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WorksheetsChemistry Semester 1 Review
Total questions: 131
Worksheet time: 3hrs 28mins
Name
Class
Date
1.
A substance is matter that has a definite composition.
a)
True
b)
False
2.
A control is the part of the experiment that the other results will be compared to.
a)
True
b)
False
3.
Chemistry is the study of matter and the changes it goes through.
a)
True
b)
False
4.
When conducting an experiment, you should only manipulate one variable at a time.
a)
True
b)
False
5.
If you wear glasses already, you do not need to wear safety goggles.
a)
True
b)
False
6.
In determining the percent error, only the size of the difference matters, not whether the measured value is above or below the accepted value.
a)
True
b)
False
7.
A change of state is a chemical change because ice and water do not resemble one another.
a)
True
b)
False
8.
When a chemical change occurs, the products have a greater mass than the reactants.
a)
True
b)
False
9.
A chemical change is always accompanied by changes in physical properties.
a)
True
b)
False
10.
Crystallization is a separation technique used to produce rock candy from a sugar solution.
a)
True
b)
False
11.
An alpha particle is the equivalent of a Helium-4 nucleus.
a)
True
b)
False
12.
Nuclear decay can change one element into another one.
a)
True
b)
False
13.
The modern periodic table is arranged from right to left in order of increasing atomic mass.
a)
True
b)
False
14.
An s orbital is in the shape of a dumbbell.
a)
True
b)
False
15.
[Kr]5s24d105p5 is the correct electron configuration for the element Bromine.
a)
True
b)
False
16.
Valence refers to the total number of electrons that exist in the orbitals that occupy the outermost energy level of an atom.
a)
True
b)
False
17.
The transition elements consist only of those that are found in block d of the periodic table.
a)
True
b)
False
18.
The octet rule states that atoms will gain, lose, or share electrons to achieve a complete set of eight valence electrons.
a)
True
b)
False
19.
Elements in Group 17 are classified as halogens.
a)
True
b)
False
20.
Group 1 Elements are classified as Alkaline Earth Metals.
a)
True
b)
False
21.
It’s okay to eat during lab, as long as you are not the one performing the experiment.
a)
True
b)
False
22.
Which precaution should you take when you see a safety symbol of a hand and a water faucet?
a)
wear heat- and cold-resistant gloves
b)
do not touch sharp objects
c)
do not touch toxic substances
d)
wash your hands after the lab
23.
Which precaution should you take when working with a scalpel?
a)
wear heat- and cold-resistant gloves
b)
do not touch sharp objects
c)
do not touch toxic substances
d)
wash your hands after the lab
24.
Which is the part of the experiment that is the measurable outcome?
a)
independent variable
b)
dependent variable
c)
control
d)
conclusion
25.
Which is the part of the experiment that the researcher manipulates?
a)
independent variable
b)
constants
c)
control
d)
dependent variable
26.
Which of the following is qualitative data?
a)
Color
b)
Pressure
c)
Temperature
d)
Volume
27.
What do scientists call a summary of accepted facts of nature?
a)
hypothesis
b)
scientific theory
c)
existing knowledge
d)
scientific law
28.
What kind of graph would you use with data that showed how the boiling temperature of water changes with the amount of salt added?
a)
Line graph
b)
Circle graph
c)
Bar graph
d)
None of the above
29.
The accepted value of a measurement is 5.12.
Which correctly describes this student's experimental data?
5.92, 4.1, 7.8
Which correctly describes this student's experimental data?
5.92, 4.1, 7.8
a)
accurate but not precise
b)
precise but not accurate
c)
Optionboth accurate and precise
d)
neither accurate nor precise
30.
The accepted value is 15.63. Which correctly describes this student’s experimental data?
12.84, 13.02, 12.96
12.84, 13.02, 12.96
a)
accurate but not precise
b)
precise but not accurate
c)
both accurate and precise
d)
neither accurate nor precise
31.
What is the formula for density?
a)
D=M/V
b)
D = V/M
32.
How many significant digits are in the value 530,405,000?
a)
4
b)
5
c)
6
d)
9
33.
According to rounding rules for addition, the sum of 27.1, 34.538, and 37.68 is ____.
a)
99.318
b)
99.3
c)
99.31
d)
99
34.
