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Worksheets

Yr9 chemistry

Total questions: 225

Worksheet time: 4hrs 10mins

Name
Class
Date
1.

An electron is

a)

positively charged

b)

neutral

c)

negatively charged

d)

cannot be determined

2.

The atomic number of an element is

a)

the number of protons

b)

the number of electrons

c)

the number of neutrons

d)

the location of an atom on the periodic table

3.

The atomic mass of an element is the number of

a)

protons and neutrons in the nucleus of an atom

b)

protons and electrons in the nucleus of an atom

c)

neutrons and electrons in the nucleus of an atom

d)

protons subtracted from the number of neutrons

4.

Conservation of mass means

a)

all the atoms present before a chemical reaction are not present after

b)

atoms present before chemical reactions are present after

c)

new substances and new elements are formed in a chemical reaction

d)

students should not add anything to the test tube during the experiment

5.

A molecule is

a)

a singular particle of a particular element

b)

another name for an element

c)

2 or more atoms that are combined

d)

a small piece of DNA

6.

The type of reaction that releases energy as heat is called

a)

endothermic

b)

exothermic

c)

respiration

d)

photosynthesis

7.
The group number tells us how many _________ there are in an element.
a)
groups
b)
valence electrons
c)
energy levels
d)
chemicals
8.
The inner energy level can only hold ______ electrons.
a)
1
b)
0
c)
2
d)
18
9.
Most of the mass in an atom is made up of _____________________?
a)
protons and electrons
b)
protons and neutrons
c)
neutrons and electrons
d)
electrons and quarks
10.

Neutrons

a)

no charge, shells

b)

positive charge, nucleus

c)

neutral, no charge, nucleus

d)

negative charge, shells

11.

The second shell of an atom holds

a)

2 electrons

b)

8 electrons

c)

18 electrons

d)

32 electrons

12.
How many valence electrons are represented here?
a)
7
b)
5
c)
2
d)
8
13.
What is the electron configuration of calcium?
a)
2.8.8.2
b)
2.8.10
c)
20
d)
2.18.2
14.
Atoms of the same element with a different number of neutrons
a)
Ion
b)
Gluons
c)
Isotope
d)
Quarks
15.

What is a charged atom known as?

a)

an ion

b)

an isotope

c)

an electron cloud

d)

a quark

16.

The number in the upper corner of an element tile of the periodic table is called?

a)

the proton number

b)

the atomic number

c)

the electron number

d)

the mass number

17.

If an atom contains exactly three protons, then it's an atom of?

a)

lithium

b)

gold

c)

nitrogen

d)

carbon

18.

The atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons is?

a)

9

b)

10

c)

19

d)

28

19.
An element with a mass number of 11 and an atomic number of 5 has how many neutrons?
a)
11
b)
5
c)
6
d)
16
20.
What is the atomic number of the atom pictured? 
a)
9
b)
10
c)
18
d)
19
21.

Each column of the periodic table is

a)

an element.

b)

a group.

c)

an isotope.

d)

a period.

22.

The order of elements in the modern periodic table is based on an element's

a)

atomic number.

b)

name.

c)

chemical symbol.

d)

atomic mass.

23.

Which of the following groups on the Periodic Table is likely to form positively charged ions (or cations)?

a)

group 1

b)

group 13

c)

group 17

d)

group 18

24.

Based on its location on the periodic table, which of these elements most likely has physical and chemical properties most similar to boron (B)?

a)

magnesium (Mg)

b)

aluminum (Al)

c)

neon (Ne)

d)

chlorine (Cl)

25.
How do the following two elements bond together?
Al3+  O2-         
a)
AlO
b)
Al2O3
c)
Al3O6
d)
Al3O2
26.
If my charge becomes 2+ what does that say about me?
a)
I am stealing 2 electrons
b)
I am losing 2 electrons
c)
I am in period 2
d)
I have an atomic # of 2
27.
The oxidation number for Fe in Fe2O3:
a)
+2
b)
+3
c)
+1
d)
-2
28.

Metals tend to

a)

gain electrons

b)

lose electrons

c)

lose neutrons

d)

gain protons

29.

