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Unit 7 Review - College Prep
Unit 7 Review - College Prep
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Questions
21
Answers
1
How many valence electrons does Cl
2
have?
7
3
18
14
2
Assume this molecule has polar bonds. Will the molecule be polar or nonpolar overall?
polar
nonpolar
3
How many valence electrons does NO
2
have?
11
3
12
17
4
Do the bonds cancel each other out in this molecule?
Yes
No
5
Which of these compounds has the highest melting point?
CO2
NF3
CH4
NH3
6
Which molecules will have dipole-dipole interactions?
nonpolar molecules
polar molecules
ionic molecules
7
How many lone pairs are on the central atom?
10
2
5
1
8
Which of these compounds will form hydrogen bonds between their molecules?
NF3
CO2
NH3
CH4
9
How many Cl atoms are in NaClO
3
?
4
2
1
3
10
What is the molecular geometry of this molecule?
trigonal planar
bent
trigonal pyramidal
tetrahedral
11
Classify the P-Cl bond as ionic, polar covalent, or nonpolar covalent
ionic
nonpolar covalent
polar covalent
12
Which of these is FALSE about ionic compounds?
high melting and boiling points
do not conduct electricity when dissolved in water
most are solids at room temperature
form crystal lattice structures
13
How many single bonds does this molecule have?
6
2
7
4
14
What is the total number of valence electrons for this molecule?
3
6
8
2
15
What is the molecular geometry of this molecule?
tetrahedral
trigonal planar
trigonal pyramidal
bent
16
Do the bonds cancel each other out for this molecule?
no
yes
17
What could be done to fix this Lewis structure?
Create a triple bond between the C and the O
Add lone pairs to the H atoms
Add a lone pair to the C atom
Create a double bond between the C and the O
18
Assume this molecule has polar bonds. Will the molecule be polar or nonpolar overall?
polar
nonpolar
19
What is wrong with this Lewis structure?
One of the atoms needs an octet
There are not enough valence electrons shown
There are too many valence electrons shown
Nothing is wrong - this is the correct Lewis structure
20
Classify the C-S bond as ionic, polar covalent, or nonpolar covalent
ionic
polar covalent
nonpolar covalent
21
Intermolecular forces are
within a single molecule
between two molecules
