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Topic 9 Test Review

Total questions: 60

Worksheet time: 1hrs 5mins

Name
Class
Date
1.

Burning paper is an example of a type of

a)

chemical property

b)

physical property

2.

Freezing juice to make popsciles results in a

a)

chemical change

b)

physical change

3.

When a substance changes shape or appearance but the matter remains the same

a)

chemical change

b)

physical change

4.

Which is not a physical chang

a)

boiling

b)

freezing

c)

cutting/bending

d)

crushing

e)

roasting

5.

When matter is combined and the bonds rearrange to form entirely new matter.

a)

chemical change

b)

physical change

c)

Hocus Pocus

6.

Which is not a type of chemical change

a)

change of state

b)

burning

c)

rusting

d)

tarnishing

7.

Carbon and Oxygen are the products that make carbon dioxide

a)

True

b)

False

8.

Water is the product of hydrogen and oxygen

a)

True

b)

False

9.

Rust is the result of the combination of iron and

a)

fire

b)

ice

c)

oxygen

d)

sulver

10.

The fact that matter cannot be created or destroyed is

a)

Newton's Law

b)

Low of conservation of energy

c)

Law of conservation mass

d)

Pascal's Law

11.

When there are the same number and amount of atoms on each side of an equation it is

a)

balanced

b)

math

c)

unbalanced

d)

wrong

12.
A _________________ is composed of symbols and subscripts indicating the number of atoms of an element in a compound.
a)
Chemical Equation
b)
Chemical Reaction
c)
Synthesis Reaction
d)
Chemical Notation
13.
Atoms form compounds when the compound is more ______________ than the separate atoms.  Noble gases are more _________than other elements because they have a complete outer energy level.
a)
reactive
b)
stable
c)
explosive
d)
toxic
14.
Elements that do not have full outer energy levels are more stable in __________________.
a)
bonds
b)
formulas
c)
reactions
d)
compounds
15.
Atoms gain lose, gain, or ______electrons to get a stable outer energy level.
a)
share
b)
split
c)
create
d)
destroy
16.
A ____________is the force that holds atoms together in a compound.
a)
Chemical Formula
b)
Chemical Reaction
c)
Chemical Bond
d)
Synthesis Reaction
17.
A _______ is a charged particle because it has more or fewer electrons than protons.  When an atom _____ an electron, it becomes a positively charged ion.  When an atom ____an electron, it becomes a negatively charged ion.
a)
isotope, gains, loses
b)
isotope, loses, gains
c)
ion, loses, gains
d)
ion, gains, loses
18.
An ionic compound is held together by the _______--the force of attraction between opposite charges of the atoms.
a)
Covalent Bond
b)
Ionic Bond
c)
Synthetic Bond
d)
Molecular Bond
19.
The sum of the charges on the ions in a unit of the compound is ___________. 
a)
positive
b)
negative
c)
zero
d)
±1
20.
A ________is the force of attraction between atoms sharing electrons.
a)
Synthetic Bond
b)
Ionic Bond
c)
Molecular Bond
d)
Covalent Bond
21.

Ionic bonds form between ---

a)

nonmetals.

b)

metals and nonmetals.

22.

Covalent bonds form between ---

a)

nonmetals.

b)

metals and metals

c)

metals and nonmetals

23.

What are valence electrons?

a)

sum of the protons and neutrons

b)

protons minus electrons

c)

electrons in the inner shells

d)

electrons in the outer shell

24.

Atoms that gain an electron have an electric charge of ---

a)

-1.

b)

-2.

c)

+1.

d)

+2.

25.

If an atom has 7 protons and 7 electrons, its electric charge is ---

a)

-7

b)

-14

c)

0

d)

+7

26.

Atoms form compounds to become more ---

a)

reactive

b)

stable

c)

explosive

d)

toxic

27.

An atom with a different number of electrons than it should have (more or less) is called an ---

a)

isotope

b)

valence electron

c)

ion

d)

octet

28.

Which of the following is NOT a covalent bond?

a)

K2S

b)

H2O

c)

I2

d)

CO2

29.

Which of the following is NOT an ionic bond?

a)

NH3

b)

KCl

c)

K3N

d)

NaCl

30.

Why do chemical bonds form?

a)

so the number of protons equals the number of electrons

b)

to fill the outermost electron level

c)

so an atom can become unstable

31.

