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Covalent Bonding Mostly

Total questions: 90

Worksheet time: 1hrs 7mins

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.

What name is given to the shape shown in the picture?

a)

bent

b)

trigonal planar

c)

triangular

d)

trigonal pyramidal

41.

This molecule has 3 bonds and 1 lone pair around the central atom. What shape is it?

a)

bent

b)

trigonal pyramidal

c)

tetrahedral

d)

linear

42.

Which is the 3D picture of this molecule?

a)
b)
c)
d)
43.

This molecule has 2 bonds and 2 lone pairs around the central atom. What shape is it?

a)

bent

b)

trigonal pyramidal

c)

tetrahedral

d)

linear

44.

What shape is a carbon dioxide molecule?

a)

bent

b)

trigonal pyramidal

c)

tetrahedral

d)

linear

45.

Which of the following shows a tetrahedral shape?

a)
b)
c)
d)
46.

Which is the 3D picture of this molecule?

a)
b)
c)
d)
47.

This molecule has 4 bonds and 0 lone pairs around the central atom. What shape is it?

a)

bent

b)

trigonal pyramidal

c)

tetrahedral

d)

linear

48.

Which is the 3D picture of this molecule?

a)
b)
c)
d)
49.
Which has the greater EN: 
N or C?
a)
C
b)
N
50.
Which has the greater EN: 
H or F?
a)
H
b)
F
51.
Which has the greater EN: 
Cl or Al?
a)
Cl
b)
Al
52.
Elements closer to the noble gases have stronger attraction for electrons.
a)
True
b)
False
53.
Which of the following is the least electronegative element?
a)
oxygen
b)
potassium
c)
fluorine
d)
nitrogen
54.

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

a)

Evenly

b)

Unevenly

c)

Electrons are not shared

d)

None of the Above

55.

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

a)

Evenly

b)

Unevenly

c)

Electrons are not shared

d)

None of the Above

56.

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

a)

Nonpolar covalent

b)

Polar covalent

c)

Ionic

57.

What type of bond is depicted in the image?

a)

Nonpolar Covalent

b)

Polar Covalent

c)

Ionic

58.

In Nitrogen trifluoride, which atom will the electrons spend more time with

a)

N

b)

F

59.

Electronegativity is...

a)

A measure of the amoungt an atom ATTRACTS electrons

b)

A measure of the amount an atom REPELS electrons

c)

the energy required to remove an electron from an atom

d)

is a fear of all things run by electricity

60.

What is the electronegativity difference for the bond in HBr?

a)

0.8

b)

2.2

c)

3.0

d)

5.2

61.

If a bond has an electronegativity difference of 1.0 it is usually called

a)

Nonpolar covalent

b)

Polar covalent

c)

Ionic

62.

What is the electronegativity difference of the S-O bonds in 

SO2SO_2  ?

a)

0.5

b)

0.8

c)

2.5

d)

3.4

63.

NH3NH_3   is a covalent compound. Which atom, N or H, will electrons spend MORE time with?

a)

N

b)

H

c)

Neither

64.

What is the electronegativity difference of the bond in Chlorine gas(Cl2) molecules?

a)

0

b)

1

c)

2

d)

3.2

65.

A polar covalent bond should have an electronegativity difference ranges from _____?

a)

0-0.4

b)

0.5 to 1,7

c)

1.7 to 3.3

66.

Which bond type does Nitrogen make with Iodine?

a)

Nonpolar covalent

b)

Polar covalent

c)

Ionic

67.

In a nonpolar covalent bond, the electrons gather around...

a)

The atom with the Greatest Electronegativity

b)

The atom with the Lowest Electronegativity

c)

Each atom Equally

d)

None of the Above

68.

The polarity of a bond is determined by...

a)

The sum of the electronegativities of the two atoms

b)

The difference in the electronegativities of the two atoms

c)

The charges of the atoms

d)

None of the Above

69.

'Partial'/not fully charged atoms are present in which type of bond?

a)

Ionic

b)

Nonpolar Covalent

c)

Polar Covalent

d)

Both Polar Covalent and Ionic

70.

In a polar covalent bond, which atom will have a partial positive charge?

a)

The atom with the greater electronegativity

b)

The atom that attracts more electrons

c)

The atom with the lower electronegativity

71.

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

a)

nonpolar; unequally

b)

polar; equally

c)

nonpolar; equally

d)

polar; unequally

72.
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

73.

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

a)

1

b)

2

c)

3

d)

4

74.

What shape is a HBr molecule?

a)

bent

b)

trigonal pyramidal

c)

tetrahedral

d)

linear

75.

Which of the following shows a trigonal pyramid shape?

a)
b)
c)
d)
76.

Which of the following shows a linear shape?

a)
b)
c)
d)
77.

Which could be carbon dioxide?

a)
b)
c)
d)
78.

If a bond has an electronegativity difference of 0.4 it is usually called

a)

Nonpolar covalent

b)

Polar covalent

c)

Ionic

79.

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

a)

Nonpolar covalent

b)

Polar covalent

c)

Ionic

80.

If a bond has an electronegativity difference of 0.7 it is usually called

a)

Nonpolar covalent

b)

Polar covalent

c)

Ionic

81.

How many covalent bonds does oxygen usually make?

a)

1

b)

2

c)

3

d)

4

82.

How many covalent bonds does Phosphorous usually make?

a)

1

b)

2

c)

3

d)

4

83.

How many covalent bonds does Chlorine usually make?

a)

1

b)

2

c)

3

d)

4

84.

How many covalent bonds does Hydrogen usually make?

a)

1

b)

2

c)

3

d)

4

85.

How many diatomic elements are there?

a)

3

b)

5

c)

6

d)

7

e)

8

86.

Which of the following is a diatomic element?

a)

Carbon

b)

Iodine

c)

Neon

d)

Magneium

87.

Which of the following is not a diatomic element?

a)

Fluorine

b)

Hydrogen

c)

Sulfur

d)

Bromine

e)

Nitrogen

88.

What did the covalent bond yell to the ionic bond? "Hey, didn't your dad ever teach you to

a)

steal

b)

share

c)

fight

d)

knit

89.

Which of the following is most true

a)

There are in reality 2-4 specific bond types that explain all bonding

b)

Bond types actually exist as part of a spectrum though humans categorize them for study

c)

There are two distinct types of bonding (ionic and covalent) that do not overlap

d)

Reality tends to fall into discrete categories of things and humans falsely put things into spectrums

90.

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

a)

1

b)

2

c)

3

d)

4

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