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Covalent Bonding Test

Total questions: 80

Worksheet time: 6hrs 18mins

Name
Class
Date
1.

What two types of atoms usually make a covalent bond?

a)
2 Nonmetals
b)
1 Nonmetal and 1 Metal
c)
2 Metals
d)
2 Noble Gases
2.
What can be generalized about covalent bonds?
a)
Electrons will be exchanged.
b)
Electrons will be transferred.
c)
Electrons will be given and taken.
d)
Electrons will be shared.
3.

Carbon is in Group 4/4A, so how many bonds must it form to become more stable?

a)

1

b)

3

c)

4

d)

5

4.

When two nonmetals do not share electrons evenly, the resulting covalent bond will be

a)

nonpolar

b)

polar

c)

ionic

d)

metallic

5.
What is the number of valence electrons for Oxygen?
a)
8
b)
6
c)
2
d)
1
6.
How many valence electrons does nitrogen have?
a)
3
b)
2
c)
5
d)
1
7.

Which of the following is the best representation of a molecule of fluorine (F2)?

a)

A

b)

B

c)

C

d)

D

8.
What is a diatomic element?
a)

a type of metal that exists in pairs

b)

an element made up of two different atoms bonded together

c)

an element whose atoms exist in pairs always

d)

an element whose atoms exist in pairs when the element is found by itself

9.

What type of bond is usually formed between a metal and a nonmetal?

a)

Covalent bond

b)

Ionic bond

c)

Hydrogen bond

d)

Metallic bond

10.
The number of bonds an element will form in a covalent compound will be equal to
a)
the number of valence electrons
b)

eight always

c)

the number of electrons needed to reach a noble gas-like configuration

d)

the number of bonds that is needed to form an octet always

11.

Which formula is for phosphorus trichloride?

a)

KCl3

b)

PCl3

c)

K3Cl

d)

P3Cl

12.

Silicon dioxide is the compound in sand. What is its formula?

a)

SO2

b)

NaO2

c)

SiO2

d)

SiO

13.
The chemical formula of sulfur hexabromide is
a)
SBr₆
b)
S₆Br
c)
S(VI)Br
d)
S6Br
14.

What is the formula for diphosphorus pentoxide?

a)

P2O5

b)

PO5

c)

P5O2

d)

P2O6

15.
What is the correct name for NO?
a)
Mononitrogen Monoxide
b)
Nitrogen Monoxide
c)
Mononitrogen Dioxide
d)
Nitrogen Oxide
16.
Which of the following is NOT an ionic compound:
a)
CaO
b)

NaF

c)
BaCl2
d)
Br2
17.

What is the reason why Noble gases are so stable?

a)

They have an even number of electrons

b)

They have no electrons

c)

They have the lowest energy electron configurations

d)

They bond with other atoms

18.

How many electrons can be held in the first shell?

a)

1

b)

2

c)

4

d)

8

19.

Which of these is not a covalent molecule?

a)

MgO

b)

CO2

c)

HCl

d)

CH4

20.

Chlorine has 7 electrons in it's outer shell. How many covalent bonds does it need to obtain an octet like Argon?

a)

1

b)

2

c)

3

d)

4

21.

Carbon has 4 electrons in it's outer shell. How many covalent bonds does it need to to obtain an octet like Neon?

a)

1

b)

2

c)

3

d)

4

22.

Why do atoms have an overall neutral charge?

a)

So that they can't react

b)

Because they have neutrons in their nucleus

c)

Because they have electrons arranged in shells

d)

Because they have the same number of protons and neutrons

23.

How many ATOMS are in one molecule of CH4?

a)

2

b)

4

c)

5

d)

3

24.

How can you fix this electron dot diagram?

a)

Erase the two extra electrons on Carbon

b)

Two more covalent bonds should be made to the oxygen on the left

c)

Share another pair of electrons between each oxygen and the central carbon

d)

1 more electrons should be added to each oxygen atom

25.

Why is this diagram of bonding in carbon dioxide (CO2) incorrect?

a)

There should be 2 carbon atoms and one oxygen

b)

2 more electrons should be added to the carbon atom

c)

None of the atoms have a stable octet

d)

2 more electrons should be added to the oxygen atoms

26.