When metals bond with non-metals they form what type of bonds?

a)

covalent

b)

ionic

c)

cooperative

d)

lewis

30.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
31.
Metals tend to 
a)
gain electrons
b)
lose electrons
32.
Nonmetals tend to 
a)
gain electrons
b)
lose electrons
33.
If I gain electrons I become
a)
Positive because I've added to my atom
b)
negative because I've added electrons
c)
same because i'm balanced
d)
equal because now I have electrons
34.
When metals bond with non-metals they form what type of bonds
a)
covalent
b)
ionic
c)
cooperative
d)
lewis
35.
How do the following two elements bond together?
Cr3+  O2-         
a)
CrO
b)
Cr3O2
c)
Cr2O3
d)
CrO3
36.
PbS2
a)
lead sulfide
b)
lead sulfur
c)
lead II sulfide
d)
lead IV sulfide
37.
AgF
a)
silver fluoride
b)
silver fluorine
c)
monosilver monofluoride
d)
silver monofluorine
38.
When a nonmetal gains electrons, it becomes this type of ion.
a)
Anion
b)
Cation
39.
When a metal loses electrons, it becomes this type of ion.
a)
anion
b)
cation
40.
The proper formula for magnesium hydroxide:
a)
MgOH
b)
Mg2OH
c)
Mg(OH)2
d)
Mg2OH2
41.
How many valence electrons does a bromine atom have?
a)
1
b)
2
c)
6
d)
7
42.
What is the correct formula for the compound, lithium oxide?
a)
LiO
b)
Li2O
c)
LiO2
d)
Li2O2
43.
Smallest unit of an element
a)
compound
b)
atom
c)
molecule
d)
product
44.
Smallest unit of a compound
a)
atom
b)
density
c)
element
d)
molecule
45.
Substance made up of chemically combined elements
a)
atom
b)
element
c)
electron
d)
compound
46.
Number placed in front of a chemical formula
a)
product
b)
coefficient
c)
reactant
d)
subscript
47.
Number written below & to the right of a chemical symbol
a)
subscript
b)
reactant
c)
product
d)
coefficient
48.
Highly reactive metals in first column of periodic table
a)
halogens
b)
noble gases
c)
alkali metals
d)
metalloids
49.
Highly reactive non-metals in second to last column on periodic table
a)
noble gases
b)
metalloids
c)
alkali metals
d)
halogens
50.
Electrons in the outermost orbit or shell
a)
quarks
b)
molecules
c)
valence
d)
compounds
51.
How many iron atoms are in 
Fe(NO3)2
a)
1
b)
2
c)
3
d)
6
52.
How many nitrogen atoms are in 
Fe(NO3)2
a)
1
b)
2
c)
3
d)
6
53.
How many oxygen atoms are in 
Fe(NO3)2
a)
1
b)
2
c)
3
d)
6
54.

How many oxygen atoms are in the products for the chemical reaction below?
 4Fe + 3O2 → 2Fe2O34Fe\ +\ 3O_{2\ }\rightarrow\ 2Fe_2O_3  

a)

2

b)

3

c)

5

d)

6

55.

What do we call the chemicals that result from a chemical reaction?

a)

reactants

b)

products

c)

subscripts

d)

coefficients

56.

The Law of Conservation of Mass says that matter can neither be __________ or __________.

a)

created; destroyed

b)

recycled; renewed

c)

subtracted; added

d)

joined; separated

57.

The Law of Conservation of Mass says that matter can neither be __________ or __________.

a)

created; destroyed

b)

recycled; renewed

c)

subtracted; added

d)

joined; separated

58.

The Law of Conservation of Mass says that matter can neither be __________ or __________.

a)

created; destroyed

b)

recycled; renewed

c)

subtracted; added

d)

joined; separated

59.

The Law of Conservation of Mass says that matter can neither be __________ or __________.

a)

created; destroyed

b)

recycled; renewed

c)

subtracted; added

d)

joined; separated

60.

The Law of Conservation of Mass says that matter can neither be __________ or __________.

a)

created; destroyed

b)

recycled; renewed

c)

subtracted; added

d)

joined; separated

61.

How many atoms are in the products below?
 4Fe +3O2 → 2Fe2O34Fe\ +3O_{2\ }\rightarrow\ 2Fe_2O_3  

a)

7

b)

10

c)

17

d)

20

62.

According to the Law of Conservation of Mass, what happens to the wood and oxygen when it is burned?

a)

The wood disappears.

b)

It stays the same chemically.

c)

The atoms in the wood and oxygen rearrange and form smoke and ash.

d)

Nothing.

