The atomic radius of an atom that is chemically bonded to an identical atom is equal to

half the distance between the nuclei.

The branch of chemistry called analytical chemistry most likely would be used in determining the

chemical composition of a new substance.

Quantum numbers are sets of numbers that

specify properties of electrons.

Which of the following changes is a chemical change of matter?

vinegar combining with baking soda to produce carbon dioxide

An object’s weight is a measure of

the force with which it is attracted by gravity.

In general, which properties are common to elements within a single group on the periodic table?

chemical properties and ability to bond to other atoms

Separating unpaired electrons into as many orbitals as possible

minimizes the repulsion between electrons.

Which statement best describes an element?

a pure substance made up of only one kind of atom

The outer-level electron configuration of a neutral alkaline-earth metal atom consists of

two electrons in the s orbital.

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Chem Exam study guide 2

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1
Which mathematically describes the wave properties of electrons?
the Bohr model of the atom
quantum theory
the Rutherford model of the atom
atomic theory
2
Mendeleev’s periodic table grouped together elements with similar...
names
atomic numbers.
properties
isotopes.
3
In nature the alkali metals are found only in compounds because they
are rare elements.
have small atoms.
are very reactive elements.
each have a stable octet.
4
What is the maximum number of electrons that a single orbital can hold?
3
2
4
1
5
Which is an example of a nonmetal?
phosphorus
copper
cadmium
mercury
6
An element near argon in the periodic table would probably be
shiny and malleable.
solid at room temperature.
a poor heat conductor.
a good electrical conductor.
7
Which noble gas has the greatest atomic number?
Rn
Ar
Xe
Kr
8
Which of the following is an intensive property of matter?
mass
volume
density
energy content
9
According to the Aufbau principle, which of the following sublevels is lowest in energy?
3d
5s
4p
4s
10
Read the image
the hypothesis.
a variable.
the control.
a model.
11
What is the total number of orbitals in the fourth main energy level?
9
1
16
4
12
The atomic radius of an atom that is chemically bonded to an identical atom is equal to
twice the distance between the nuclei.
half the distance between the nuclei.
one-fourth the distance between the nuclei.
the distance between the nuclei.
13
An element that has the electron configuration [Ne]3s^2 3p^5 is in Group
7
5
2
17
14
A scientist is working to improve a product that uses fiber optics. This is an example of
technological development.
Both (a) and (c).
applied research.
basic research.
15
Masses of 0.12 g, 1.8 g, and 0.562 g are mixed together. Expressed to the correct number of significant figures
2.5g
2.482 g.
2.4 g.
2.48 g.
16
The branch of chemistry called analytical chemistry most likely would be used in determining the
uses of a particular metal.
chemical composition of a new substance.
effect of a chemical compound on living things.
economic effects of a new substance.
17
A scientist is working in the lab, with compounds containing carbon. She is most likely working in the field of
None of the above.
theoretical chemistry.
organic chemistry.
inorganic chemistry.
18
The horizontal rows of the periodic table are called
columns
families.
periods
groups
19
An element found in groups 3–12 of the periodic table is classified as a(n)
alkali metal.
alloy
transition metal.
actinide
20
What is the correct notation for a sublevel within the first energy level?
1f
1p
1d
1s
21
On most periodic tables, the lanthanides and actinides appear
on a separate page.
at the top.
on the back.
below the main portion.
22
Which of the following is an example of a heterogeneous mixture?
chunky peanut butter
gold ring
tap water
orange-colored sugar water
23
The periodic law states that the physical and chemical properties of elements are periodic functions of their atomic
radii.
masses
numbers
structures
24
The density of aluminum is 2.70 g/cm3. What is the mass of a solid piece of aluminum with a volume of 1.50 cm3?
4.20 g
1.80 g
0.556 g
4.05 g
25
The number of significant figures in the measurement 2010 cm is
2
1
3
4
26
How many electrons are present in an atom of calcium that has the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2?
6
36
16
20
27
Which is a wave property that electrons possess?
radiation
emission
diffraction
absorption
28
The density of pure diamond is 3.5 g/cm3. What is the volume of a diamond with a mass of 0.25 g?
0.875 cm3
14 cm3
3.75 cm3
0.071 cm3
29
Down a group in the periodic table, atomic radii generally
vary unpredictably.
remain constant.
increase.
decrease
30
The unit cm3 is used to express
