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chemical reactions and the periodic table

Total questions: 145

Worksheet time: 2hrs 1mins

Name
Class
Date
1.
4Si + S8 --> 2Si2S4
a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Double displacement
2.
3Ca + 2AlCl3 --> 3CaCl2 + 2Al
a)
Synthesis
b)
Decomposition
c)
Single diplacement
d)
Double displacement
3.
3KOH + H3PO4 --> K3PO4 + 3H2O
a)
Synthesis 
b)
Decomposition
c)
Single displacement
d)
Double displacement
4.
2NO2 --> N2 + 2O2
a)
Synthesis
b)
Decomposition
c)
Single displacement
d)
Combustion
5.
Which chemical reaction breaks down into 2 substances?
a)
Double Replacement
b)
Single Replacement
c)
Synthesis
d)
Decomposition
6.
Which chemical reaction switches 2 elements?
a)
Double Replacement
b)
Single Replacement
c)
Combustion
d)
Decomposition
7.
A + B = AB
a)
Double Replacement
b)
Synthesis
c)
Combustion
d)
Decomposition
8.
AB + CD = AD + CB
a)
Double Replacement
b)
Single Replacement
c)
Combustion
d)
Decomposition
9.
A + BC = B + AC
a)
Single Replacement
b)
Combustion
c)
Double Replacement
d)
Synthesis
10.
In a chemical equation, is it true that -
a)
the reactant side and product side can have different numbers of atoms for each element
b)
there can be different elements on the reactant side and the product side
c)
an element or compound must be accompanied by a phase change
d)
the coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made
11.
Which of the following models best demonstrates a balanced chemical equation?
a)
F
b)
G
c)
H
d)
J
12.
The formula below represents the most common carbohydrate known as glucose. Which information can be determined from the chemical formula?
C6H12O6
a)
The structural arrangement of the atoms in a glucose molecule
b)
The color of a glucose molecule
c)
The size of a glucose molecule
d)
The number of atoms of each element in a glucose molecule
13.
For an investigation a student poured a blue solution of CuSO4 into a beaker. The student placed a shiny, silver-colored strip of zinc metal in the solution and observed the changes.
The student inferred that a chemical reaction occurred. What evidence supports this inference?
a)
A dark solid formed on the zinc metal.
b)

The zinc metal remained silver-colored and shiny
c)
The CuSO4 solution turned blue when the zinc metal was added.
d)
None of these
14.
Which of the following equations demonstrates an actual chemical reaction that forms a new substance?
a)
A
b)
B
c)
C
d)
D
15.
Which of these formulas contain equal numbers of nitrogen atoms?
a)
Formulas I and III
b)
Formulas I and IV
c)
Formulas II and III
d)
Formulas I, II, and V
16.
The reactants are on the left side of the chemical equation.
a)
True
b)
False
17.
Two clear colorless solutions were combined.
The student observed that the temperature changed from 25 •C to 23 •C when the solutions were combined and that a white substance rapidly formed and settled to the bottom of the container. What most likely happened to produce these results?
a)
One of the original compounds came out of solution
b)
The solutions reacted chemically
c)
Some of the water froze into ice crystals
d)
Rapid evaporation of water occurred, leaving a solid
18.
The equation below represents a chemical reaction that occurs in living cells. How many atoms are represented in the reactants of this equation?
a)
6
6
b)
12
12
c)
24
24
d)
36
36
19.
In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?
a)
H3PO4
b)
H2SO4
c)
HCIO3
d)
H20
20.

How many atoms in all are in a molecule of serotonin?

C10H12N2O

a)
22
b)
24
c)
25
d)
4
21.
Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?
a)
The shape of the coal changes
b)
Oxygen is present
c)
A new substance is produced
d)
Coal is made up of more than one element
22.
All of the following reactions are correctly balanced except-
a)
A
b)
B
c)
C
d)
D
23.

In a ___________change, a substance changes into a different substance.

a)

Physical

b)

Chemical

24.

Which of these is NOT a sign that a chemical change has occurred?

a)

A loss of transparency

b)

An unexpected color change

c)

A temperature change

d)

The formation of a precipitate

25.