63.
Substances present at the start of a chemical reaction
a)
subscripts
b)
coefficients
c)
reactants
d)
products
64.
A 55-gram egg is placed in a pot. After the egg is boiled, which is most likely the mass of the egg?
a)
50 
b)
55 
65.
What does the principle of conservation of mass mean?
a)
The total mass of the reactants is more than the products
b)
Matter is not created or destroyed
c)
The total mass of the reactants is less than the products
66.
In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 
a)
4g
b)
5g
c)
9g
d)
14g
67.
Is this equation balanced or unbalanced? 
H2 + O2 --> H2O
a)
balanced
b)
unbalanced
68.
12g of Carbon react with 16g of Oxygen, how much carbon monoxide (CO) is formed? 
a)
28 g
b)
4g
c)
30g
d)
12g
69.

When sodium and chlorine combine to form sodium chloride, sodium chloride is the:

a)

Originator

b)

Reactant

c)

Product

d)

Produce

70.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
71.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
72.

How many Hydrogen atoms are in 4H2O?

a)

6

b)

8

c)

2

d)

4

73.
CaCO3 ----> CaO + CO2
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
74.
2 AgNO3 + Cu ----> Cu(NO3)2 + 2 Ag
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
75.
2 C5H5 + Fe ----> Fe(C5H5)2
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
76.
O3  ----> O. + O2
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
77.
2 NO2 ----> 2 O2 + N2
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
78.
CxHy +O2 --> H2O + CO2
a)
Decomposition
b)
Double replacement
c)
Combustion
d)
Single Replacement
79.
One reactant into several products.
a)
Decomposition
b)
Synthesis
c)
Combustion
d)
Single Replacement
80.
What is the left part of a chemical equation called?
H2 + O → H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
81.

Combustion reactions will always involve

a)

Oxygen and a solid

b)

Liquid nitrogen and heat

c)

Oxygen and heat/energy

d)

CO and H2O

82.
Combining a substance with oxygen
a)
Displacement
b)
Synthesis
c)
Decomposition
d)
Oxidation
83.
Switching one substance for another
a)
Displacement
b)
Synthesis
c)
Decomposition
d)
Oxidation
84.
What type of reaction is the equation 2NaCl →2Na +Cl2?
a)
Synthesis Reaction
b)
Decomposition Reaction
c)
Single Displacement Reaction
d)
Double Displacement Reaction
85.
Consider the equation 4 Fe+3 O2 → 2 Fe2O3 . In this equation, 3 O2 is a
a)
product
b)
reactant
c)
compound
86.
Which of the following is an example of a physical change to matter?
a)
rusting
b)
digestion
c)
freezing
87.
Photosynthesis is a chemical reaction that involves the production of glucose (sugar) from carbon dioxide and water in the presence of sunlight. Photosynthesis is what kind of reaction?
a)
Exothermic
b)
Endothermic
c)
Decomposition
88.
During an endothermic reaction, what happens to energy in relation to the surroundings?
a)
released to
b)
absorbed from
c)
 mixed with
89.
During an exothermic reaction, what happens to energy in relation to the surroundings?
a)
released to
b)
absorbed from
c)
 mixed with
90.
In a cold pack, which type of reaction draws heat from the surroundings?
a)
exothermic
b)
endothermic
c)
exergonic
91.
Which generalized equation represents a decomposition reaction?
a)
A + BC → AC+ B
b)
A + B → AB
c)
AB → A + B
92.

What reaction has the following general formula:

AB --> A + B

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

93.
Mg2+ and Cl- create...
a)
Mg2Cl
b)
MgCl2
c)
Mg2Cl2
d)
MgCl
94.
Ca2+ and N3- create...
a)
Ca2N3
b)
Ca3N2
c)
CaN3
d)
Ca2N
95.

Na+ and Cl- create...

a)

Na2Cl

b)

NaCl2

c)

Na2Cl2

d)

NaCl

96.

Potassium and Sulfur create...

a)

KS

b)

KS2

c)

K2S

d)

K2S2

97.

The formula of calcium and phosphate is

a)

CaPO4

b)

Ca2(PO4)3

c)

Ca3PO4

d)

Ca3(PO4)2

98.