What is the correct formula for this molecule?

a)

CH

b)

C1H4

c)

CH4

d)

C4H

27.
What would you name this molecule?
a)

Monoxygen dihydride

b)

Hydrogen oxide

c)

Hoh

d)

Dihydrogen monoxide

28.
In a covalent bond, one or more electrons are? 
a)
shared 
b)
lost 
c)
gained 
d)
transferred 
29.

What is a negatively charged atom called?

a)

Anion

b)

Cation

c)

Ion

30.

Which part of the atom is responsible for chemical bonding?

a)

Core Electrons

b)

Valence Electrons

c)

Protons

d)

Neutrons

31.

What is the name of K2O?

a)

Dipotassium monoxide

b)

Dipotassium oxygen

c)

Potassium oxide

d)

Potassium oxygen

32.

A group of covalently bonded atoms is called a _________________

a)

crystal

b)

molecule

c)

salt

d)

pod

33.
What elements generally make a covalent bond?
a)
metal and nonmetal
b)
2 or more nonmetals
c)
metal
d)
none of the above
34.

Looking at your Periodic Table, what kind of bond would NaF create?

a)

Covalent

b)

Molecular

c)

Ionic

d)

Metallic

35.
What is the chemical formula for Tetrasulfur pentoxide?
a)
SO
b)
S4O
c)
S4O5
d)
S5O4
36.

The only time a prefix is not used in a covalent bond is when:

a)

the first element in one

b)

the second element is one

c)

anytime there are more than 11

d)

you never use prefixes in covalent bonds

37.

Triple bonds are formed when atoms share _____ pairs of valence electrons.

a)

two

b)

four

c)

three

d)

six

38.

What holds the atoms together in a covalent bond?

a)

Spit

b)

Attractions between the opposite charges

c)

The shared electrons fly around both nuclei

d)

nothing

39.
What is the correct formula for this molecule?
a)
NH
b)
N3H
c)
NH3
d)
NH4
40.
Elements closer to the noble gases have stronger attraction for electrons.
a)
True
b)
False
41.

The electrons in a POLAR covalent bond are shared...

a)

Evenly

b)

Unevenly

c)

Electrons are not shared

d)

None of the Above

42.

If a bond has an electronegativity difference of 2.0 it is usually called

a)

Nonpolar covalent

b)

Polar covalent

c)

Ionic

43.

A diatomic molecule like O2 is always _____ because electrons are shared _____

a)

nonpolar; unequally

b)

polar; equally

c)

nonpolar; equally

d)

polar; unequally

44.
Why do elements bond?
a)
To be friends
b)
To create a new element
c)

To become lower in energy and thus more stable

d)

To gain energy and thus become more stable

45.

How many valence electrons do elements in group 1/1A have?

a)

1

b)

2

c)

3

d)

4

46.

Which could be carbon dioxide?

a)
b)
c)
d)
47.

If a bond has an electronegativity difference of 3.0 it is usually called

a)

Nonpolar covalent

b)

Polar covalent

c)

Ionic

48.

How many covalent bonds does oxygen usually make?

a)

1

b)

2

c)

3

d)

4

49.

How many covalent bonds does Phosphorous usually make?

a)

1

b)

2

c)

3

d)

4

50.

How many covalent bonds does Chlorine usually make?

a)

1

b)

2

c)

3

d)

4

51.

How many covalent bonds does Hydrogen usually make?

a)

1

b)

2

c)

3

d)

4

52.

Which of the following is a diatomic element?

a)

Carbon

b)

Iodine

c)

Neon

d)

Magneium

53.

Which of the following is not a diatomic element?

a)

Fluorine

b)

Hydrogen

c)

Sulfur

d)

Bromine

e)

Nitrogen

54.

How many valence electrons do elements in group 3/3A have?

a)

1

b)

2

c)

3

d)

4

55.

Name the following ionic compound: Cs2S

a)

cesium sulfide

b)

cesium sulfate

c)

cesium II sulfate

d)

cesium II sulfide

56.

What is the correct Lewis Dot Structure for ammonia NH3

a)
b)
c)
d)
57.