What is the change of state in which a gas becomes a liquid?
a)
sublimation
b)
freezing
c)
condensation
d)
melting
35.
Which is an example of a homogeneous mixture?
a)
sand
b)
clean air
c)
vegetable soup
d)
fresh-squeezed orange juice
36.
A chemical composition of two or more different elements joined together in fixed proportions is known as a(n) ____.
a)
compound
b)
element
c)
homogeneous mixture
d)
heterogeneous mixture
37.
Which scientist described the existence of the neutron?
a)
Chadwick
b)
Thomson
c)
Rutherford
d)
Bohr
38.
Which one is comprised of the other three?
a)
proton
b)
atom
c)
electron
d)
neutron
39.
How many neutrons are in an atom of chlorine?
a)
17
b)
18
c)
34
d)
35
40.
Which element has 14 protons?
a)
Nitrogen
b)
Silicon
c)
Aluminum
d)
Sulfur
41.
According to the modern concept of the atom, which are located in the nucleus of an atom?
a)
electrons and protons
b)
protons only
c)
neutrons and electrons
d)
protons and neutrons
42.
Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s1 3d5?
a)
Titanium (Ti)
b)
Chromium (Cr)
c)
Sulfur (S)
d)
Selenium (Se)
43.
Which of these elements has 5 valence electrons?
a)
Boron (B)
b)
Rubidium (Rb)
c)
Vanadium (V)
d)
Arsenic (As)
44.
Which is defined as the energy required to remove an electron from an atom of an element in the gaseous state?
a)
ionization energy
b)
electronegativity
c)
ionic radius
d)
law of octets
45.
Which correctly describes elements in the same group?
a)
They have the same number of valence electrons.
b)
They have electrons in the same outermost energy level.
c)
They have the same atomic radius.
d)
They must be in the same state of matter.
46.
Electrons of which of the following charges:
a)
positive
b)
negative
c)
neutral
d)
super
47.
Which of the following particles is not located within the nucleus of an atom?
a)
proton
b)
electron
c)
neutr
48.
According to the Law of Conservation of Mass, in any chemical change
a)
the mass of reactants is greater than the mass of products
b)
the mass of reactants is less than the mass of products
c)
the mass of reactants is equal to the mass of products
d)
the masses of products and reactants have no predictable relationship
49.
An atom of the element phosphorus (P) contains 15 electrons. Determine which sub-level is partially filled
a)
2s
b)
3p
c)
4d
d)
4p
50.
Which is the part of an experiment that serves as the point of comparison for the results?
a)
hypothesis
b)
independent variable
c)
constant
d)
control
51.
Which category of elements have the property of being malleable and ductile?
a)
gases
b)
metals
c)
metalloids
d)
nonmetals
52.
Which is defined as the energy required to remove an electron from an atom of an element in the gaseous state?
a)
ionization energy
b)
electronegativity
c)
ionic radius
d)
law of octets
53.
Which correctly describes elements in the same group?
a)
They have the same number of valence electrons.
b)
They have electrons in the same outermost energy level.
c)
They have the same atomic radius.
d)
They must be in the same state of matter.
54.
Which of the following elements is a metal?
a)
Boron
b)
Nitrogen
c)
Magnesium
d)
Carbon
55.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
56.
all matter is made of what
a)
energy
b)
atoms
c)
electrons
d)
compounds
57.
If an atom has 3 electrons, how many protons does it have?
a)
1
b)
2
c)
4
d)
3
58.
If the number of protons equal the number of _____, the atom will have no charge
a)
protons
b)
neutrons
c)
electrons
d)
nucleus
59.
What is the atomic number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
60.
What is the mass number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
61.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
62.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
63.
During a chemical reaction, atoms are NOT
a)
Rearranged
b)
Created
c)
Broken
d)
Growing
64.
Which is the following is NOT a sign of a chemical change?
a)
Releasing a gas
b)
Releasing bubbles
c)
Changing state
d)
Rearranging atoms
65.
what is the definition of chemical change?
a)
any change that results in the formation of new chemical substances.
b)
changing clothes
c)
matter cannot be created or destroyed, only change form
d)
changes affecting the form of a chemical substance, but not its chemical composition.
