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Unit 6 Covalent Compounds Review

Total questions: 25

Worksheet time: 22mins

Name
Class
Date
1.
What is the name of N2O3
a)
Nitrogen trioxide
b)
Dinitrogen oxide
c)
Dinitrogen trioxide
d)
Nitrogen oxide
2.
What is the chemical formula for Tetrasulfur pentoxide?
a)
SO
b)
S4O
c)
S4O5
d)
S5O4
3.
What is the chemical formula for Nitrogen triiodide?
a)
NI
b)
N3I
c)
NI3
d)
None of these
4.
What is the name of CO
a)
Carbon oxide
b)
Carbon dioxide
c)
Carbon monoxide
d)
Carbon II oxide
5.
According to the octet rule, all atoms want to have ___ electrons in their outer shell
a)
1
b)
2
c)
6
d)
8
6.
All atoms obey the octet rule except...
a)
H
b)
P
c)
F
d)
Ne
7.
How many valence electrons does N have?
a)
1
b)
3
c)
5
d)
8
8.
How many electrons are shared in a double bond?
a)
1
b)
2
c)
4
d)
6
9.
What is the VSEPR shape of H2S?
a)
linear
b)
trigonal planar
c)
bent
d)
tetrahedral
10.

Which of the following is a covalent bond?

a)

MgS

b)

NaCl

c)

CH4

d)

LiBr

11.

What characteristic differentiates covalent bonding from ionic bonding?

a)

Electrons are transferred from one atom to another to form a bond

b)

Electrons are shared in pairs from one atom to another to form a bond

12.

How would you name the following compound?

SF6

a)

Sulfur Florine

b)

Sulfur fluoride

c)

Monosulfur hexafluoride

d)

Sulfur hexafluoride

13.

Covalent compounds do not conduct electricity because they:

a)

break up into ions

b)

do not break up into ions

c)

do not dissolve in water

d)

have high melting points

14.
Which is true about covalent bonds?
a)
they are between 2 nonmetals
b)
they are between 2 metals
c)
they are between 1 metal and 1 nonmetal
15.
Which element is most likely to form a covalent bond?
a)
Nitrogen
b)
Lithium
c)
Sodium
d)
Potassium
16.

Which of the following is NOT formed by a covalent bond?

a)

K2S

b)

H2O

c)

I2

d)

CO2

17.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Tetrahedral
d)
Linear
18.
Choose the correct shape for this molecule:
a)
Trigonal planar
b)
Trigonal pyramidal
c)
Bent
d)
Tetrahedral
19.

Which of the following shapes has unshared pairs of electrons (also called lone pairs) on the central atom?

a)

Linear

b)

Bent

c)

Trigonal Planar

d)

Tetrahedral

20.
What is the name of pairs of electrons that do not participate in bonding? 
a)
outer pair
b)
unvalenced pair
c)
lone pair
d)
inner pair
21.
What is the empirical formula of the following molecular formula:  C3H6
a)
C3H6
b)
CH2
c)
C2H4
d)
CH3
22.

Which is a possible molecular formula for a compound with an empirical formula of CH2O?

a)

C2H6O

b)

C11H22O11

c)

CHO2

d)

C2H3O2

23.
A formula with the lowest whole # ratio of elements in a compound is called
a)
Molecular Formula
b)
Chemical Formula
c)
Empirical Formula 
d)
Distance Formula
24.
Which of the following is NOT needed to calculate percent composition?
a)
Mass of specific element
b)
Molar Mass
c)
Avogadro's Number
d)
Division
25.
What is the percent composition of S in the formula (NH4)2S ?
a)
12.05%
b)
19.30%
c)
47.11%
d)
56.18%

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