The chemical formula of Iron (III) and bromine is

a)

FeBr

b)

Fe(III)Br

c)

FeBr₃

d)

Fe₂Br₃

99.
Fe +2  and  SO4 -2
a)
FeSO4
b)
Fe4(SO4)2
c)
FeSO2
d)
correct answer is not given
100.
Ca +2  and  OH -
a)
Ca2OH
b)
CaOH2
c)
Ca(OH)2
d)
correct answer is not given
101.
Be careful with this question.....
SO4 -2  and  Al +3
a)
(SO4)3Al2
b)
(SO4)2Al3
c)
Al3SO4
d)
Al2(SO4)3
102.

What is the formula for copper(I) and sulfate?

a)

CuSO3

b)

CuSO4

c)

Cu2SO3

d)

Cu2SO4

103.
The formula of this atom when it becomes an ion would be
a)
N-2
b)
N+3
c)
N-3
d)
N+2
104.
A negatively-charged ion.
a)
atom
b)
cation
c)
anion
d)
electron
105.
An atom that has lost or gained electrons; an atom with a charge.
a)
cation
b)
anion
c)
isotope
d)
ion
106.
Cations are
a)
positive
b)
negative
c)
on the right side of the periodic table.
d)
nonmetals
107.
Na +  and  S -2
a)
Na2S
b)
NaS2
c)
Na2S2
d)
NaS
108.
The chemical formula for an ionic compound of potassium and oxygen is
a)
KO.
b)
K2O.
c)
K2O2.
d)
KO2.
109.
What is the charge of an atom that has lost one electron?
a)
-1
b)
-2
c)
+1
d)
+2
110.
When naming ionic compounds, the cation is always named first and the anion is always named second.
a)
False
b)
True
111.
Which of the following will form an ion with a 2- charge?
a)
Ca
b)
Se
c)
Ge
d)
N
112.
How do the following two elements bond together?
Al3+  O2-         
a)
AlO
b)
Al2O3
c)
Al3O6
d)
Al3O2
113.
What charge does a calcium (Ca) ion have?
a)
+1
b)
+2
c)
+3
d)
+4
114.

Identify the A group number to which element X belongs to in the following ionic compound MgX

a)

Group 7A

b)

Group 6A

c)

Group 2A

d)

Group 1A

115.

Identify the A group number to which element X belongs to in the following ionic compound Li2X

a)

Group 6A

b)

Group 7A

c)

Group 3A

d)

Group 2A

116.

Identify the A group number to which element X belongs to in the following ionic compound X2N3

a)

Group 3A

b)

Group 6A

c)

Group 4A

d)

Group 7A

117.

What is the correct name of this formula?

a)

Sodium Chloride

b)

Potassium Chloride

c)

Potassium Chlorate

d)

Potassium Carbide

118.

What is the correct name for the formula?

a)

Aluminium Oxide

b)

Aluminium Carbide

c)

Lithium Oxide

d)

Oxygen Alminide

119.

What is the correct name for the formula?

a)

Magnesium Sulfur

b)

Magnesium Sulfide

c)

Magnesium Sulfate

d)

Magnet Sulfur

120.

What is the correct formula for Sodium Oxide?

a)

Na2O

b)

NaO

c)

O2Na

d)

Na2O2

121.

What is the correct formula for Lithium oxide?

a)

LiO

b)

OLi2

c)

Li2O

d)

Li2O3

122.

What is the correct formula for Calcium Chloride?

a)

CaCl

b)

ClCa

c)

Ca2Cl2

d)

CaCl2

123.

Is KCl correct?

a)

Yes

b)

No

124.

Is NaLi correct?

a)

Yes

b)

No

125.

Which symbol shows a chemical reaction has occured?

a)

A

b)

B

c)

C

d)

D

126.

Identify the product(s) in this word equation

a)

Sodium

b)

Sodium chloride

c)

Sodium and Chlorine

d)

Sodium and sodium chloride

127.

The new substances formed in a chemical reaction are called

a)

Reactants

b)

Atoms

c)

Products

d)

Reagents

128.

What are the reactants in this word equation?

a)

Carbon dioxide and oxygen

b)

Carbon dioxide and water

c)

Oxygen and glucose

d)

Oxygen and water

129.

