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.

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

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.

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

equation graphs as a straight line.

Which statement best describes an element?

a pure substance made up of only one kind of atom

What is the difference between a mixture and a compound?

Mixtures can be separated by physical processes.

studbud

Chem Exam study guide 2

100 termsStudBud Administration12 plays

Imported from external platform

Flashcards100 cardsFPractice quizPHost liveL

Questions 100

Answers

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

Chem Exam study guide 2 Flashcards | StudBud