From the restrictions on the three quantum numbers that define an orbital, which set of three quantum numbers listed below is forbidden?
a. n = 3, l = 2, m l = −2
b. n = 3, l = 1, m l = +1
c. n = 3, l = 3, m l = 3
d. n = 3, l = 0, m l = 0
e. n = 3, l = 2, m l = +2
Answer: c. n = 3, l = 3, m l = 3
Of the following, ________ radiation has the shortest wavelength:
X-ray
radio
microwave
ultraviolet
infrared
Answer: X-rayAnswers
m l is known as the:
a. magnetic quantum number, and it specifies the orbital orientation
b. angular momentum quantum number, and it specifies the orbital shape
c. principal quantum number, and it specifies the average distance from the nucleus
d. angular momentum quantum number, and it specifies the orbital orientation
e. magnetic quantum number, and it specifies the average distance from the nucleus
Answers: a. magnetic quantum number, and it specifies the orbital orientation
The lowest energy shell that contains f orbitals is the shell with n = ________.
3
2
4
1
5
Answer: 4
Which one of the following is an incorrect orbital notation?
2s
3py
3f
4dxy
4s
Answer: 3f
The wavelength of light that has a frequency of 1.20 x 1013 s-1 is ________ m.
25.0
2.50 x 10-5
0.0400
12.0
2.5
Answer:
2.50 x 10-5
The n = 1 shell contains ________ p orbitals. All the other shells contain ________ p orbitals.
3, 6
0, 3
6, 2
3, 3
0, 6
Answer: 0, 3
What is the frequency (s−1) of electromagnetic radiation that has a wavelength of 5.2 m?
a. 0.19 s−1
b. s−1
c. s−1
d. s−1
e. s−1
Answer: d. s−1
When the electron in a hydrogen atom moves from n = 8 to n = 2 light with a wavelength of ________ nm is emitted.
657
93.8
411
487
389
Answer: 389
The energy of a photon that has a wavelength of 8.33 x 10-6 m is ________ J.
2.20 x 10-26
3.60 x 1013
2.39 x 10-20
2.7 x 109
4.5 x 10-25
Answer:
2.39 x 10-20
The n = 8 to n = 4 transition in the Bohr hydrogen atom occurs in the ________ region of the electromagnetic spectrum.
infrared
visible
ultraviolet
microwave
X-ray
Answers: infrared
What is the de Broglie wavelength (m) of a 25-g object moving at a speed of 5.0 m/s?
1.9 x 1032 m
5.3 x 10-33 m
6.6 x 10-36 m
3.32 x 10-36 m
3.02 x 1045 m
Answer:
5.3 x 10-33 m
he energy of a photon that has a wavelength of 9.0 m is ________ J.
2.2 x 10-26
4.5 x 1025
6.0 x 10-23
2.7 x 109
4.5 x 10-25
Answer:
2.2 x 10-26
The complete electron configuration of sulfur, element 16, is ________.
1s22s22p63s23p4
1s22s22p103s2
1s42s42p63s2
1s42s42p8
1s62s62p23s2
Answer:
1s22s22p63s23p4
A local AM radio station broadcasts at a wavelength of 349 m. Calculate the energy of the wavelength at which it is broadcasting.
a. 6.33 × 10-45 J
b. 6.93 × 10-39 J
c. 5.69 × 10-28 J
d. 7.71 × 10-40 J
e. 8.59 × 105 J
Answer: c. 5.69 × 10-28 J
The wavelength of light that has a frequency of 1.20 x 1013 s-1 is ________ m.
25.0
2.50 x 10-5
0.0400
12.0
2.5
Answer:
2.50 x 10-5
The principal quantum number for the outermost electrons in a Te atom in the ground state is ________.
3
4
5
7
6
Answer: 5
Which one of the following is considered to be ionizing radiation?
visible light
radio waves
X-rays
microwaves
infrared radiation
Answer: X-rays
How many electrons can be described by the quantum numbers n = 3, l = 3, m l = −2?
a. 2
b. 14
c. 10
d. 7
e. 0
Answers: e. 0
The energy of a photon that has a frequency of 8.21 x 1015 s-1 is ________ J.
8.08 x 10-50
1.99 x 10-25
5.44 x 10-18
1.24 x 1049
1.26 x 10-19
Answer:
5.44 x 10-18
The energy of a photon that has a frequency of 1.821 x 1016 s-1 is ________ J.