66.
what happens when water freezes?
a)
ice is formed; chemical property
b)
cold water is formed; physical change
c)
ice is formed; physical change
d)
cold water is formed; chemical change
67.
Which is an example of a chemical change?
a)
coloring a paper
b)
rusting steel wool
c)
bending steel wool
d)
freezing water
68.
An element has properties of BOTH metals and nonmetals. WHERE would it be found in the periodic table?
a)
To the right
b)
To the left
c)
on the zig zag line
69.
Look at the periodic table that is provided. Where would metals be located?
a)
to the left of the table in blue
b)
to the right of the table in pink
c)
in the zigzag line in yellow
70.
The elements argon, krypton, and xenon are all non-metals. What property would these elements have in common?
a)
Good conductor of thermal energy
b)
Poor conductor of electricity
c)
Shiny, lustrous surface
d)
Soft and malleable
71.
Silicon is a semiconductor and has properties of both metals and nonmetals. What type of element is Silicon?
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Pretty
72.
How would this element be classified?
a)
Metal
b)
Nonmetal
c)
Metalloid
d)
Metamorphic
73.
Which of the following is a chemical property?
a)
how something tastes
b)
ability to explode
c)
ability to float in water
d)
size of an object
74.
Is salt (NaCI) a compound or a element
a)
Compound
b)
element
75.
How many elements are represented in the compound?
Na2CO3
Na2CO3
a)
1
b)
2
c)
3
d)
4
76.
When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced
a)
charge
b)
subscript
c)
random number
d)
coefficient
77.
Balance this equation:
2Li + Cl2 -> LiCl
2Li + Cl2 -> LiCl
a)
2Li + Cl2 -> 4LiCl2
b)
2Li + Cl2 -> LiCl2
c)
2Li + Cl2 -> 2LiCl
78.
How many F atoms are in this compound?
6MgF2
6MgF2
a)
2
b)
6
c)
8
d)
12
79.
How many atoms are there TOTAL in:
H2SO4
H2SO4
a)
6
b)
5
c)
7
d)
3
80.
Which one is a compound?
a)
Co
b)
Br
c)
Fe
d)
CO
81.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
82.
This picture represents which of the following?
a)
element
b)
compound
c)
mixture
83.
The horizontal rows on the periodic table are known as
a)
periods.
b)
atoms.
c)
groups or families.
d)
valence electrons.
84.
the central region of an atom where its neutrons and protons are is its
a)
nucleus
b)
electron cloud
c)
core
d)
center
85.
In which region would the most reactive elements be found?
a)
1
b)
4
c)
5
d)
3
86.
In which region would the least reactive elements be found?
a)
1
b)
4
c)
3
d)
5
87.
A "group" is a ____________ on the periodic table.
a)
column
b)
row
88.
Which of the following is an extensive property?
a)
boiling point
b)
volume
c)
density
d)
melting point
89.
Which of the following is an intensive property of matter?
a)
density
b)
energy content
c)
volume
d)
mass
90.
Precision is related to all of the following except
a)
reproducibility of measurements
b)
range of measurement values
c)
number of significant figures
d)
closeness of a measurement to the accepted value
91.
How many significant figures are in the number 170.040?
a)
3
b)
4
c)
5
d)
6
92.
0.0930 in scientific notation
a)
93 x 10-3
b)
9.3 x 10-3
c)
9.30 x 10-2
d)
9.30 x 10-4
93.
In an orbital diagram, the opposite pointing arrows indicate two electrons with
a)
opposite spin states.
b)
the same spin states.
c)
different energies.
d)
the same energy.
94.
The lowest energy state of an atom is its
a)
highest-occupied energy level.
b)
principle quantum number.
c)
electron configuration.
d)
ground state.
95.
the noble gas configuration for chlorine
a)
[Ar] 3s23p5
b)
[Ne]3s23p4
c)
[Ar]3s23p4
d)
[Ne]3s23p5
96.
Which of the following has the greatest atomic radius?
a)
Al
b)
S
c)
Si
d)
C
97.
Which of the following is NOT a metal
a)
H
b)
Ga
c)
Pu
d)
V
98.
