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Chemical Bonding Review

Total questions: 103

Worksheet time: 52mins

Name
Class
Date
1.
Which of the following has a full valence shell?
a)
Oxygen
b)
Neon
c)
Barium
d)
Carbon
2.
Elements on the LEFT side of the periodic table will most likely form:
a)
Positive ions
b)
Negative ions
c)
Neutral Ions
d)
None of these
3.
An ionic bond forms when atoms ___________ electrons.
a)
gain
b)
share
c)
increase
d)
transfer
4.
Which type of bond has an equal sharing of electrons?
a)
Polar Covalent 
b)
Non Polar Covalent
c)
Ionic
d)
Metallic
5.
Which type of bond has a transfer of an electron from on atom to another?
a)
Polar Covalent 
b)
Non Polar Covalent
c)
Ionic
d)
Metallic
6.
All chemical bonds involve two atoms sharing electrons.
a)
True
b)
False
7.
Chemical bonds form when atoms
a)
combined nuclei
b)
give up neutrons
c)
gain protons
d)
share or transfer electrons
8.
Bonds that form between two metals are called ______________ bonds.
a)
ionic 
b)
covalent
c)
metallic
d)
pervasive
9.
If an atom loses two electrons what charge will it have?
a)
+ 2
b)
 - 2
c)
+1
d)
-1
10.
If an atom gains one electron what charge will it have?
a)
-2
b)
-1
c)
+1
11.
What is the number of valence electrons for Oxygen?
a)
8
b)
6
c)
2
d)
1
12.
How many valence electrons in this structure?
a)
6
b)
5
c)
4
d)
7
13.
The chemical bond formed when two atoms share electrons  is called a(an) IONIC bond. 
a)
True
b)
False
14.
How are covalent bonds explained?
a)
When one atom takes the other atom's electron
b)
When the atom shares an electron with an another atom
c)
When the two nucleus merge
d)
When the neutrons leave the nucleus
15.

Typically, atoms are more stable when they are

a)

bonded together

b)

apart from each other

16.

Why do atoms bond?

a)

They typically don't bond

b)

To add or take away energy levels

c)

To have a full valance shell.

d)

To have a full inner shell

17.

What happens when magnesium loses 2 electrons?

a)

It stabilizes to a net charge of 0

b)

It turns into an atom

c)

It becomes negatively charged

d)

It becomes positively charged

18.

Predict the bond between Mg and Cl

a)

covalent

b)

ionic

c)

metallic

d)

none of the above

19.

Which is the correct Lewis Structure for oxygen?

a)
b)
c)
d)
20.
Predict the bond that will form between Be and F.
a)
Ionic
b)
Covalent
21.
Predict the bond that will form between Se and Cl
a)
Ionic
b)
Covalent
22.
How many electrons does Si contain? (click to see image)
a)
14
b)
28
c)
2
d)
4
23.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
24.
The number of _____ is most important in determining how an atoms will bond. 
a)
Neutrons
b)
Protons
c)
Valence Electrons
d)
Electron sin the innermost shell
25.

Is H2O2 an element or a compound?

a)

element

b)

compound

26.

An atom that gains or loses an electron becomes

a)

an isotope

b)

a new element

c)

an ion

d)

a molecule

27.

Valence electrons are

a)

neutral (no charge)

b)

found in the outer most energy level of the atom

c)

equal to the number of protons

28.

Which type of bonds create compounds?

a)

covalent bonds

b)

ionic bonds

c)

metallic bonds

d)

all type of bonds

29.

Which type of bond occurs between non metals?

a)

covalent bonds

b)

ionic bonds

c)

metallic bonds

d)

all types of bonds

30.

How many different elements are in the C6H12O6

a)

3

b)

6

c)

12

d)

24

31.

How many total atoms are in C6H1206

a)

3

b)

6

c)

12

d)

24

32.

Is this equation balanced? C3H8 + 5O2 = 4H2O + 3CO2

a)

yes

b)

no

33.

How many oxygen atoms on each side of C3H8 + 5O2 = 4H2O + 3CO2

a)

2

b)

3

c)

5

d)

10

34.

In order for a chemical reaction to occur,

a)

there must be an explosion or fire

b)

bubbling or gas must be produced

c)

a new substance must be formed

d)

the substance must turn color

35.

After a chemical reaction occurs, atoms are not created nor destroyed,

a)

just rearranged into a new substance

b)

just changed into different elements

c)

just turned into unstable elements

36.

Most elements bond to create compounds because

a)

their outer electron level is full

b)

they are unstable

c)

they are positively charged

37.

1. Are the atoms more stable when they are bonded together or when they are apart?

a)

Bonded Together

b)

Apart

38.