5.44 x 10-18
1.99 x 10-25
3.49 x 10-48
1.21 x 10-17
5.46 x 10-24
Answer:
1.21 x 10-17
A spectrum containing only specific wavelengths is called a(n) ________ spectrum.
line
continuous
visible
Rydberg
invariant
Answer: line
The wavelength of light that has a frequency of 1.20 x 1013 s-1 is ________ m.
25.0
2.50 x 10-5
0.0400
12.0
2.5
Answer:
2.50 x 10-5
There are ________ unpaired electrons in a ground state fluorine atom
0
1
2
3
4
Answer: 1
Which one of the following represents an acceptable set of quantum numbers for an electron in an atom? (arranged as n, l, ml, and ms)
3, 0, 0, -1/2
3, -1, -4, 1/2
3, -3, 1, -1/2
0, 2, 1, 0
3, 3, 4, 3
Answer:
3, 0, 0, -1/2
Which two elements have the same ground-state electron configuration?
Pd and Pt
Cu and Ag
Fe and Cu
Cl and Ar
No two elements have the same ground-state electron configuration.
Answer: No two elements have the same ground-state electron configuration.
How many electrons can be described by the quantum numbers n = 4, l = 1?a. 2
b. 6
c. 0
d. 18
e. 3
Answer:
b.6
here are ________ unpaired electrons in a ground state chlorine atom.
4
3
2
10
Answer: 1
The frequency of a photon that has an energy of 8.5 x 10-12 J is ________ s-1.
1.3 x 1022
1.8 x 10-16
2.5 x 10-15
5.4 x 10-8
2.5 x 1015
Answer:
1.3 x 1022
The angular momentum quantum number is 3 in ________ orbitals.
s
p
d
f
a
Answer: f
[Ne]3s23p3 is the electron configuration of a(n) ________ atom.
As
V
P
Sb
Sn
Answer:
P
What type of orbital is designated by n = 5, l = 2, m l = +1?
a. 2s
b. 5d
c. 2f
d. 5f
e. 5p
Answer:
b. 5d
All of the orbitals in a given electron shell have the same value as the ________ quantum number.
principal
angular
momentum
magnetic
spin
psi
Answer: principal
The frequency of a photon that has an energy of 3.7 x 10-18 J is ________ s-1.
5.6 x 1015
1.8 x 10-16
2.5 x 10-15
5.4 x 10-8
2.5 x 1015
Answer:
5.6 x 1015
How many electrons in an atom can have the quantum numbers n = 3, l = 2?a. 18
b. 6
c. 2
d. 5
e. 10
Answer: e. 10
Which one of the following orbitals can hold two electrons?
2px
3s
4dxy
all of the above
none of the above
Answer:
all of the above
How many electrons can be described by the quantum numbers n = 3, l = 2, m l = −2?
a. 10
b. 6
c. 0
d. 2
e. 14
Answer:
d. 2
The ________ quantum number defines the shape of an orbital.
spin
magnetic
principal
angular momentum
psi
Answer: angular momentum
There are ________ unpaired electrons in a ground state chlorine atom.
4
3
2
1
0
Answer: 1
Calculate the de Broglie wavelength of an alpha particle (mass = 6.64 x 10-27 kg) moving at a speed of 1.52 x 107 m/s.
a. 5.08 x 105 m
b. 8.68 x 10-59 m
c. 6.57 x 10-15 m
d. 1.97 x 10-6 m
e. 4.55 x 108 m
Answer:
c. 6.57 x 10-15 m
The energy of a photon that has a wavelength of 13.2 nm is ________ J.
9.55 x 10-25
1.62 x 10-17
1.99 x 10-25
4.42 x 10-23
1.51 x 10-17
Answer:
1.51 x 10-17
Calculate the energy for the transition of an electron from the n = 4 level to the n = 1 level of a hydrogen atom.
a. −2.178 × 10-18 J
b. −1.361 × 10-19 J
c. −2.042 × 10-18 J
d. −5.445 × 10-19 J
e. −3.165 × 10-19 J
Answer:
c. −2.042 × 10-18 J
According to the Heisenberg Uncertainty Principle, it is impossible to know precisely both the position and the ________ of an electron.
mass
color
momentum
shape
charge
Answer: momentum
The lowest energy shell that contains f orbitals is the shell with n = ________.
3
2
4
1
5
Answer: 4
Which one of the following is not a valid value for the magnetic quantum number of an electron in a 5d subshell?
2
3
0
1
-1
Answer: 3
The 3p subshell in the ground state of atomic xenon contains ________ electrons.
