Section 9.3
Molecular Structures
Practice Test
1.
When a hydrogen atom is part of a molecular structure, it is always a ________ atom.
a.
terminal
b.
ionic
c.
central
d.
1
–
Hint
2.
In the compound H
2
SO
4
, which element will be the central atom in the molecular structure?
a.
H
b.
S
c.
O
d.
both S and O
Hint
3.
In forming a molecular structure, each atom should have ________ electrons around it unless there is some specific reason why this cannot be achieved.
a.
2
b.
4
c.
6
d.
8
Hint
4.
Which element can share only one pair of electrons?
a.
H
b.
C
c.
N
d.
O
Hint
5.
To determine the number of bonding electron pairs, you must divide the number of electrons available for bonding by _______.
a.
1
b.
2
c.
3
d.
4
Hint
6.
How many lone pairs of electrons are present in a molecule of water?
a.
1
b.
2
c.
3
d.
4
Hint
7.
When two or more Lewis structures can be used to represent a single molecule, these multiple structures are ______________.
a.
resonance structures
b.
isomeric structures
c.
polar structures
d.
liquid structures
Hint
8.
Which of the following atoms will be an exception to the octet rule in a molecule?
a.
O
b.
N
c.
C
d.
B
Hint