The Law of Conservation of Mass states

a)

that matter exists in all states and reacts the same

b)

that matter can only be changed into new substances by introducing a catalyst

c)

that matter exists in the same state throughout any chemical change

d)

that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants

26.

How many F atoms are in this compound?

6MgF2

a)

2

b)

6

c)

8

d)

12

27.

a copper penny turning greenish after a few years.

a)

Physical change

b)

Chemical change

28.

___________________ are the elements or compounds that leave (are formed in) a chemical reaction.

a)

Polymers

b)

Bonds

c)

Reactants

d)

Products

29.
In a chemical equation, is it true that
a)
the reactant side and product side can have different numbers of atoms for each element
b)
there can be different elements on the reactant side and the product side
c)
the reactant and product side have the same atoms for each element
30.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
31.
Why must chemical equations be balanced?
a)
So that the equation doesn't explode
b)
The reaction won't happen until it is balanced
c)
Matter cannot be created or destroyed
d)
None of these
32.
2Ca + O2 --> 2CaO 
What is the 2 located behind oxygen (O) called?
a)
coefficient
b)
reactant
c)
subscript
d)
product
33.
The left side of the equation below is called
a)
Products
b)
Reactants
34.
The right side of the equation below is called the
a)
products
b)
reactants
35.
A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction.
a)
Coefficient
b)
reactant
c)
subscript
d)
product 
36.
In the equation,
2Mg + O2 --> 2MgO
which are the reactants?
a)
Mg and O2
b)
MgO
c)
Mg and MgO
d)
O2 and MgO
37.
___________________ are the elements or compounds that are formed in a chemical reaction.
a)
coeffiecients
b)
Bonds
c)
reactants
d)
products
38.
What symbol is used to represent yield in a chemical equation?
a)
->
b)
+
c)
-
d)
()
39.

What must go in the blank space to balance the equation?

4Fe + ____O2 --> 2Fe2O3

a)

1

b)

2

c)

3

d)

4

40.
The substances to the right of the arrow in a chemical equation are called-
a)
coefficient
b)
reactant
c)
subscript
d)
product
41.

2Ca + O2 > 2CaO 

What is the 2 located in front of calcium (Ca) called? 

a)
coefficient
b)
subscript
c)
reactant
d)
product
42.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
43.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
44.
Which coefficients balance this equation:
NH3  +  O2 ---->   NO  + H2O
a)
2,3,5,6
b)
5,5,4,6
c)
4,6,4,5
d)
4,5,4,6
45.
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
a)
2, 6, 3, 2
b)
it is already balanced
c)
4, 12, 3, 4
d)
2, 1, 4, 5
46.
Which reaction type is the following: C5H10 + O2 --> CO2 + H2O
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Double Replacement
47.
Which of the following is an example of synthesis?
a)
Na + Br2 --> NaBr
b)
KClO3 --> KCl + O2
c)
HgO + Cl2-->HgCl + O2
d)
Cl2 + NaBr --> NaCl + Br2
48.
FeCl +   Br2 ------------>  2FeBr  +  Cl is a 
a)
Decomposion reaction
b)
Single displacement
c)
Double displacement
d)
Synthesis
49.

Anything that has mass and takes up space

a)

matter

b)

mixtures

c)

compounds

d)

chemical reactions

50.

Anything that has mass and takes up space

a)

matter

b)

mixtures

c)

compounds

d)

chemical reactions

51.

A single, small piece of matter

a)

molecule

b)

compound

c)

atom

d)

space

52.

Two or more atoms chemically bonded.

a)

elements

b)

atoms

c)

molecules

d)

matter

53.

These are found on the periodic table and made of one type of atom

a)

atoms

b)

elements

c)

electrons

d)

mixtures

54.

2 or more elements chemically bonded. For example, carbon dioxide (CO2 )

a)

atom

b)

molecule

c)

compound

d)

mixture

55.

Texture, color, states of matter, flexibility, freezing & melting points

a)

chemical properties

b)

physical properties

c)

states of matter

56.

