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

chemical composition of a new substance.

Separating unpaired electrons into as many orbitals as possible

minimizes the repulsion between electrons.

In the equation density = mass/volume, mass divided by volume has a constant value. This means that the

equation graphs as a straight line.

In division and multiplication, the answer should have the same number of significant figures as the

number in the calculation with the fewest significant figures.

The results may not be valid because there were two variables.

An object’s weight is a measure of

the force with which it is attracted by gravity.

Quantum numbers are sets of numbers that

specify properties of electrons.

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

half the distance between the nuclei.

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Chem Exam study guide 2

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

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