mass
volume
length
time
31
One of the least electronegative elements would be found on the periodic table in
Group 17, Period 2.
Group 3, Period 4.
Group 5, Period 3.
Group 1, Period 7.
32
How many different orientations are there for d orbitals?
5
7
3
1
33
Quantum numbers are sets of numbers that
consist of multiples of two.
are characteristic only of the hydrogen atom.
relate the energies of protons in the atomic nucleus.
specify properties of electrons.
34
Which of the following changes is a chemical change of matter?
ice melting to produce water
vinegar combining with baking soda to produce carbon dioxide
liquid silica solidifying to form glass
water boiling to produce water vapor
35
An object’s weight is a measure of
the force with which it is attracted by gravity.
the pressure exerted on a scale.
the amount of material per unit volume.
the force causing the object to move.
36
In general, which properties are common to elements within a single group on the periodic table?
boiling point and freezing point
atomic number and atomic weight
chemical properties and ability to bond to other atoms
color and luster
37
Read the image
Group 1
Group 3
Group 5
Group 2
38
1.06 L of water is equivalent to
1060 mL.
10.6 mL.
0.001 06 mL.
106 mL.
39
Which of the following changes is a physical change of matter?
paper burning
a nail rusting
a silver spoon tarnishing
water evaporating
40
Which of these terms best describes the following statement?A solution of the unknown compound turned litmus paper blue.
hypothesis
quantitative observation
qualitative observation
model
41
A measurement that closely agrees with an accepted value is best described as
precise
accurate
reproducible.
significant
42
Nonmetallic elements in Group 17 that react with most metals to form salts are
noble gases.
lanthanides
alkali metals.
halogens
43
The number of significant figures in the measurement 170.040 km is
3
4
5
6
44
Separating unpaired electrons into as many orbitals as possible
minimizes the repulsion between electrons.
results in more valence electrons.
places the electrons farther from the nucleus.
produces a greater spin quantum number.
45
Which statement best describes an element?
a pure substance made up of only one kind of atom
any kind of crystal
a substance containing only carbon atoms
any combination of two or more atoms of different types
46
If 1 inch equals 2.54 cm, how many centimeters equal 1 yard?
30.5 cm
0.0706 cm
91.4 cm
14.2 cm
47
The outer-level electron configuration of a neutral alkaline-earth metal atom consists of
two electrons in the s orbital.
one electron in the p orbital.
one electron in the s orbital.
two electrons in the p orbital.
48
A repeating pattern is referred to as
a group.
irregular
unpredictable
periodic.
49
A ground-state atom of which element has one electron in its fourth and outermost main energy level?
B
Ga
K
Na
50
The ground-state of neon is 1s^2 2s^2 2p^6. In this arrangement, how many of neon’s p suborbitals are completely filled?
1
6
3
2
51
Which orbitals can be modeled as dumbbell shaped?
d
f
p
s
52
The person whose work led to a periodic table based on increasing atomic number was
Cannizzaro
Mendeleev.
Moseley
Rutherford.
53
In a ground-state hydrogen atom in which orbital is the electron?
3s
1s
2s
2p
54
Elements in the s and p blocks of the periodic table are called
metals
alloys
transition metals.
main-group elements.
55
The noble-gas notation of bromine is [Ar] 3d^10 4s^2 4p^5. How many unpaired electrons are there in an atom of bromine
0
3
1
5
56
Read the image
none of the above
basic research.
applied research.
technological development.
57
Which is not a quantum number?
spin quantum number
angular momentum quantum number
magnetic quantum number
orbital quantum number
58
In division and multiplication, the answer should have the same number of significant figures as the
average number of significant figures in the calculation.
number in the calculation with the fewest significant figures.
total number of significant figures in the calculation.
number in the calculation with the most significant figures.
59
An element that has the electron configuration [Ne]3s23p5 is in Period
3
2
7
5
60
How many electrons can a d sublevel contain?
2
10
6
16
61
What is the difference between a mixture and a compound?
All mixtures are heterogeneous.
Mixtures are made of at least two different elements.
Mixtures can be separated by physical processes.
All mixtures have a uniform composition.
62
An element with the smallest anionic (negative-ionic) radius would be found on the periodic table in
Group 5, Period 3.
Group 1, Period 7.
Group 17, Period 2.
Group 3, Period 4.
63
Which of these measurements has been expressed to three significant figures?
500 g
0.052 g
0.202 g
3.065 g
64
An electron that is in the highest energy level of an atom and determines the atom’s chemical properties is called a(n)
