Free Printable Chemical Bonds, Equations, & Reactions

1.

When chemical bonds between atoms or molecules are formed or broken they cause a . . .

a)

Physical Change

b)

Chemical Change

c)

Problem

2.

The arrow in a chemical equation should be read as . . .

a)

"yields"

b)

"slow down"

c)

"goes to"

d)

"next"

3.

At the end of a chemical reaction, the reactants and the _________ must be balanced.

a)

products

b)

subscripts

c)

ingredients

4.

The "Law of Conservation of ______" states that matter can neither be created nor destroyed.

a)

Energy

b)

Mass

c)

Motion

d)

Heat

5.

If 2 Hydrogen's go into the reaction, it is okay if only 1 comes out.

a)

TRUE

b)

FALSE

6.

The BIG number in front of a molecule is called the ____________.

a)

Reactant

b)

Superscript

c)

Subscript

d)

Coefficient

7.

It is okay to change the little subscript numbers when balancing an equation.

a)

TRUE

b)

FALSE

8.

How many atoms of Chlorine (Cl) are there in 5HCl₂?

a)

5

b)

2

c)

10

d)

7

9.

How many molecules of water are there in 6H₂O?

a)

2

b)

6

c)

12

d)

8

10.

How many atoms of Nitrogen are in 3NH₄?

a)

3

b)

4

c)

12

d)

7

11.

Is this equation balanced?

a)

yes

b)

no

c)

Not enough information

12.

When balanced, the correct coefficients for the equation are:

a)

2, 1, 3, 1

b)

1, 2, 1, 2

c)

1, 2, 2, 1

d)

2, 1, 1, 2

13.

Is the chemical equation here balanced?

a)

Yes

b)

No

14.

Is this equation balanced?

a)

yes

b)

no

c)

Not enough information

15.

Rule #1 for Balancing Equations states that you can ONLY add _______ when balancing equations.

a)

Subscripts

b)

Coefficients

c)

Products

16.

According to Rule #2 for balancing equations, is this okay? Na4Cl

a)

Yes, that is fine.

b)

No, it should be Na4Cl4

c)

No, it should be 4NaCl

17.

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

18.

Rule #3 for balancing equations says that it is okay to add numbers wherever you want to when balancing equations.

a)

TRUE

b)

FALSE

19.

Pick the two numbers that you would have to use to balance this equation:

H₂O₊O_{2 -->}H₂O₂

a)

1

b)

2

c)

3

d)

4

20.

Why do elements bond?

a)

To be friends

b)

To create a new element

c)

To become stable

21.

How are covalent bonds formed?

a)

Sharing of electrons

b)

Transfer of electrons

22.

How are ionic bonds formed?

a)

Transfer of electrons

b)

Sharing of electrons

23.

Atoms are most stable when their outer shell is complete.

a)

true

b)

false

24.

Noble gases will form chemical bonds with other elements

a)

True

b)

False

c)

Sometimes

25.

Why do elements bond?

a)

To be friends

b)

To create a new element

c)

To become stable

d)

To get bigger

26.

What is a valence electron?

a)

The sum of neutrons and protons.

b)

The # of electrons in the last shell.

c)

A type of bond.

d)

A popular compound.

27.

The octet rules states that most elements want to have _____ valence electrons.

a)

2

b)

4

c)

6

d)

8

28.

How many valence electrons does Oxygen (O) have?

a)

6

b)

8

c)

15

d)

16

29.

Force of attraction between atoms or ions.

a)

Mixture

b)

Compound

c)

Chemical Bond

d)

Formula

30.

What two types of atoms make a covalent bond?

a)

2 nonmetals

b)

2 metals

c)

1 metal and 1 nonmetal`

31.

What happens to electrons in a covalent bond?

a)

they are shared

b)

they are transferred

c)

they are negative

32.

Ionic bonds are between

a)

metals and nonmetals

b)

2 metals

c)

2 nonmetals

33.

What type of bonding does this picture show?

a)

Ionic

b)

Covalent

34.

