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Covalent Review

Total questions: 25

Worksheet time: 34mins

Name
Class
Date
1.
What is the correct name for C4H6?
a)
Carbon Hexahydride
b)
Pentacarbon Pentahydride
c)
Hexacarbon Tetrahydride
d)
Tetracarbon Hexahydride
2.
What is the correct name for NO?
a)
Mononitrogen Monoxide
b)
Nitrogen Monoxide
c)
Mononitrogen Dioxide
d)
Nitrogen Oxide
3.
What is Sulfur Trichloride?
a)
SCl3
b)
SiCl3
c)
SCl4
d)
Si3Cl
4.
P2O5
a)
Phosphorus Oxide
b)
Pentaphosphorus Dioxide
c)
Diphosphorous pentoxide
d)
Phosphoric Oxygen
5.
PBr5
a)
Phosphorus Bromide
b)
Phosphorus Pentabromide
c)
Pentaphosphorus bromide
d)
Phosphorus Bromine
6.
As4O10
a)
arsenic oxide
b)
quadarsenic decoxide
c)
tetraarsenic decoxide
d)
arsenic decoxide
7.
Disulfur trioxide
a)
S3O2
b)
SO
c)
S2O3
d)
S2O
8.
In Cl2, the 2 is known as
a)
the subscript.
b)
the coefficient.
c)
the molecular mass.
d)
the number of protons.
9.
Bonds between two nonmetal atoms are 
a)
covalent.
b)
ionic.
c)
incomplete.
d)
complete.
10.
N2, Cl2, and O2 are all 
a)
diatomic molecules.
b)
ionic bonds.
c)
of equal mass.
d)
solids.
11.

What is the correct name of this compound?


CBr4

a)

Carbon Bromide

b)

Monocarbon tetrabromide

c)

Carbon tetrabromide

d)

Tetracarbon Bromide

12.
Which of the following is NOT formed by a covalent bond?
a)
K2S
b)
H2O
c)
I2
d)
CO2
13.
The chemical formula of tetraphosphorus heptaoxide is
a)
F₄O₁₀
b)
P₄O7
c)
PO
d)
P₁₀O₄
14.
What is the formula for Hexaboron Monosilicide
a)
B6Si
b)
BSi
c)
BSi6
d)
B6Si6
15.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
16.
Hydrogen needs _____ electrons in its valence shell to be stable.
a)
4
b)
6
c)
8
d)
2
17.
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
a)
A
b)
B
c)
C
d)
D
18.

What is the correct Lewis Dot Structure for ammonia NH3

a)
b)
c)
d)
19.

Which is the correct molecular structure for carbon dioxide?

a)
b)
c)
d)
20.
Which of the following is the correct Lewis structure for water?
a)
A
b)
B
c)
C
21.
Which of the following is the correct Lewis structure for the compound PBr3?
a)
structure A
b)
structure B
c)
structure C
d)
structure D
22.

Why is this Lewis Structure incorrect? Select all that appy.

a)

There should be a single bond between H and C.

b)

There should be a triple bond between C and N.

c)

Carbon has too many bonds around it.

d)

Hydrogen needs more electrons.

23.

Why is this Lewis Structure incorrect? Choose all that apply.

a)

There are too many bonds around Si.

b)

There should only be single bonds in this Lewis Structure.

c)

The Structure is missing a triple bond.

d)

Chlorine only has 6 electrons surrounding it.

24.

What's wrong with this Lewis structure? Pick all that apply.

a)

Carbon has too many electrons.

b)

Chlorine doesn't like to have double bonds.

c)

The chlorine on the right has too many electrons.

d)

The chlorines on the top and left don't have enough electrons.

25.

What's wrong with this Lewis structure? There's only one correct answer here.

a)

The nitrogens don't have enough electrons.

b)

The nitrogens have too many electrons.

c)

The hydrogens don't have enough electrons.

d)

Nothing, it's correct.

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