2
6
8
10
36
Answer: 6
What is the frequency (s-1) of a photon that has an energy of 4.38 x 10-18 J?
436 s-1
6.61 x 1015 s-1
1.45 x 10-16 s-1
2.30 x 107 s-1
1.31 x 10-9 s-1
Answer:
6.61 x 1015 s-1
In Bohr's atomic theory, when an electron moves from one energy level to another energy level more distant from the nucleus:
a. Energy is emitted.
b. Energy is absorbed.
c. No change in energy occurs.
d. Light is emitted.
e. none of these.
Answer:
b. Energy is absorbed
What is the wavelength of light (nm) that has a frequency 4.62 x 1014 s-1?
932 nm
649 nm
1.39 x 1023 nm
1.54 x 10-3 nm
1.07 x 106 nm
Answer:
649 nm
Which one of the following is an incorrect orbital notation?
2s
3py
3f
4dxy
4s
Answer:
3f
From the restrictions on the three quantum numbers that define an orbital, which set of three quantum numbers listed below is forbidden?
a. n = 3, l = 2, m l = −2
b. n = 3, l = 3, m l = 3
c. n = 3, l = 1, m l = +1
d. n = 3, l = 0, m l = 0
e. n = 3, l = 2, m l = +2
Answer:
b. n = 3, l = 3, m l = 3
How many sublevels are contained in the second energy level (n = 2) of a given atom?
a. 2
b. 4
c. 3
d. 1
e. 0
Answer:
a. 2
An electron cannot have the quantum numbers n = ________, l = ________, ml = ________.
6, 1, 0
3, 2, 3
3, 2, -2
1, 0, 0
3, 2, 1
Answer:
3, 2, 3
Place the following types of electromagnetic radiation in order of decreasing energy:
Ultraviolet radio waves microwaves
a. Ultraviolet > radio waves > microwaves
b. Microwaves > radio waves > ultraviolet
c. Radio waves > microwaves > ultraviolet
d. Radio waves > ultraviolet > microwaves
e. Ultraviolet > microwaves > radio waves
e. Ultraviolet > microwaves > radio waves
When n = 4, how many d orbitals are present ?
a. 10
b. 18
c. 5
d. 7
e. 2
Answer:
c. 5
There are ________ unpaired electrons in a ground state chlorine atom.
4
3
2
1
0
Answer: 1
Calculate the energy for the transition of an electron from the n = 4 level to the n = 1 level of a hydrogen atom.
a. −2.042 × 10-18 J
b. −3.165 × 10-19 J
c. −2.178 × 10-18 J
d. −1.361 × 10-19 J
e. −5.445 × 10-19 J
Answer:
a. −2.042 × 10-18 J
The uncertainty principle states that ________.
matter and energy are really the same thing
it is impossible to know anything with certainty
it is impossible to know the exact position and momentum of an electron
there can only be one uncertain digit in a reported number
it is impossible to know how many electrons there are in an atom
Answer: it is impossible to know the exact position and momentum of an electron
Which quantum numbers must be the same for the orbitals that they designate to be degenerate in a many-electron system?
n, l, and ml
n only
n, l, ml, and ms
ms only
n and l only
Answer: n and l only
What is the frequency of light (s-1) that has a wavelength of 3.12 x 10-3 cm?
3.69 s-1
2.44 x 1016 s-1
9.62 x 1012 s-1
4.10 x 10-17 s-1
1.04 x 10-13 s-1
Answer:
9.62 x 1012 s-1
The energy of a photon that has a frequency of 8.21 x 1015 s-1 is ________ J.
8.08 x 10-50
1.99 x 10-25
5.44 x 10-18
1.24 x 1049
1.26 x 10-19
Answer:
5.44 x 10-18
In a px orbital, the subscript x denotes the ________.
energy of the electron
spin of the electrons
probability of the shell
size of the orbital
axis along which the orbital is aligned
Answer:
axis along which the orbital is aligned
Of the following transitions in the Bohr hydrogen atom, the ________ transition results in the absorption of the highest-energy photon.
n = 2 → n = 5
n = 4 → n = 2
n = 3 → n = 2
n = 5 → n = 2
All transitions absorb photons of equivalent energy.
Answers:
n = 2 → n = 5
There are ________ orbitals in the second shell.
