Chemistry I
Unit 2 Review
1.
How many of the following did Dalton not discuss
13.
The average mass of a boron atom is 10.81.
in his atomic theory?
Assuming you were able to isolate only one boron atom, the
isotopes
chance that you would randomly get one with a mass of
ions
10.81 is
protons
A) 0%
electrons
B) 0.81%
neutrons
C) about 11%
A) 1
D) 10.81%
B) 2
E) greater than 50%
C) 3
D) 4
15.
The atom with 67 neutrons and 50 protons has a
E) 5
mass number of
A) 67
2.
Which of the following statements are true?
B) 50
I. Models are always wrong unless they are proved by a
C) 17
theory.
D) 117
II. Elements, such as lead, are made of tiny particles that
E) cannot be determined from information given
mostly consist of open space.
.
48
III. The air you breathe is an example of a heterogeneous
16. How many neutrons are there in one atom of 22Ti ?
mixture.
A) 22
IV. Because NH3 always contains the same relative numbers
B) 26
of atoms, it will always contain 4.6 g of nitrogen for every
C) 48
1.0 g of hydrogen.
D) 70
A) II only
E) none of these
B) II, IV
C)
D)
E)
I, II, IV
I, III
All of the above statements are true.
18.
How many neutrons are contained in an iodine
nucleus with a mass number of 131?
A) 53
B) 74
C) 78
D) 127
E) 131
8.
An element's most stable ion forms an ionic
compound with chlorine having the formula XCl2. If the ion
of element X has a mass of 89 and 36 electrons, what is the
identity of the element, and how many neutrons does it
have?
A) Kr, 53 neutrons
B) Kr, 55 neutrons
C) Se, 55 neutrons
D) Sr, 51 neutrons
E) Rb, 52 neutrons
9.
20.
How many electrons are present in a tin atom with a
mass number of 119?
A) 50
B) 119
C) 169
D) 69
E) 6.02  1023
How many protons, electrons, and neutrons,
16
respectively, does O have?
A) 8, 18, 8
B) 8, 8, 8
C) 8, 10, 8
D) 8, 14, 8
E) 8, 18, 16
21.
The number of protons in
A)
B)
C)
D)
E)
11.
An atom with 15 protons and 16 neutrons is an
atom of
A) P
B) Ga
C) S
D) Pd
E) Rh
200
80
Hg is
80
120
200
dependent on ionic charge
unknown
23.
An atom that has 54 protons, 54 electrons, and 78
neutrons is
Page 1
A)
132
54
Xe
B)
132
55
Cs
C)
78
54
Xe
D)
54
78
Pt
E)
108
78
Pt
E)
24.
The number of protons in the nucleus of an atom is
called its
A) mass number
B) valence
C) isotope number
D) atomic number
E) none of these
25.
A)
B)
C)
D)
E)
34.
8
7
5
2
1
A)
B)
C)
D)
E)
1
14
6
C?
14
6
20
7
none of these
35.
We usually use the term ______________ for all
forms of electromagnetic radiation.
A) energy
B) photons
C) radiation
D) light
E) none of these
2
A)
a hydrogen, 1 H , and a deuterium, 1 H , atom
B)
C)
D)
a neutron and an electron
a proton and a neutron
an electron and a proton
How many protons are there in an atom of
238
92
36.
The form of EMR that has more energy per photon
than ultraviolet rays but less energy per photon than gamma
rays is
A) microwaves
B) radio waves
C) X rays
D) infrared rays
E) none of these
U?
nANSWER
238
146
330
Cannot tell from information given
37.
The form of EMR that has less energy per photon
than infrared rays but more energy per photon than radio
waves is
A) microwaves
B) untraviolet
C) gamma rays
D) X rays
E) none of these
29.
An atom with 45 protons has a mass number of
100. It must contain how many neutrons?
A) 145
B) 45
C) 100
D) 55
E) none of these
42.
30.
An atom with 46 protons has a mass number of
102. The atom is
A) Ba
B) Pd
C) No
D) U
E) none of these
232
91
How many protons are in the atom
Which pair have approximately the same mass?
A)
B)
C)
D)
E)
32.
12
24
25
36
variable
5
27.
Choose the pair in which the components have the
same charge.
A) a proton and a hydrogen atom
B) a hydrogen atom and an electron
C) a neutron and a hydrogen atom
D) an electron and a neutron
28.
How many protons are in the nucleus of a Mg
The number of neutrons in 3 Li is
A)
B)
C)
D)
E)
26.
33.
atom?
none of these
43.
Which of the following is a reasonable criticism of
the Bohr model of the atom?
A) It makes no attempt to explain why the
negative electron does not eventually fall into the
positive nucleus.
B) It does not adequately predict the line
spectrum of hydrogen.
How many neutrons are present in a
Pa nucleus?
A)
B)
C)
D)
The color of a polar bear's fur is
A) white
B) brown
C) black
D) yellow
E) colorless
91
141
232
323
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C) It does not adequately predict the ionization
energy of the valence electron(s) for elements other
than hydrogen.
D) It does not adequately predict the ionization
energy of the first-energy-level electrons for oneelectron species for elements other than hydrogen.
E) It shows the electrons to exist outside the
nucleus.
C)
D)
E)
53.
The maximum number of electrons allowed in the p
sublevel of the third principal level is
A) 1
B) 2
C) 3
D) 6
E) 8
45.
As the principal energy level increases in an atom's
orbitals, the average distance of an electron energy level
from the nucleus ______________.
A) increases
B) decreases
C) stays the same
D) varies
E) none of these
54.
The maximum number of electrons allowed in the
fourth energy level is
A) 2
B) 4
C) 8
D) 18
E) 32
47.