According to the Octet Rule, atoms of elements react with each other in order to attain ____ electrons in their outermost energy level or shell.

a)

2

b)

4

c)

8

d)

10

32.

An atom of Neon complies with the Octet Rule because it has ___ electrons in its outer shell.

a)

10

b)

8

c)

2

d)

7

33.

An electron has a ___ charge.

a)

no charge

b)

positive

c)

negative

d)

it depends

34.

A proton has a ___ charge.

a)

positive

b)

negative

c)

no charge

d)

it depends

35.

The Law of Conservation of Matter

a)

tells how many atoms of an element are contained in one molecule or formula unit.

b)

the starting materials in a chemical reaction

c)

the new substances that are formed in a chemical reaction

d)

A law stating that atoms are not created or destroyed during a chemical reaction.

36.

Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe

a)

yes

b)

no

37.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
38.
How many Hydrogen are in 4H2O?
a)
6
b)
8
c)
2
d)
4
39.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
40.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
41.
How many Mn atoms are found in the following compound?
3Cr(MnO4)6
a)
3
b)
4
c)
6
d)
18
42.
How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl2 + H2
a)
1
b)
2
c)
3
d)
4
43.
Balance this equation:
 2Li + Cl2 -> LiCl
a)
2Li + Cl2 -> 4LiCl2
b)
2Li + Cl2 -> LiCl2
c)
2Li + Cl2 -> 2LiCl
44.
Name the part in red:

H2 + O2 -> H2O
a)
Coefficient
b)
Product
c)
Yield
d)
Subscript
45.
Is the following equation balanced or unbalanced ? 
Al + O2 --> Al2O3
a)
Balanced
b)
Unbalanced
46.

Which of the coefficients could be used to balance this equation?

__Ag2O →__ Ag +___O2

a)

2,4,1

b)

1,1,1

c)

2,1,2

d)

2,2,2

47.
Which problem is balanced?
(Check ALL answers)
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
48.
Which of the following equations are correctly balanced?
a)
12CO2 +H2O --> C6H12O6 + O2
b)
CO2 + 9H2O --> C6H12O6 + O2
c)
CO2 + H2O --> 3C6H12O6 + O2
d)
6CO2 + 6H2O --> C6H12O6 + 6O2
49.

Balance the following equation:

___ SeCl6+ ___ O2→___ SeO2+____Cl2

a)

1, 1, 1, 3

b)

2, 1, 2, 1

c)

1, 2, 1, 2

d)

2, 2, 2, 4

50.
Balance this equation
_N2 + _H2 --> _NH3
a)
1,2,3
b)
1,3,2
c)
1,1,2
d)
2,1,1
51.
Balance this equation:
P4+O2  -->  P2O3
a)
3 P4+ O2 --> 2 P2O3
b)
 P4+ O2 --> 2 P2O3
c)
 P4+ 3 O2 --> 2 P2O3
d)
 P4+ 2 O2 --> 3 P2O3
52.
Balance this equation...
HgO --> 2Hg + O2
a)
It is balanced 
b)
2HgO --> Hg + O2
c)
2HgO --> 2Hg + O2
d)
I don't know...Oh well!
53.
Balance this equation...
H2 + Cl2 --> HCl
a)
It is balanced 
b)
3H2 + Cl2 --> 6H2Cl
c)
H2 + Cl2 --> 2HCl
d)
I don't know! Oh well.
54.
Which of the following is an unbalanced equation?
a)
CaCO3 --> CaO + CO2
b)
PbO2 + 2H2-->2Pb + H2O
c)
2Na+ 2H2O-->2NaOH + H2
d)
CS2 + 2O2 --> CO2 + 2SO2
55.
What is the total number of atoms present in 5Na3PO4
a)
5
b)
40
c)
55
d)
8
56.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
57.
What is the number before a chemical formula called?
Ex: 2H2 + O2 --> 2H2O
a)
Coefficient
b)
Subscript
c)
Atom
d)
Equation
58.
How many aluminum atoms are in Al2(SO4)3?
a)
1
b)
2
c)
3
d)
4
59.
Is the following equation balanced?
4Fe + 3O2 --> 2Fe2O3
a)
yes
b)
no
60.
Is the following reaction balanced?
NaHCO3 --> Na2CO3 + H2O + CO2
a)
yes
b)
no

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