10. What charges attract?

a)

Opposite

b)

Same

39.

11. What charges repel?

a)

Same

b)

Opposite

40.

16. What is the number of valence electrons for Calcium (Group 2)?

a)

1

b)

2

c)

3

d)

4

41.

17. What is the number of valence electrons for Carbon (Group 14)?

a)

1

b)

2

c)

3

d)

4

42.

18. What is the number of valence electrons for Neon and the other Noble Gases?

a)

5

b)

6

c)

7

d)

8

43.

20. If I was trying to determine if two atoms will bond, what would be helpful to know:

a)

Valence electrons, found by group number

b)

Whether the elements are metals or nonmetals

c)

The electronegativity of the atoms

d)

All of the above, all of which can be found on the Periodic Table

44.
Why do bonds form?
a)
To fill the valence shell of electrons for the elements involved
b)
to release energy stored in the bonds
c)
because whenever you mix two chemicals, there will be a reaction
d)
because of attraction
45.

A compound is made of two nonmetals. It is

a)

ionic

b)

metallic

c)

covalent

46.

A chemical bond between oppositely charged ions.

a)

Covalent bonds

b)

Ionic Bonds

c)

Ion

d)

Compound

47.

The small numbers in a chemical formula:

(the BLUE numbers)

a)

Subscripts

b)

Coefficients

c)

Numbers

d)

Molecules

48.

The big/regular sized numbers in a chemical formula:

(the RED numbers)

a)

Subscripts

b)

Coefficients

c)

Numbers

d)

Molecules

49.

How many Hydrogen are in H2O?

a)

1

b)

2

c)

3

d)

Not enough information.

50.

How many Chlorine in 5NaCl?

a)

1

b)

5

c)

3

d)

Not enough information.

51.

How many Oxygen in 3CO2?

a)

3

b)

2

c)

6

d)

Not enough information.

52.

Is this equation balanced?

a)

Yes, everything appears the same amount on each side.

b)

No, there are too many oxygen on the left side.

53.

Is this equation balanced?

a)

Yes, everything appears the same amount on each side.

b)

No, there are too many hydrogen on the left side.

c)

No, there are too many oxygen on the left side.

54.

Is this equation balanced?

a)

Yes, everything appears the same amount on each side.

b)

No, there are too many hydrogen on the left side.

c)

No, there are too many oxygen on the left side.

55.

Is this equation balanced?

a)

Yes, everything appears the same amount on each side.

b)

No, there are too many copper on the left side.

c)

No, there are too many oxygen on the left side.

56.

Is this equation balanced?

a)

Yes, everything appears the same amount on each side.

b)

No, there are too many hydrogen on the left side.

c)

No, there are too many oxygen on the left side.

57.
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
58.
Is this balanced?...
Al + O2 --> 2Al2O3
a)
Yes!
b)
NO!
59.
Balance this equation...
HgO --> 2Hg + O2
a)
It is balanced 
b)
2HgO --> Hg + O2
c)
2HgO --> 2Hg + O2
60.
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
61.

How many valence electrons does magnesium have?

a)

6

b)

12

c)

2

d)

10

62.

How many valence electrons does elements in group 16 have?

a)

16

b)

1

c)

6

d)

0

63.

How many protons, neutrons, and electrons does a neutral Selenium (Se) have?

a)

34, 45, 34

b)

34, 34, 45

c)

45, 45, 45

d)

45, 34, 34

64.

What does the symbol inside the circle mean?

a)

"yields, or produces"

b)

"dissolved in water"

c)

"forms a precipitate"

d)

"released as a gas"

65.
In this image, the information in red is called the_______.
a)
Products
b)
Reactants
c)
Chemical Subscript
d)
Ingredients
66.
In this image, the information to the right of the arrow (in black) is called the_______.
a)
Product
b)
Reactant
c)
Chemical Subscript
d)
Final chemical
67.
How many ELEMENTS are in the compound H2O
a)
1
b)
2
c)
3
d)
4
68.
How many ELEMENTS are in the compound O2
a)
1
b)
2
c)
3
d)
4
69.
How many ATOMS of Carbon are in 3C2H4O
a)
2
b)
3
c)
4
d)
6
70.
How many ATOMS of Oxygen are in 3Fe2O3
a)
2
b)
3
c)
6
d)
9
71.
How many TOTAL atoms are in 2H2SO4
a)
2
b)
4
c)
7
d)
14
72.
How many TOTAL atoms are in 2CaO2
a)
2
b)
3
c)
5
d)
6
73.
Is the following equation balanced or unbalanced ? 
Al + O2 --> Al2O3
a)
Balanced
b)
Unbalanced
74.
Is the following equation balanced or unbalanced ? 
N2 +3 H2 --> 2NH3
a)
Balanced
b)
Unbalanced
75.