Which is the correct molecular structure for carbon dioxide?

a)
b)
c)
d)
58.

Is this the correct structure for CH2O?

a)

Yes

b)

No

59.

How many pairs of valence electrons are being shared in a single ammonia molecule?

a)

0 pair - 0 valence electrons

b)

1 pair - 2 valence electrons

c)

2 pair - 4 valence electrons

d)

3 pair - 6 valence electrons

60.

How many pairs of valence electrons are being shared in a single water molecule?

a)

0 pair - 0 valence electrons

b)

1 pair - 2 valence electrons

c)

2 pair - 4 valence electrons

d)

3 pair - 6 valence electrons

61.

How do covalent bonds form?

a)

Donating & receiving valence electrons between atoms

b)

Oppositely charged ions attract each other & form bonds

c)

Scientists are still not sure how they form

d)

Sharing valence electrons between atoms

62.

The formation of a covalent bond relies on the interaction or bonding of...

a)

2 Nonmetals

b)

1 Nonmetal & 1 Metal

c)

2 Metals

d)

2 Noble Gases

63.

This is the displayed formula for what covalent compound?

a)

Water

b)

Hydrogen peroxide

c)

Hydrogen oxide

d)

Ethanol

64.

This is the displayed formula for what covalent molecule?

a)

Water

b)

Chlorine

c)

Chloride

d)

Ethanol

65.

Chlorine is a diatomic element which means in nature, it is found in two's. (Cl2) Chlorine shares one pair of electrons to make sure each atom complete the octet rule. This creates a...

a)

single bond

b)

double bond

c)

triple bond

66.

Oxygen is a diatomic element which means in nature, it is found in two's. (O2) Oxygen shares two pairs of electrons to make sure each atom completes the octet rule. This creates a...

a)

single bond

b)

double bond

c)

triple bond

67.

Nitrogen is a diatomic element which means in nature, it is found in two's. (N2) Nitrogen shares three pairs of electrons to make sure each atom completes the octet rule. This creates a...

a)

single bond

b)

double bond

c)

triple bond

68.

What does this picture illustrate? (Select all that apply)

a)

Sharing valence electrons

b)

Covalent bonding

c)

transferring valence electrons

d)

ionic bonding

e)

two nonmetals

69.

How many covalent bonds are created in a single water molecule?

a)

0

b)

1

c)

2

d)

3

e)

4

70.

How many covalent bonds are created in a single ammonia molecule?

a)

0

b)

1

c)

2

d)

3

e)

4

71.

How many pairs of valence electrons are being shared in a single water molecule?

a)

0 pair - 0 valence electrons

b)

1 pair - 2 valence electrons

c)

2 pair - 4 valence electrons

d)

3 pair - 6 valence electrons

72.

How many pairs of valence electrons are being shared in a single ammonia molecule?

a)

0 pair - 0 valence electrons

b)

1 pair - 2 valence electrons

c)

2 pair - 4 valence electrons

d)

3 pair - 6 valence electrons

73.

What type of elements share electrons and form covalent bonds?

a)

Nonmetals

b)

Metals

c)

Metalloids

d)

A Metal & A Nonmetal

74.

What type of bond will this compound likely form H-Cl?

a)

Ionic compound

b)

Covalent compound

c)

Metallic compound

75.

What type of bond will this ammonia compound likely form (NH3)?

a)

Ionic compound

b)

Covalent compound

c)

Metallic compound

76.

What type of bond will this compound likely form [Na]+ & [Cl]- ?

a)

Ionic compound

b)

Covalent compound

c)

Metallic compound

77.

What type of bond will this ammonium chloride compound likely form?

a)

Ionic compound

b)

Covalent compound

c)

Metallic compound

78.

When assigning the number of individual atoms in a chemical formula it is written as a...

a)

superscript

b)

subscript

c)

coefficient

d)

script

79.

How many total atoms are in the ionic compound Ca(NO3)2 (Calcium nitrate)?

a)

3

b)

5

c)

6

d)

9

e)

10

80.

How many total atoms are in the covalent compound C4H10 (Butane)?

a)

6

b)

8

c)

10

d)

12

e)

14

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