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Chemistry Midterm
Chemistry Midterm
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Chemistry midterm review
Flashcards
92 cards
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Practice quiz
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Questions
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Answers
1
When water freezes, it is a
chemical change.
physical change.
2
Horizontal rows on the periodic table are called
triads.
periods.
groups.
3
Which would be the least stable?
He
S
F
Ne
4
What is the density of a 15.0 g sample with a volume of 3.0 cm
3
?
.20 g/cm3
45 g/cm3
5.0 g/cm3
5
Matter is anything that has mass and
reactivity.
matter.
weight.
volume.
6
Which of the following has the most energy?
radio waves
UV light
visible light
7
Which of the following is positively charged?
neutron
electron
proton
8
The electron configuration for K+ is
1s22s22p63s23p6
1s22s22p63s23p64s1
9
How many electrons does fluorine contain?
9
19
10
10
What salt dissolves in water, it is
a physical change.
a chemical change.
11
Atoms are indivisible.
True
False
12
Which of the following is in the same period as oxygen?
sulfur
nitrogen
13
A repeatable procedure that is used to test a hypothesis is
a model.
an experiment.
a law.
data.
14
How many significant digits are in the value, .00920 m?
2
5
3
4
15
Isotopes have different numbers of
neutrons.
protons.
electrons.
16
Which orbital is spherical?
f
d
s
p
17
Which of the following has chemical properties most similar to phosphorus?
nitrogen
sulfur
18
Which element is in the 2nd group and the third period?
scandium
calcium
magnesium
boron
19
Which of the following displays definite shape and definite volume?
gas
colloid
solid
liquid
20
Express 120
o
C in Kelvin.
393 K
293 K
153 K
-153 K
21
All atoms of the same element are identical.
False
True
22
Which would be the least stable?
fluorine
neon
oxygen
helium
23
Which of the following is a pure substance?
gasoline
air
gold
white paint
24
Which has 7 valence electrons?
nitrogen
argon
bromine
oxygen
25
Today, the periodic table is arranged according to
increasing atomic number.
decreasing atomic number.
increasing atomic mass.
decreasing atomic mass.
26
Some properties of the material change, but the composition of the material does not during a
physical change.
chemical change.
27
After an electron releases energy, it is in
its excited state.
its ground state.
28
Which of the following loses two electrons?
S
K
Al
Mg
29
A mixture that is not uniform throughout; ex: chicken noodle soup is
homogeneous.
heterogeneous.
30
Which is correct?
1 g = 1000 kg
1000 g = 1 kg
31
Which element in the fourth period has 2 valence electrons?
strontium
sulfur
calcium
selenium
32
Chemistry is the study of _________ and the changes it undergoes.
volume
chemicals
mass
matter
33
When metal rusts, it is
a physical change.
a chemical change.
34
What is the formula for the compound formed between Ca and S?
CaS
Ca2S2
Ca2S
CaS2
35
Numerical measurements collected during an experiment are called
statics.
quanta.
quantitative data.
qualitative data.
36
In the measurement, 5.84 mL, which digit is the most uncertain?
4
mL
5
8
37
The entire third energy level can hold
8 electrons.
32 electrons.
18 electrons.
38
An atom is
filled with dense particles.
composed of protons and electrons in the nucleus.
mostly empty space.
39
Which of the following has definite volume, but indefinite shape?
liquid
solid
gas
40
Express 173 K in
o
C.
373 oC
-100 oC
-173 oC
100 oC
41
Neon has three stable isotopes: Neon-20; neon-21; neon-22. Which is the most abundant?
neon-22
neon-21
neon-20
42
Which of the following is a mass?
5.5 N
5.5 mL
5.5 cm3
5.5 kg
43
Part 2 is
the amplitude.
the wavelength.
the crest.
the frequency.
44
In order to occupy the same orbital, electrons must have
similar size.
opposite spin.
similar spin.
different size.
45
A proposed explanation for an observations is called
a law.
a hypothesis.
a theory.
a model.
46
A mixture in which the composition is uniform throughout; ex: milk is
heterogeneous.
homogeneous.
47
Which element in the second period gains 3 electrons?
boron
phosphorous
nitrogen
aluminum
48
As wavelength increases, frequency
decreases.
increases.
stays the same.