A given set of f orbitals consists of
______________ orbital(s).
A) 1
B) 3
C) 5
D) 7
E) 9
55.
Which of the following is an incorrect designation
for an atomic orbital?
A) 1s
B) 4f
C) 3s
D) 2d
E) 2p
48.
The maximum number of electrons allowed in each
of the p orbitals is
A) 2
B) 4
C) 8
D) 18
E) none of these
56.
The number of d orbitals in the second principal
energy level is
A) 2
B) 6
C) 10
D) 14
E) none of these
49.
A given set of d orbitals consists of
______________ orbital(s).
A) 1
B) 3
C) 5
D) 6
E) none of these
57.
Phosphorus has how many electrons in its
outermost principal energy level?
A) 1
B) 2
C) 3
D) 5
E) 15
50.
The maximum number of electrons allowed in each
of the d orbitals is
A) 2
B) 4
C) 8
D) 18
E) 32
51.
52.
14 electrons
32 electrons
none of these
58.
The number of unpaired electrons in a nitrogen
atom is
A) 1
B) 2
C) 3
D) 4
E) 5
The maximum electron capacity of an f sublevel is
A) 18
B) 14
C) 10
D) 6
E) 2
62.
Choose the correct electron configuration for
oxygen in an excited state.
A) 1s22s22p4
B) 1s22s22p32d1
C) 1s22s22p44s1
D) 1s22s22p34s1
E) 1s22s22p34s14p1
A d sublevel can hold a maximum of
A) 5 electrons
B) 10 electrons
Page 3
63.
The elements chlorine and iodine have similar
chemical properties because they
A) are both metals
B) are in the same chemical period
C) have the same number of electrons in their
outer energy levels
D) have the same number of stable isotopes
E) none of these
B)
C)
D)
E)
6
8
18
32
71.
Which element has the fewest electrons in its
valence shell?
A) Cs
B) Mg
C) P
D) O
E) Br
64.
The alkaline earth metals have how many valence
electrons?
A) 8
B) 7
C) 3
D) 2
E) 1
72.
65.
Which of the following is the highest energy orbital
for a silicon atom?
A) 1s
B) 2s
C) 3s
D) 3p
E) 3d
How many d electrons are there in an iron atom?
A) 2
B) 3
C) 6
D) 26
E) 56
73.
Which one of the following atoms has a partly
filled d sublevel?
A) Ca
B) Ni
C) Zn
D) As
E) Ar
66.
How many electrons are in the third principal
energy level (n = 3) of one atom of Fe?
A) 2
B) 8
C) 14
D) 18
E) none of these
74.
What is the expected ground-state electron
configuration for Te2-?
A) [Kr]5s25d105p4
B) [Kr]5s24d105p4
C) [Kr]5s24d104f145p6
D) [Kr]5s24d105p6
E) [Ar]5s24d105p2
67.
The noble gases contain how many valence
electrons?
A) 1
B) 7
C) 0
D) 8
E) none of these
75.
1s22s22p63s23p64s23d7 is the electron configuration
for which of the following atoms?
A) Ca
B) Fe
C) Cr
D) Ar
E) Co
68.
The number of electrons in the third sublevel of an
iron atom is
A) 3
B) 6
C) 8
D) 26
E) 56
69.
All these atoms have seven electrons in their
outermost energy levels except
A) H
B) F
C) Cl
D) Br
E) I
70.
The maximum number of electrons in the second
principal energy level of an atom is
A) 2
76.
The correct electron configuration for Mn is
A) 1s22s22p63s23p63d7
B) 1s22s22p63s23p64s23d6
C) 1s22s22p62d103s23p3
D) 1s22s22p63s23p64s23d5
E) none of these
77.
The electron configuration for manganese is
A) [Ar] 3d7
B) 1s22s22p63s13d6
C) [Ar] 4s23d5
D) 1s22s22p63s23d4
E) [Ar] 4s24p5
78.
Which of the following has the electron
configuration 1s22s22p63s23p64s23d5?
Page 4
A)
B)
C)
D)
E)
Cr
Ca
Mn
Br
none of these
79.
Which of the following atoms has the electron
configuration 1s22s22p63s23p64s23d1?
A) Sc
B) Ca
C) Sr
D) Ar
E) none of these
What type of orbital is represented?
A) s
B) p
C) d
D) f
80.
How many unpaired electrons does the element
cobalt (Co) have in its lowest energy state?
A) 0
B) 1
C) 2
D) 3
E) 7
85.
Consider the following representation of the one
orbital below. The points represent various electron locations.
81.
The element with the electron configuration [Kr]
5s24d105p3 is
A) As
B) Sb
C) Nb
D) Pr
E) none of these
83.
Consider the following representation of the one
orbital below. The points represent various electron locations.
Where could an electron be located in the representation
above?
A) Point A
B) Point B
C) Point C
D) Point D
E) An electron could be located at any of these
points.
86.
What element has the electron configuration
1s22s22p63s23p64s23d104p5?
A) Cl
B) Se
C) I
D) Kr
E) Br
What is the maximum number of electrons that this orbital
can hold?
A) 10
B) 6
C) 5
D) 4
E) 2
87.
What element has the electron configuration
1s22s22p63s23p3?
A) N
B) P
C) S
D) Al
E) Cl
84.
Consider the following representation of the one
orbital below. The points represent various electron locations.
88.
What element has the electron configuration
1s22s22p63s23p6?
A) Ar
B) Cl
Page 5
C)
D)
E)
Kr
S
none of these
E)
none of these
90.
What element has the electron configuration
1s22s22p63s23p64s23d104p65s24d105p66s2?
A) Ba
B) Sn
C) Pb
D) Po
E) none of these
89.
What element has the electron configuration
1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p2?
A) Ba
B) Sn
C) Pb
D) Po
Page 6