Identify the reactants in the following equation.

3HFe2O →H+2FEH+O

a)

H+2FEH+O

b)

3HFe2O

76.

Identify the products in the following equation.

3HFe2O →H+2FEH+O

a)

H+2FEH+O

b)

3HFe2O

77.

How many Carbon atoms on the Reactant side of the equation?

5C4O8→10C+2C5O20

a)

4

b)

5

c)

10

d)

20

78.
What is the total number of atoms present in 5Na3PO4
a)
5
b)
40
c)
55
d)
8
79.

Which of the following models best demonstrates a balanced chemical equation?

a)

F

b)

G

c)

H

d)

J

80.

What does the number 4 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

81.

A student mixes 125 grams of sugar, 250 grams of water and 5 grams of flavoring. The solution weighs...

a)

250 grams

b)

380 grams

c)

375 grams

d)

400 grams

82.
Which of these is not a chemical reaction?
a)
Burning of wood
b)
Milk going bad
c)
Mixing vinegar and baking soda
d)
Melting of ice
83.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
84.
What will weigh more when a chemical change is complete?  The reactants before the chemical reaction, or the product after the reaction is complete?
a)
They both will weigh the same
b)
The product always weighs more than the reactant
c)
The reactant will weigh more than the product
d)
They both will loose mass after the reaction
85.
Jamie weighs a glass of water and observes its weight to be 12 ounces. Jamie then adds 6 ice cubes to the glass of water. Each ice cube weighs one ounce. After all of the ice cubes have melted, what will be theapproximate weight of the glass of water?
a)
6 
b)
12 
c)
18 ounces
86.

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

a)

reactants

b)

products

c)

subscripts

d)

coefficients

87.

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.

88.

________ are the starting substances in a chemical equation.

a)

Reactants

b)

Producer

c)

Reaction

d)

Products

89.

The law of conservation of mass states that ________

a)

the total mass of reactants is more than the total mass of products

b)

the mass of a chemical reaction is not constant

c)

the mass of a chemical reaction remains constant

d)

the total mass of reactants is less than the total mass of products

90.
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
91.
If a reaction starts with a total 75g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 75g of products
c)
a total of 180 g of products
d)
None of the above
92.
Bob puts 200 grams of ice into a pitcher with 900 grams of water. He gets distracted and comes back later to find that the ice has melted in the water. How many grams of water does Bob now have in the pitcher?
a)
200 g
b)
700 g
c)
1,100 g
93.
The number in front of a compound or element is a 
a)
Subscript
b)
Coefficient
c)
Superscript
d)
Charge
94.
The number to the lower side of an element is a 
a)
Subscript
b)
Superscript
c)
Coefficient
d)
Charge
95.

Which of the following are Subscripts in this Chemical Formula: 3Fe2O4

a)

3,4

b)

3,2

c)

2,4

d)

6

96.
The coefficient in  3H2O is
a)
6
b)
2
c)
3
d)
5
97.

The Coefficient (3) in the Chemical Formula, 3H2O, tells you how many _____________ there are.

a)

Atoms of Hydrogen

b)

Atoms of Oxygen

c)

Atoms of Water

d)

Molecules of Water

98.

The Subscript (2) in the Chemical Formula, 3H2O, tells you how many _____________ there are.

a)

Atoms of Hydrogen

b)

Atoms of Oxygen

c)

Atoms of Water

d)

Molecules of Water

99.

How many oxygen atoms are in this chemical formula?

a)

6 oxygen atoms

b)

2 oxygen atoms

c)

3 oxygen atoms

d)

4 oxygen atoms

100.
When CaCO3 is heated, it forms CaO and CO2. Which of these statements best describes the mass of the products if 100 g of CaCO3 is heated?
a)
The difference in the products’ masses is equal to the mass of the CaCO3
b)
The sum of the products’ masses is less than the mass of the CaCO3
c)
The mass of each product is equal to the mass of the CaCO3
d)
The sum of the products’ masses equals the mass of the CaCO3
101.
24 g of magnesium reacts with 38 g of fluorine to produce _____ g magnesium fluoride
a)
62 
b)
38
c)
24
d)
14
102.

32 g of Oxygen completely reacts with 8 g of Hydrogen to produce _____ g Water

a)

8

b)

12

c)

24

d)

40

103.

Solve for the unknown mass: 6.1 g + ? g = 9.1 g

a)

15.2

b)

3 g

c)

15.2 g

d)

3

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