C6H12O11 is best described as a ...

a)

Chemical mixture

b)

Chemical formula

c)

Chemical Equation

57.

Which 2 words describe this image

a)

atom & molecule

b)

molecule & element

c)

molecule & compound

d)

atom & compound

58.

Which 2 words describe this image

a)

atom & molecule

b)

molecule & element

c)

molecule & compound

d)

atom & compound

59.

Which 2 words describe this image

a)

atom & molecule

b)

molecule & element

c)

molecule & compound

d)

atom & element

60.

Which 2 kinds of particles make up the nucleus of an atom?

a)

electrons & neutrons

b)

protons & neutrons

c)

protons & electrons

d)

the core

61.

Which particle carries a negative charge?

a)

electron

b)

proton

c)

neutron

d)

nuclues

62.

A pure substance that cannot be broken down into any other substance by chemical or physical means. There are more than 100 of us shown in the Periodic Table

a)

compound

b)

molecule

c)

element

d)

mixture

63.

How many protons are in one atom of Al?

a)

13

b)

Al

c)

29.98

d)

16.98

64.

What is the atomic number for Al?

a)

13

b)

Al

c)

29.98

d)

16.98

65.

What is the chemical symbol for Al?

a)

13

b)

Al

c)

29.98

d)

16.98

66.

What is the atomic mass of Aluminum?

a)

13

b)

Al

c)

26.98

d)

16.98

67.

breaking and forming bonds that changes reactants into products (making something new and different)

a)

chemical reaction

b)

physical reaction

c)

emotional reaction

68.

How do you find how many nuetrons are in an atom?

a)

subtract the atomic number by the atomic mass

b)

its the same as the protons

c)

its the atomic mass

d)

add the atomic number and the atomic mass

69.

what element does not belong?

a)

H

b)

Ne

c)

Na

d)

K

70.

what one describes a metaloid?

a)

shiny, good conductors, malleable, ductile, and high density

b)

dull, insulator, non- malleable

c)

semi- conductor, shiny or dull, malleable or brittle

d)

none of the above

71.

how can you tell the number of energy shells an atom has?

a)

the period number

b)

the group number

c)

the atomic mass

d)

the valence electrons

72.

What is an ion?

a)

an atom with a positive or negative charge

b)

an isotope

c)

an atom with a different number of neutrons than others

d)

change in number of protons on an atom

73.

When an atom gains or loses an electron it becomes an _____.

a)

isotope

b)

oxygen

c)

ion

d)

neutron

74.

Which of the following is a noble gas?

a)

oxygen

b)

iron

c)

hydrogen

d)

neon

75.

Which element is an alkali metal?

a)

lithium

b)

cobalt

c)

mercury

d)

calcium

76.

Which element is an alkaline earth metal?

a)

lithium

b)

vanadium

c)

carbon

d)

calcium

77.

Which element is a halogen?

a)

helium

b)

hydrogen

c)

flourine

d)

oxygen

78.

Which element would probably be a good conductor of electricity?

a)

bromine

b)

helium

c)

gold

d)

sulfur

79.

number of protons in the nucleus of each atom of a given element; is the top number in the periodic table

a)

atomic mass

b)

mass number

c)

atomic number

d)

isotope

80.

a substance produced when elements combine and whose properties are different from each of the elements in it

a)

element

b)

matter

c)

mixture

d)

compound

81.

two or more atoms of the same element that have different numbers of neutrons in their nuclei

a)

atom

b)

compound

c)

isotope

d)

substance

82.

states that matter is not created or destroyed but only changes form

a)

substance

b)

atomic number

c)

mass number

d)

law of conservation of matter

83.

an uncharged particle located in the nucleus of an atom

a)

electron

b)

neutron

c)

proton

d)

nucleus

84.
Which of the following is a compound?
a)
copper
b)
methane
c)
lead
d)
hydrogen
85.
Carbon, at room temperature, is dull, brittle, and shatters easily. What is it?
a)
a metal
b)
a non-metal
c)
a noble gas
d)
none of these is correct
86.
Which of the following is a metal?
a)
helium
b)
chlorine
c)
fluorine
d)
potassium
87.
A row in the periodic table is called a
a)
group
b)
family
c)
period
d)
orbit
88.
This family doesn't much like to mix with others.
a)
alkali metals
b)
alkaline earth metals
c)
halogens
d)
noble gases
89.