Carbon and Oxygen will make a ___________ bond.

a)

ionic

b)

covalent

c)

metallic

35.

Sodium and Bromine will make a _____ bond.

a)

ionic

b)

covalent

c)

metallic

36.

When electrons are lost by one atom and gained by another, so that they both get full outer shells.

a)

Covalent bond

b)

Ionic bond

c)

Pairing

d)

Compound

37.

Where are the nonmetals located on the periodic table?

a)

Blue

b)

Red

c)

Green

38.

Why don't noble gases form bonds?

a)

They all have a full octet

b)

Noble gases do form bonds

c)

They only bond when with eachother

d)

none of these answers are correct

39.

During a chemical reaction, atoms can

a)

be destroyed to form a new substance

b)

be created to form a new substance

c)

be rearranged to form a new substance

40.

What is a coefficient?

a)

Number behind molecule (does not apply)

b)

Number in front of molecule (applies to whole thing)

c)

Applies to the element it follows

41.

We balance equations to show...

a)

Change

b)

Reactants

c)

Products

d)

Conservation of mass

42.

Subscripts apply to

a)

The whole reaction

b)

The individual element

c)

The product side

d)

The reactant side

43.

What happens in a chemical reaction?

a)

Bonds between atoms break and/or are formed

b)

New atoms are created and/or removed

c)

Protons move from one atom to another

d)

Electrons change into protons

44.

What reaction has the following general formula:

AB --> A + B

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

45.

What reaction has the following general formula:

A + CD --> C + AD

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

46.

What reaction has the following general formula:

AB + CD --> CB + AD

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

47.

What reaction has the following general formula:

A + B --> AB

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

48.

What reaction has the following general formula:
$C_xH_y\ +\ O_2\ ->CO_{2\ }+\ H_2O$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

49.

What is the general reaction scheme for a single replacement reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

$C_xH_y+O_2\ ->\ CO_2+H_2O$

50.

What is the general reaction scheme for a combustion reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

$C_xH_y+O_2\ ->\ CO_2+H_2O$

51.

What is the general reaction scheme for a combination reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

$C_xH_y+O_2\ ->\ CO_2+H_2O$

52.

What is the general reaction scheme for a double replacement reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

$C_xH_y+O_2\ ->\ CO_2+H_2O$

53.

What is the general reaction scheme for a decomposition reaction?

a)

A + B --> AB

b)

AB --> A + B

c)

A + CD --> C + AD

d)

AB + CD --> CB + AD

e)

$C_xH_y+O_2\ ->\ CO_2+H_2O$

54.

What type of reaction is the following:
$2H_2+O_2->2H_2O$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

55.

What type of reaction is the following:
$BaCl_2+2KI\ ->\ 2KCl\ +\ BaI_2$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

56.

What type of reaction is the following:
$C_{11}H_{24}+17O_2->\ 11CO_2\ +\ 12H_2O$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

57.

What type of reaction is the following:
$2KI\ ->\ 2K\ +\ I_2$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

58.

What type of reaction is the following:
$2NaHCO_3->\ Na_2CO_3+CO_2+H_2O$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

59.

What type of reaction is the following:
$Zn\ +\ 2HCl\ ->\ ZnCl_2+H_2$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

60.

What type of reaction is the following:
$3CuS\ +2Al\ ->\ Al_2S_3+3Cu$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

61.

What type of reaction is the following:
$2C_4H_{10}\ +13O_2\ ->\ 8CO_2+10H_2O$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

62.

What type of reaction is the following:
$Na_2S\ +2HCl\ ->\ H_2S+2NaCl$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

63.

What type of reaction is the following:
$Ag_3N\ +\ 3HBr->3AgBr+H_3N$

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

64.

What subatomic particles would you find in the nucleus of an atom?

a)

Protons only

b)

Protons and Neutrons

c)

Neutrons and Electrons

d)

Protons and Electrons

65.