In a chemical reaction...

a)

New atoms are created

b)

Atoms rearrange

c)

Atoms are destroyed

d)

Nothing Happens

130.

Magneisum reacts with oxygen to form magnesium oxide. The correct word equation is...

a)

A

b)

B

c)

C

d)

D

131.

Magnesium can be burned in oxygen to produce solid magnesium oxide.

a)

Mg + O2→ MgO

b)

Mg+ O→ MgO

c)

Mg + CO2 → MgO + C

d)

Mg + O2→ Mg2O2

132.

Sodium reacts with chlorine gas to produce sodium chloride.

a)

NaCl→ Cl + Na

b)

Na+ CO2 → NaCO2

c)

Na + Cl2→ NaCl

d)

Na + Cl → NaCl

133.

sodium phosphate and calcium chloride produce calcium phosphate and sodium chloride

a)

Na3PO4 + CaCl2 --> Ca3(PO4)2 + NaCl

b)

Na3PO4 + CaCl2 --> Ca4PO2 + NaCl

c)

NaPO4 + CaCl2 --> Ca(PO4)2 + NaCl

d)

NaPO4 + CaCl2 --> Ca2(PO4)3 + NaCl

134.

Aluminum and oxygen produces aluminum oxide

a)

Al + O2 --> Al2O3

b)

Al + O --> Al2O3

c)

Al3 + O2 --> Al2O3

d)

Al + O --> AlO

135.

What are the products when nitric acid reacts with lithium?

a)

lithium nitrate + hydrogen gas

b)

lithium nitric + hydrogen gas

c)

lithium nitrate + water

d)

lithium nitric + water

136.

What are the products when sulfuric acid reacts with calcium carbonate?

a)

calcium sulfur + water + carbon dioxide

b)

calcium sulfur+ carbon dioxide

c)

calcium sulfate + water + carbon dioxide

d)

calcium sulfate + carbon dioxide

137.

What are the products formed when hydrochloric acid reacts with sodium hydroxide?

a)

sodium chloride and hydrogen

b)

sodium chloride and water

c)

sodium chloric and water

d)

chloride sodium and water

138.

What can X be?


sulfuric acid + X --> magnesium sulfate and water

a)

magnesium

b)

magnesium oxide

c)

magnesium chloride

d)

magnesium ammonium

139.

What is the gas produce when nitric acid is added to calcium?

a)

oxygen

b)

hydrogen

c)

carbon dioxide

d)

ammonia

140.

Which of the following with react with hydrochloric acid to produce calcium chloride, water and carbon dioxide?

a)

calcium

b)

calcium nitrate

c)

calcium oxide

d)

calcium carbonate

141.
When a CHEMICAL reaction occurs, what is made?
a)
No new substance is made.
b)
A new substance is made with new atoms formed
c)
A new substance is made, with existing atoms rearranged
d)
All substances remain the same, but physical state may change.
142.

Magnesium + hydrochloric acid --> _____________ + hydrogen


What is missing?

a)

Magnesium oxide

b)

Magnesium hydride

c)

Magnesium chloride

d)

Magnesium hydroxide

143.

Iron + ________________ --> iron sulphate + copper


What is missing?

a)

Copper oxide

b)

Copper sulphate

c)

Iron sulphate

d)

Iron oxide

144.

Magnesium + ________ --> magnesium oxide


What is missing?

a)

Hydrogen

b)

Sulphur

c)

Oxygen

d)

Oxide

145.

Potassium iodide + lead nitrate --> _____________ + lead iodide


What is missing?

a)

lead nitrate

b)

potassium nitrate

c)

nitrogen

d)

potassium iodide

146.

Copper oxide + _______________ -> copper sulphate + water


What is missing?

a)

sulphuric acid

b)

hydrochloric acid

c)

hydrogen

d)

oxygen

147.

________________ --> copper oxide + carbon dioxide


What is missing?

a)

copper sulphate

b)

copper nitrate

c)

copper carbonate

d)

copper hydroxide

148.