Elements that have the same number of valence electrons

a)

are in the same group and are arranged in rows across

b)

are in the same group and are arranged in vertical columns

c)

are in the same period and are arranged in rows across

d)

are in the same period and are arranged in vertical columns

90.

Elements in the same period

a)

have the same number of valence electrons

b)

have the same number of energy levels

c)

have similar properties

d)

have the same number of protons

91.

If an element is found in Group 17 it will have ____ valence electrons?

a)

17

b)

2

c)

8

d)

7

92.

What is the atomic mass of the element shown?

a)

79

b)

196.967

c)

118

d)

275.967

93.

How many neutrons are in found in an atom of gold?

a)

79

b)

196.967

c)

118

d)

295.967

94.

Which element is found in Period 1, Group 18?

a)

H

b)

He

c)

Ar

d)

Ne

95.

Which period would the element in the picture be in on the periodic table?

a)

1

b)

2

c)

4

d)

6

96.
What is the chemical symbol for the element Silicon
a)
S
b)
Si
c)
si
d)
Sl
97.
What element is represented by the Chemical symbol Mg
a)
Manganese
b)
Magnesium
c)
Molybdenum
d)
Mitrium
98.
What is the chemical symbol for the element Fluorine
a)
F
b)
Fl
c)
Flu
d)
f
99.
a)
Periods
b)
Groups
100.
a)
Periods
b)
Groups
101.
a)
Same group
b)
Same period
102.
a)

Group 1

b)

Group 7

c)

Group 0

d)

Group 2

103.
a)
Metals
b)
Nonmetals
c)
Metalloids
104.
a)
Metals
b)
Nonmetals
c)
Metalloids
105.
The period for Bromine is ___________.
a)
3
b)
2
c)
4
106.
Beryllium is in group number______.
a)
Group 2
b)
Group 3
c)
Group 4
d)
Group 7
107.

An Element

a)

Contains one thing

b)

Contains ONLY one type of atom

c)

Contains two or more type of atoms - chemically bonded together

d)

Contains two or more types of atoms - NOT chemically bonded together

108.

Mixtures contain...

a)

Two or more things

b)

Two or more types of atom, chemically bonded together

c)

Two or more types of atom, NOT chemically bonded together

d)

ONLY one type of atom

109.

CO2 contains how many Oxygen atoms?

a)

1

b)

2

c)

3

d)

4

110.

CO2 contains how many Carbon atoms?

a)

1

b)

2

c)

3

d)

4

111.

H2SO4 contains how many Hydrogen atoms?

a)

1

b)

2

c)

3

d)

4

112.

H2SO4 contains how many Oxygen atoms?

a)

1

b)

2

c)

3

d)

4

113.
Which of the following statements about transition metals is true?
a)
They include familiar metals such as gold, silver, copper, and nickel.
b)
They are never found uncombined in nature.
c)
They are the most reactive of all the types of metals.
d)
They are so soft that they can be cut with an ordinary knife.
114.
Fluorine, chlorine, bromine, and iodine are part of a family called
a)
metalloids.
b)
noble gases.
c)
alkali metals.
d)
halogens.
115.
An element's properties can be predicted from its
a)
number of isotopes
b)
number of neutrons
c)
atomic mass
d)
location in the periodic table
116.
"C" is the element symbol for which element?
a)
calcium
b)
carbon
c)
chlorine
d)
cadmium
117.
What do atoms that form positive ions tend to do?
a)
Tend to lose electrons 
b)
Tend to lose protons
c)
Tend to gain electrons
d)
Tend to gain protons
118.
What happens when an atom gain an electron?
a)
Neutral(no charge)
b)
Positive charge
c)
Negative charge
119.
What is a valence electron?
a)
an electron that is found in the outermost shell of an atom. 
b)
an electron found in the innermost shell of an atom.
c)
an electron found in the middle shell.
120.
What would you name this molecule?
a)
SNa3
b)
H3O
c)
NaCl
d)
H2O
121.
What molecule is this?
a)
CO
b)
CO2
c)
C2O
d)
C2O2
122.