A covalent bond is formed when 2 atoms
a)
share an electron with each other.
b)
share one or more pairs of electrons with each other.
c)
gain electrons.
d)
gain and lose electrons.
99.
In what block do you find platinum?
a)
s
b)
p
c)
d
d)
f
100.
The red numbers in the image below represent ________
a)
subscripts
b)
coefficients
c)
I don't know, and don't want to try
d)
None of the answers are correct
101.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
102.
The substances at the beginning of a chemical equation are called the ____
a)
product
b)
yield
c)
chemical symbol
d)
reactants
103.
In a chemical reaction, everything to the rightof the arrow is called ______________.
a)
Products
b)
Yields
c)
Molecules
d)
Reactants
104.
Is the following equation balanced or unbalanced?
Fe + S --> FeS
Fe + S --> FeS
a)
balanced
b)
unbalanced
105.
a)
energy levels
b)
valence electrons
c)
protons
d)
neutrons
106.
a)
Group 1
b)
Group 17
c)
Group 2
d)
Group 18
107.
What is the mass number of this atom?
a)
1
b)
3
c)
4
d)
7
108.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
109.
In a liquid, the molecules have a definite shape and a definite volume
a)
True
b)
False
110.
Elements in this area can best be described as -
a)
Malleable
b)
Brittle
c)
Dull
d)
Insulators
111.
Elements in this area can best be described as -
a)
Semi-conductors
b)
Insulators
c)
Ductile
d)
Siny
112.
During an endothermic reaction, energy will be...
a)
released
b)
absorbed
c)
destroyed
d)
created
113.
In an _____________ reaction, the reactants will have more energy than the products.
a)
exothermic
b)
endothermic
c)
chemical
d)
activation
114.
A change in the color of a solution is a sign that
a)
chemical change is taking place
b)
physical change is taking place
c)
oxygen is present
d)
organic chemicals are present
115.
In which state of matter do the particles spread apart and fill all the space available to them?
a)
solid
b)
liquid
c)
gas
116.
What is salad?
a)
element
b)
compound
c)
mixture
117.
?
a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
118.
a)
Student A
b)
Student B
c)
Student C
d)
Cannot be determined
119.
a)
Student A
b)
Student B
c)
Student C
d)
Cannot be determined
120.
A set of data are all close to each other, and they are close to the actual value. This set of data can be described as...
a)
accurate
b)
precise
c)
both precise and accurate
121.
This bullseye demonstrates...
a)
High Accuracy & High Precision
b)
High Accuracy & Low Precision
c)
Low Accuracy & High Precision
d)
Low Accuracy & Low Precision
122.
How many significant figures does the following number have: 0.002040
a)
6
b)
4
c)
3
d)
2
123.
How many significant figures does the following number have: 0.998005
a)
9
b)
10
c)
6
d)
5
124.
Round 0.010229 to four sig figs
a)
1022
b)
1023
c)
0.01023
d)
0.01022
125.
What is the measurement 1042 Liters rounded to 2 significant figures?
a)
1040 L
b)
1.1 x 103 L
c)
1.0 x 103 L
d)
1050 L
126.
How many significant figures does the following number have: 1740200
a)
2
b)
1
c)
3
d)
5
127.
Calculate 5.50 cm + 5.50 cm and give your answer with the appropriate number of significant figures.
a)
11 cm
b)
11.0 cm
c)
11.00 cm
d)
11.000 cm
128.
Calculate 12.34 + 1.234 + 0.1234 and give your answer with the appropriate number of significant figures.
a)
13.6974
b)
13.697
c)
13.70
d)
13.7
129.
Calculate 123000 m x 3234 m and give your answer with the appropriate number of significant figures.
a)
3.97 x 10-7 m2
b)
39800000 m2
c)
398 m2
d)
3.98 x 108 m2
130.
Calculate 12.47 m ÷ 3.2 s and give your answer with the appropriate number of significant figures.
a)
4 m/s
b)
3.9 m/s
c)
3.90 m/s
d)
3.897 m/s
131.
Calculate 0.020 cm x 50 cm x 11.1 cm and give your answer with the appropriate number of significant figures.
a)
10 cm3
b)
11.1 cm3
c)
11 cm3
d)
11. cm3
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