49
When magnesium is burned in air, white magnesium oxide is formed. Magnesium is
a reactant.
a product.
50
How many significant digits are in the value, 56001 s?
4
2
5
3
51
A measure of the amount of space occupied by a sample of matter is its
weight.
mass.
volume.
molarity.
52
Express 9800000 s in scientific notation.
9.8x106 s
9.8x10-6 s
9.8x105 s
9.8x10-5 s
53
Elements in group 2 are called
halogens.
alkali metals.
noble gases.
alkaline earth metals.
54
Which of the following has a negative charge?
electron
neutron
proton
55
Which is bigger?
F-
F
56
How many zeroes are significant in the value, .050010 L?
4
3
5
1
57
The study of mechanisms and rates of energy transfer that occur when matter changes is
analytical chemistry.
physical chemistry.
organic chemistry.
inorganic chemistry.
58
The study of carbon containing compounds is
analytical chemistry.
inorganic chemistry.
organic chemistry.
biochemistry.
59
Rutherford proved that the nucleus is
dense and positively-charged.
dense and negatively-charged.
low in density and negatively-charged.
low in density and positively-charged.
60
Express .000043 kg in scientific notation.
4.3x104kg
4.3x10-4 kg
4.3x105kg
4.3x10-5kg
61
Expand 4.2x10
6
m/s.
4200000 m/s
.00000042 m/s
.0000042 m/s
42000000 m/s
62
Which is bigger?
Rb
I
63
Which of the following forms a +2 ion?
potassium
sulfur
chlorine
barium
64
A measure of the amount of matter that an object contains is its
volume.
length.
mass.
weight.
65
Which group's configuration ends with s
2
p
5
?
halogens
nitrogen family
noble gases
oxygen family
66
What is the name of Na
3
N?
monosodium nitride
sodium mononitrogen
sodium nitrogen
sodium nitride
67
Part 1 is the
crest.
frequency.
amplitude.
wavelength.
68
The entire 3p sublevel can hold
8 electrons.
2 electrons.
10 electrons.
6 electrons.
69
How many protons does fluorine contain?
19
9
10
70
Which is correct?
1 L = 1000 mL
1000 L = 1 mL
71
Express in .00009 m in scientific notation.
9x10-5 m
9x104 m
9x105 m
9x10-4 m
72
The study of the processes that take place in living organisms is
physical chemistry.
biochemistry.
organic chemistry.
inorganic chemistry.
73
The study of substances that, in general, do not contain carbon is
physical chemistry.
organic chemistry.
biochemistry.
inorganic chemistry.
74
Which is bigger?
Cs
K
75
How many neutrons does fluorine contain?
9
10
19
76
The true mass of a sample is 6.0g.Students measure it to be 6.5g. The percent error is
7.7%
8.3%
92.3%
108.3%
77
Which halogen is in the third period?
fluorine
argon
bromine
chlorine
78
Which of the following has the greatest wavelength?
red light
violet light
green light
79
Which is an ionic compound?
CO2
MgI2
H2O
80
A representation of an object or event is
an experiment.
a theory.
a model.
a law.
81
A substance that contains two or more elements chemically combined in a fixed proportion is
an element.
a solution.
a compound.
a mixture.
82
What is the formula for the compound formed between Mg and Cl?
MnCl
MgCl3
MgCl
MgCl2
83
The electron configuration for F- is
1s22s22p5
1s22s22p6
84
A solid that forms during a reaction is called
a reactant.
a solution.
a soluble salt.
a precipitate.
85
The simplest form of matter that has a unique set of properties is
a solution.
a mixture.
a compound.
an element.
86
All elements are composed of atoms.
False
True
87
Which of the following has the most energy?
2p
2s
3s
4s
88
Which is more electronegative?
Cs
Na
89
A well-tested explanation for a broad set of observations is called
a hypothesis.
an experiment.
a model.
a theory.
90
Which of the following is a volume?
6.2 mL
6.2 cm
6.2 kg
91
Which is correct?
100 m = 1 cm
1 m = 100 cm
92
How many valence e- does the element with the following config have: 1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
3d
10
4p
5
2
7
5
15