Which of the following substances is a compound?

a)

Co

b)

CO2

c)

O2

d)

Li

123.

The chemical formula of glucose is C6H12O6. Is glucose an element, compound, or mixture?

a)

element

b)

compound

c)

mixture

124.

Based on the Law of Conservation of Matter, describe the relationship between the mass of the reactants and the mass of the products.

a)

The mass of the products is always greater than the mass of the reactants.

b)

The mass of the reactants is less than the mass of the products.

c)

The mass of the reactants equals the mass of the products.

d)

The mass of the reactants is greater than the mass of the products.

125.

Which section represents the reactants?

a)

A

b)

B

c)

C

126.

Which section represents the products?

a)

A

b)

B

c)

C

127.

Which section represents the yield sign?

a)

A

b)

B

c)

C

128.

Why does this picture demonstrate the Law of Conservation of Mass?

a)

the number of atoms of each element are the same on both sides

b)

they start out separate and end up combined

c)

the same elements are used

d)

it doesn't demonstrate the Law of Conservation of Mass

129.

If a chemical reaction occurs in a closed system (no way for any part of the reaction to escape), how does the product mass compare to the reactant mass?

a)

the mass would decrease

b)

the mass would increase

c)

the mass would stay the same

d)

it depends on the type of reaction

130.

If a chemical reaction occurs in an open system (not contained), what might happen to the measurable mass of the products when compared to the reactants?

a)

the measurable mass might decrease because any gas produced can escape (the actual mass would stay the same)

b)

the mass would increase because mass was created

c)

the measurable mass would stay the same because nothing would be able to leave the system.

d)

it depends on the type of reaction

131.

Which picture below would correctly demonstrate the Law of Conservation of Matter if this picture is the reactants?

a)
b)
c)
d)
132.

Which of the following would represent an element?

a)
b)
c)
133.
Matter is anything that
a)
takes up space and has mass.
b)
is in our universe.
c)
is light, sound or ideas.
134.

What is the part of the chemical equation in green called?

Fe + S → FeS

a)

products

b)

reactants

c)

yield

d)

input

135.

What is the right part of a chemical equation called...

2H2 + O2 --> 2H2O

a)

Reactants

b)

Products

c)

Yields

d)

Output

136.

How many different elements are in C6H12O6?

a)

1

b)

2

c)

3

d)

4

137.

This is used to represent the number of each atom being represented.

a)

A Exponent

b)

The Coefficient

c)

A Molecule

d)

The Subscript

138.

A chemical reaction is balanced when

a)

both sides have the same elements

b)

both sides have the same number of atoms

c)

both sides have the same subscripts

d)

the molecules are the same on each side

139.

Is the following equation balanced or unbalanced?

Fe + S2 → FeS2

a)

balanced

b)

unbalanced

140.
Is this equation balanced or unbalanced? 
H2 + O2 --> H2O
a)
balanced
b)
unbalanced
141.

In a chemical reaction,

a)

the atoms of the reactants always stay together.

b)

the atoms of the reactants rearrange, to form new products.

c)

new atoms are formed when combined to make the products

d)

some atoms disappear & others multiply to form products

142.

Students want to gather evidence for the claim that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction. They decide to react vinegar and baking soda in a sealed bag. Which of the following would provide the evidence the students need?

a)

The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.

b)

Bubbles were produced during the reaction, which meant that a gas was being produced.

c)

The plastic bag did not change in any way, indicating that it was involved in the reaction.

d)

The mass of the baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.

143.
This appears on the left side of a chemical formula, and represents how many molecules there are. 
a)
An Atom
b)
The Subscript
c)
A Molecule
d)
The Coefficient
144.

Is this balanced?

2HgO → 2Hg + O2

a)

Yes

b)

No

145.
Is this balanced?
Al + O2 → 2Al2O3
a)
Yes
b)
No

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