What is the number of protons that the element in this image contain?

a)

14

b)

7

c)

15

d)

18

66.

If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?

a)

12 neutrons

b)

12 electrons

c)

12 protons

d)

24 protons and neutrons

67.

An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.

a)

20

b)

10

c)

5

d)

25

68.

Which letter represents a proton?

a)

A

b)

B

c)

C

d)

D

69.

Which subatomic particle has a positive (+) charge?

a)

Neutron

b)

Proton

c)

Electron

70.

Which subatomic particle has a negative (-) charge?

a)

Proton

b)

Electron

c)

Neutron

71.

This particle determines what element you have - the elements identity.

a)

electron

b)

proton

c)

neutron

d)

valence shell

72.

The vertical (up and down) columns in the Periodic Table are called

a)

groups

b)

towers

c)

periods

d)

atomic numbers

73.

The Modern Periodic Table of Elements is arranged by

a)

atomic mass

b)

atomic number

c)

valence electrons

d)

number of isotopes

74.

Which group of the periodic table is composed of inert (not reactive) gases?

a)

alkali metals

b)

alkaline earth metals

c)

halogens

d)

noble gases

75.

The atoms along the staircase are called

a)

metals

b)

nonmetals

c)

metalloids

d)

noble gases

76.

Which is a halogen?

a)

Helium

b)

Chlorine

c)

Oxygen

d)

Neptune

77.

Which is an alkali metal?

a)

Magnesium

b)

Iron

c)

Sodium

d)

Europium

78.

Elements in a ..................have similar chemical properties.

a)

period

b)

group

c)

row

79.

As you move down a group, atomic radius increases because -

a)

you add more and more neutrons

b)

you add more and more protons

c)

you add more and more shells (energy levels)

d)

you add more atomic mass

80.

Elements in the same column of the periodic table always have the same # of _______ as one another.

a)

Protons

b)

Neutrons

c)

Electrons

d)

Valence Electrons

81.

a)

2

b)

3

c)

5

82.

How many valence electrons are in an atom of K?

a)

3

b)

8

c)

4

d)

1

83.

How many valence electrons are in an atom of Ar?

a)

2

b)

8

c)

4

d)

1

84.

Which element could be lustrous and brittle?

a)

A

b)

B

c)

G

d)

L

85.

Which element has 3 valence electrons?

a)

A

b)

B

c)

E

d)

C

86.

Which elements have the same number of valence electrons?

a)

A & C

b)

E & C

c)

F & A

d)

F & B

87.

Which element belongs to the group that is made up of only gases?

a)

D

b)

L

c)

E

d)

A

88.

Is this a metal, nonmetal or metalloid?

a)

Metal

b)

Nonmetal

c)

Metalloid

89.

To which group does this atom belong?

a)

1

b)

3

c)

13

d)

11

90.

How many energy levels does an atom of Chlorine have?

a)

2

b)

3

c)

4

d)

7

91.

What is the group number of this atom?

a)

2

b)

7

c)

14

d)

15

92.

What are valence electrons?

a)

Any of an atom's electrons

b)

Electrons located on the first energy level

c)

Electrons not attached to any atom

d)

electrons located on the outer energy level

93.

Which color on the image of the periodic table corresponds with the metalloids.

a)

bright yellow

b)

gold

c)

teal

d)

light blue

94.

Which elements are to the LEFT of the zigzag?

a)

metals

b)

nonmetals

c)

metalloids

95.

Which elements are colored red?

a)

nonmetals

b)

metals

c)

metalloids

96.

Which is an electron?

a)

A

b)

B

c)

C

97.

On the periodic table, Groups (also known as Families) are

a)

Horizontal rows

b)

Vertical columns

98.

On the periodic table, Periods are

a)

Horizontal rows

b)

Vertical columns

99.

The ability to burn

a)

physical property

b)

chemical property

100.

Solubility

a)

physical property

b)

chemical property

Chemical Bonds, Equations, & Reactions

Total questions: 100

Worksheet time: 1hrs 21mins

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