Sodium + chlorine

a)

sodium chloride

b)

sodium hydroxide

c)

sodium oxide

d)

sodium

149.
When a CHEMICAL reaction occurs, what is made?
a)
No new substance is made.
b)
A new substance is made with new atoms formed
c)
A new substance is made, with existing atoms rearranged
d)
All substances remain the same, but physical state may change.
150.
What does this word equation represent: Iron + oxygen → Iron oxide
a)
A physical change in iron (nothing new gets made)
b)
A chemical reactino between iron and oxygen, where rust (iron oxide) is produced
c)
A chemical reaction between iron and rust, where oxygen is produced
d)
A physical change between iron and oxygen that forms a red color
151.
Magnesium can be burned in air to produce solid magnesium oxide.
a)
2Mg(s) + O2(g)→ 2MgO(s)
b)
Mg(s) + O(g) → MgO(s)
c)
2Mg(s) + CO2(g) → 2MgO(s) + C(s)
d)
2Mg(s) + O2(g) → Mg2O2(s)
152.
Sodium reacts with chlorine to produce sodium chloride.
a)
NaCl(s) → Cl(g) + Na(s)
b)
Na(s) + CO2(g) → NaCO2(s)
c)
2Na(s) + Cl2(g) → 2NaCl(s)
d)
Na(s) + Cl(g) → NaCl
153.
Iron reacts with sulfur to produce iron(II) sulfide powder.
a)
2Fe(s) + S(s) → Fe2S(s)
b)
Fe(s) + S(s) → FeS(s)
c)
Fe(s) + S(g) → FeS(s)
d)
4Fe(s) + S2(g) → 2Fe2S
154.
When lead reacts with oxygen, a yellow lead(II) oxide powder is produced.
a)
2Pb(s) + O2(g) → 2PbO(s)
b)
Pb(s) + O2(g) → PbO2(aq)
c)
4Pb(s) + O2(g) → 2Pb2O(g)
d)
Pb(s) + O(g) → PbO(s)
155.
In this image, what are the information in red is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
d)
Coefficient
156.
In this image, what are the information to the right of the arrow (in black) is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
157.
The law of conservation of mass states that....
a)
Matter can be made
b)
Matter can be destroyed
c)
Matter can neither be made or destroyed
d)
Matter can evaporate
158.
Is this balanced?...
Al + O2 --> 2Al2O3
a)
Yes!
b)
NO!
159.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
160.
Why is the following chemical equation not balanced?
H2 + O2 --> H2O
a)
each side of the equation has a different number of oxygen atoms
b)
each side of the equation has a different number of hydrogen atoms
c)
each side has the same mass
161.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
162.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
163.
Is the following equation balanced or unbalanced?
Fe + S --> FeS
a)
balanced
b)
unbalanced
164.
What coefficient should be used to make the following equation balanced?
N2+O2--> _NO 
a)
1
b)
2
c)
3
d)
4
165.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
166.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
167.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
168.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
169.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
170.
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.
171.
Which of the following reactions is balanced?
a)
2CH4 + O2 -> CO2 + H2O
b)
CH4 + 2O2 -> CO2 + H2O
c)
CH4 + 2O2 -> CO2 + 2H2O
d)
None of the chemical equations are balanced.
172.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
173.
Balance this equation.
_CF4 + _Br2 -- _CBr4 + _F2
a)
2,1,2,1
b)
1,2,2,1
c)
1,2,1,2
d)
2,2,2,2
174.
Balance this equation.
_CH4 + _O2 --> _CO2 + _H2O
a)
1,2,1,1
b)
2,1,2,1
c)
1,2,1,2
d)
0,2,0,2
175.
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
176.
Identify the reactant(s) and product(s) of the reaction.
a)
All three are reactants and none are products.
b)
Hydrogen and water are the reactants, and oxygen is the product.
c)
Water and oxygen are the reactants, and hydrogen is the product.
d)
Hydrogen and oxygen are the reactants, and water is the product.
177.

Which is the Law of Conservation of Matter?

a)

matter cannot be created or destroyed, it only rearranges

b)

matter can be created but it cannot be destroyed, it never rearranges

c)

matter can be destroyed but it cannot be created, it usually just rearranges

d)

matter is an unproven theory created by Hans Geiger

178.
Which one is a compound?
a)
Co
b)
Br
c)
Fe
d)
CO
179.
Which one is an element?
a)
Co
b)
CO
c)
CO2
d)
CO3-2
180.
How many elements are found in the following molecule? Mg(ClO3)2
a)
1
b)
4
c)
3
d)
5
181.
Which number should go in the blank?
_ H2 + O2 -> 2 H2O
a)
1
b)
2
c)
3
d)
0
182.
Which number should go in the blank?
2 Na+ _ Cl2 -> 2 NaCl
a)
1
b)
2
c)
3
d)
0
183.