valence electron.
opposite-spin electron.
paired electron.
extra electron.
65
0.25 g is equivalent to
0.025 kg.
250 mg.
250 kg.
0.025 mg.
66
A scientist is working with mathematical and computer models to learn the principles at work in a chemical reaction
analytical chemistry.
theoretical chemistry.
biochemistry.
physical chemistry.
67
Read the image
Onion plants can be used to model the effects of caffeine on living things.
Temperature, water, and light were the only variables.
The results may not be valid because there were two variables.
The amount of caffeine used was a control.
68
One way to separate the different kinds of matter in a mixture is through
decomposition
filtration
electrolysis
chemical reactions.
69
Which group of elements was discovered by Strutt and Ramsay?
actinides
lanthanides
noble gases
halogens
70
As the atomic numbers of the metals of Group 1 increase, the ionic radii
remain the same.
decrease
cannot be determined.
increase
71
The smallest unit of matter that retains the properties of that matter is
an atom
a molecule
a compound.
a mixture.
72
Expressed in scientific notation, 0.0930 m is
9.30 x 10^-4 m.
9.3 x 10^-3 m.
9.30 x 10^-2 m.
93 x 10^-3 m.
73
In the equation density = mass/volume, mass divided by volume has a constant value. This means that the
variables mass and volume are inversely proportional.
equation graphs as a hyperbola.
equation graphs as a straight line.
product of mass and volume is a constant.
74
Noble gases are generally
semiconductors.
unreactive
malleable
brittle
75
Which of the following is a noble gas?
neon
oxygen
carbon
sodium
76
Elements in Group 18 have
very low reactivity.
metallic character.
very high reactivity.
good conductivity.
77
Which of these shows SI unit prefixes arranged in order from smallest to largest?
milli, centi, kilo
kilo, milli, centi
kilo, centi, milli
centi, milli, kilo
78
The statement that no two electrons in the same atom can have the same four quantum numbers is a restatement of
Hund’s rule.
the Aufbau principle.
Bohr’s law.
the Pauli exclusion principle.
79
Which property would be least helpful in determining whether a substance is a metal or a nonmetal?
ductility
state
luster
conductivity
80
Research that is carried out for the sake of increasing knowledge is considered to be
None of the above.
basic research.
technological development.
applied research.
81
The SI base unit for mass is the
meter
gram
cubic centimeter.
kilogram
82
Which of the following is a pure substance?
water
stainless steel
granite
air
83
When 5.7 m is divided by 2 s, the quotient is correctly reported as
2.85 m/s.
2.9 m/s.
2.8 m/s.
3 m/s.
84
Which of the following is an extensive property of matter?
volume
density
boiling point
melting point
85
In developing his periodic table, Mendeleev listed on cards each element’s name, atomic mass, and
electron configuration.
properties
isotopes
atomic number.
86
Which state of matter is composed of atoms that have lost many of their electrons?
plasma
liquid
solid
gas
87
Mendeleev predicted that the gaps in his periodic table represented
undiscovered elements.
unstable elements.
ions
radioactive elements.
88
What can be removed from an atom if ionization energy is supplied?
an electron
an ion
a neutron
a proton
89
The dimensions of a rectangular solid are measured to be 1.27 cm, 1.3 cm, and 2.5 cm. The volume should be recorded as
4.1 cm3.
4.12 cm3.
4.128 cm3.
4.13 cm3.
90
To which group does hydrogen belong?
Group 18
Group 2
None of the above
Group 1
91
Across a period in the periodic table, ionization energy generally
decreases, then increases.
remains constant.
decreases
increases
92
Down a group in the periodic table, the change in ionization energy is due to
increasing electron shielding.
decreasing charge of the nucleus.
increasing neutrons in the nucleus.
decreasing atomic radii.
93
Oxygen has an electron configuration of 1s2 2s2 2p4. How many inner-shell electrons does oxygen have?
8
2
1
4
94
A sample of bismuth has a mass of 343 g and a volume of 35.0 cm3.What is the density of bismuth?
0.102 g/cm3
9.80 g/cm3
1.20 x 10 4 g/cm3
378 g/cm3
95
Homogeneous mixtures are also called
compounds
solutions
atoms
molecules
96
The graph of two variables that are directly proportional to one another is
a parabola.
a straight line.
an ellipse.
a hyperbola.
97
Across a period in the periodic table, atomic radii generally
increase, then decrease.
increase.
decrease, then increase.
decrease
98
A homogeneous mixture is one that
cannot change state easily.
contains only one element.
is uniform in composition.
acts as a solvent.
99
In which of the following measurements are all the zeros considered to be nonsignificant figures?
400. mL
60.0 mL
0.0037 mL
506 mL
100
What is the difference in atomic number between He and Ne?
32
18
2
8

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