of an electron in an isolated atom depends on A) n only. B) n and l only. C) n, l, and m_{l}only. D) l, m_{l}, and m_{s}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 m

_{s}? (There may be more than one correct choice.) A) 0 B) +1/2 C) -1/2 D) +3/2 E) -3/2Free

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 m

_{l}could it have? A) 6 B) 7 C) 15 D) 33 E) 98Free

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 m

_{l}could it have? A) 4 B) 10 C) 5 D) 9 E) 3Free

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 m

_{l}for the electron? A) 0 B) 2 C) 3 D) 4 E) 5Free

Multiple Choice

Q 10Q 10

If an electron has spin quantum number m

_{s}= - 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, m

_{l}, m_{s}) 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, m_{h}≈ m_{proton}= 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/sFree

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, m_{h}≈ m_{proton}= 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/sFree

Multiple Choice

Q 16Q 16

The normalized wave function for a hydrogen atom in the 1s state is given by ψ(r) = e

^{-}^{r/α}_{0}where α_{0 }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 α_{0}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) 1s

^{2}2s^{2}2p. B) 1s^{2}2s^{2}2p^{3}. C) 1s^{2}1p^{2}2s. D) 1s^{2}2p^{2}3s. E) 1s^{2}2p^{3}.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 1s

^{2}2s^{2}2p^{6}3s^{2}3p^{2}. How many protons does it have in its nucleus? A) 5 B) 11 C) 14 D) 20 E) 26Free

Multiple Choice

Q 32Q 32

What is the electron configuration for ground state Li, which has 3 electrons?
A) 1s

^{3}B) 1s^{1}2s^{2}C) 1s^{2}2s^{1}D) 1s^{2}1p^{1}E) 1s^{1}1p^{2}Free

Multiple Choice

Q 33Q 33

What is the correct electronic configuration for ground state carbon, which has 6 electrons?
A) 1s

^{2}2s^{2}2p^{2}B) 1s^{1}2p^{1}C) 1s^{1}2s^{2}2p^{1}D) 1s^{1}2s^{1}2p^{1}E) 1s^{2}2s^{2}2p^{4}Free

Multiple Choice

Q 34Q 34

What is the correct electronic configuration for the ground state sodium atom, which has 11 electrons?
A) 1s

^{1}2s^{2}3p^{6}2s^{2}B) 1s^{2}2s^{1}3p^{6}2s^{2}C) 1s^{1}2s^{2}2p^{6}D) 1s^{2}2s^{2}2p^{6}3s^{2}E) 1s^{2}2s^{2}2p^{6}3s^{1}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 × 10

^{8}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 nmFree

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 × 10

^{8}m/s, h = 6.626 × 10^{-34}J ∙ s) A) 6.09 × 10^{15}photons/s B) 5.03 × 10^{12}photons/s C) 3.07 × 10^{15}photons/s D) 3.07 × 10^{13}photons/sFree

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 × 10

^{8}m/s, h = 6.626 × 10^{-34}J ∙ s) A) 8.9 × 10^{19}B) 8.9 × 10^{18}C) 5.9 × 10^{19}D) 2.7 × 10^{18}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 × 10

^{8}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 eVFree

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 × 10

^{8}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 nmFree

Multiple Choice