Which of the following elements will form a cation?

a)

Arsenic

b)

Copper

c)

Bromine

d)

Fluorine

184.

Which of the following will form an anion?

a)

Titanium

b)

Iron

c)

Calcium

d)

Sulfur

185.

Which of the following will form a cation?

a)

Aluminum

b)

Sulfur

c)

Iodine

d)

Nitrogen

186.

Which of the following will form an anion?

a)

Tin

b)

Lead

c)

Chlorine

d)

Zinc

187.

Which of the following will form a cation?

a)

Barium

b)

Phosphorous

c)

Tellurium

d)

Selenium

188.

Which of the following elements will form an anion?

a)

Calcium

b)

Cobalt

c)

Nickel

d)

Iodine

189.

Which of the following will form a cation?

a)

Tellurium

b)

Iodine

c)

Nitrogen

d)

Nickel

190.

Which of the following will form an anion?

a)

Oxygen

b)

Cobalt

c)

Strontium

d)

Cesium

191.

What is a cation's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element

192.

What is a cation's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element

193.

What is a cation's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element

194.

What is a cation's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element

195.

What is an anion's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element's charge

196.

What is an anion's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element's charge

197.

What is an anion's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element's charge

198.

What is an anion's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element's charge

199.

What is an anion's charge?

a)

positive

b)

negative

c)

neutral

d)

depends on the element's charge

200.

Is potassium a cation or an anion?

a)

cation

b)

anion

201.

Identify the compound if hydrogen and chlorine are chemically combined.

a)

HCl

b)

HCl7

c)

H1Cl1

d)

H1Cl7

202.
In an atom, what is the number of protons equal to?
a)
The number of electrons
b)
The number of molecules
c)
The number of neutrons
d)
The number of nucleii
203.

How many Hydrogen atoms are in 4H2O?

a)

6

b)

8

c)

2

d)

4

204.

How many atoms are there TOTAL in H2SO4 ?

a)

6

b)

5

c)

7

d)

3

205.

How many Nitrogen atoms are in the in H2C3O4N5?

a)

2

b)

3

c)

4

d)

5

206.

How many Aluminum atoms are in Al2O3?

a)

3

b)

2

c)

5

d)

1

207.

How many Nitrogen atoms are in the in H2C3O4N5?

a)

2

b)

3

c)

4

d)

5

208.

How many atoms are present if there is no subscript following the element symbol?

a)

0

b)

2

c)

only 1

d)

1 million

209.
TRUE OR FALSE:
Every compound is a molecule but not every molecule is a compound.
a)
TRUE
b)
FALSE
210.

What is the picture displayed?

a)

atom

b)

element

c)

molecule

d)

compound

211.

What is the picture displayed?

a)

atom

b)

element

c)

molecule

d)

compound

212.

How many ELEMENTS are in C6H12O6?

a)

1

b)

12

c)

3

d)

6

213.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
214.

Describe this

a)

one compound

b)

two compounds

c)

pure elements

d)

mixture of pure elements

215.

Which of these is NOT a sign of a chemical change?

a)
b)
c)
d)
216.

How many Oxygen atoms are in H2O?

a)

1

b)

2

c)

0

d)

4

217.

How many Magnesium atoms are in 10MgCl2?

a)

10

b)

5

c)

20

218.

How many atoms are there TOTAL in H2SO4 ?

a)

6

b)

5

c)

7

d)

3

219.

How many Sodium atoms are in 6NaCl?

a)

1

b)

12

c)

6

220.

How many Nitrogen atoms are in (NH₄)₂CrO₄?

a)

1

b)

2

c)

8

d)

16

221.

What is C2H8O ?

a)

Element

b)

Letters

c)

Numbers

d)

Compound

222.

How many Oxygen atoms are in Al₂(SO₄)₃?

a)

4

b)

12

c)

7

d)

24

223.

How many Hydrogen atoms in 3(NH₄)₂CrO₄?

a)

4

b)

2

c)

8

d)

24

224.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
225.

How many elements are present in this compound? (Careful!)

Mg2As3COHNi2

a)

2

b)

4

c)

6

d)

10