1
2
4
8
9
Answer: 4
How many f orbitals have the value n = 2?
a. 1
b. 5
c. 3
d. 7
e. 0
Answer:
e. 0
What is the wavelength of a photon that has an energy of J? ( c = 2.998 × 10 8 m/s, h = 6.626 × 10 -34 J·s)
a. 1.31912x10-1 nm
b. 6.6405070933X1034nm
c. 451 nm
d. 8.74048912x10-36 nm
Answer:
c. 451 nm
Of the following transitions in the Bohr hydrogen atom, the ________ transition results in the emission of the highest-energy photon.
n = 6 → n = 4
n = 2 → n = 7
n = 4 → n = 6
n = 1 → n = 4
All transitions emit photons of equivalent energy.
Answer:
n = 6 → n = 4
How many quantum numbers are necessary to designate a particular electron in an atom?
3
4
2
1
5
Answer: 4
How many different values of ml are possible in the 4f sublevel?
a. 3
b. 5
c. 7
d. 1
e. 2
Answer:
c. 7
Which one of the following is an incorrect subshell notation?
4f
2d
3s
2p
3d
Answer: 2d
The angular momentum quantum number (l) value of 2 indicates the ________ subshell.
d
f
s
p
0.5
Answer: d
The frequency of a photon that has an energy of 3.7 x 10-18 J is ________ s-1.
5.6 x 1015
1.8 x 10-16
2.5 x 10-15
5.4 x 10-8
2.5 x 1015
Answer:
5.6 x 1015
The largest principal quantum number in the ground state electron configuration of barium is ________.
1
2
6
4
5
Answer: 6
The 4d subshell in the ground state of atomic xenon contains ________ electrons.
2
6
8
10
36
Answer: 10
How many electrons can be described by the quantum numbers n = 3, l = 3, m l = −2?
e. 2
a. 10
b. 14
c. 0
d. 7
e. 2
Answer:
c. 0
What is the de Broglie wavelength (m) of a 25-g object moving at a speed of 5.0 m/s?
Answers:
1.9 x 1032 m
5.3 x 10-33 m
6.6 x 10-36 m
3.32 x 10-36 m
3.02 x 1045 m
Selected Answer:
5.3 x 10-33 m
The principal quantum number for the outermost electrons in a Te atom in the ground state is ________.
3
4
5
6
7
Answer: 5
The elements in the ________ period of the periodic table have a core-electron configuration that is the same as the electron configuration of neon.
first
second
third
fourth
fifth
Answer: third
Which one of the following represents an acceptable set of quantum numbers for an electron in an atom? (arranged as n, l, ml, and ms)
3, 0, 0, -1/2
3, -1, -4, 1/2
3, -3, 1, -1/2
0, 2, 1, 0
3, 3, 4, 3
Answers:
3, 0, 0, -1/2
What is the wavelength of light (nm) that has a frequency of 6.44 x 1013 s-1?
4660 nm
6490 nm
4.66 x 10-8 nm
6.49 x 10-8 nm
932 nm
Answer:
4660 nm
What is the frequency (s−1) of electromagnetic radiation that has a wavelength of 5.2 m?
a. 1.3x1034s−1
b. 5.7x107 s−1
c. 0.19 s−1
Answer:
b. 5.7x107 s−1
How many different principal quantum numbers can be found in the ground-state electron configuration of nickel?
2
3
4
5
6
Answer: 4
According to the Heisenberg Uncertainty Principle, it is impossible to know precisely both the position and the ________ of an electron.
mass
color
momentum
shape
charge
Answer: momentum
How many p-orbitals are occupied in a O atom?
5
6
0
3
1
Answer: 3
What is the energy of a photon of electromagnetic radiation with a wavelength of 117.6 nm? ( c = 2.998 × 10 8 m/s, h = 6.626 × 10 -34 J·s)
a. 2.5493197279 x10-18 J
b. 1.6991792517x10-18J
c. 7.792176x10-41 J
Answer:
b.1.6991792517x10-18J
The complete electron configuration of sulfur, element 16, is ________.
1s22s22p63s23p4
1s22s22p103s2
1s42s42p63s2
1s42s42p8
1s62s62p23s2
Answer:
1s22s22p63s23p4
Which of the following elements has a ground-state electron configuration different from the predicted one?
Cu
Ca
Xe
Cl
Ti
Answer: Cu
A ________ orbital is degenerate with a 5dz2 in a many-electron atom.
5pz
4dz2
5s
5dxy
4dzz
Answer:
5dxy
How many quantum numbers are necessary to designate a particular electron in an atom?
3
4
2
1
5
Answer: 4