Unit 5 Review
Multiple Choice: Circle the correct answer.
1.) In a covalent bond, electrons are _____________________
a.Transferred
b. lost
c. gained
d. shared
2.) Two electrons are shared in a ____________________.
a. single covalent bond b. double covalent bond
c. triple covalent bond
3.) Another name for covalent compounds is
__________________
a. Molecular
b. ionic
c. metallic
d. acidic
Ionic
4. Has a high melting point? ___
5. Balance charges in formula?___
6. Always solid at room temp? ___
7. Names use prefixes?
___
Covalent
___
___
___
___
8. Does not conduct – ever!
9. Conducts in solution?
10. Hard and brittle?
11. Made of ions?
Ionic
Covalent
___
___
___
___
___
___
___
___
12. Has a crystal lattice?
13. Found as molecules?
14. Contains a metal?
15. Contains only nonmetals?
___
___
___
___
___
___
___
___
Complete the table of covalent compounds. Give names or formulas.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
Disulfur trioxide
Carbon monoxide
Tetraphosphorus decaoxide
silicon pentafluoride
phosphourous tetrabromide
S203
CO
P4O10
SiF5
PBr4
ammonia
NH3
Dinitrogen monoxide
N2O
CuCl2
P308
Copper(II) chloride
Triphosphorus octaoxide
Disilicon tetrabromide
Si2Br4
Cesium oxide
Cs2O
Calcium phosphate
Ca3(PO4)2
Draw the Lewis Structures and name the shape of the following molecules
28.
NCl3
29. SF2
30. SO32-
31. SiO2
32.
SO3
or
or
33. which of the following(28-32)
demonstrate(s) resonance?
32 (SO3)
#_______________
34. Define polarity. What are the 2
requirements for a molecule to be
polar?
The unequal sharing of electrons. The bond must be
polar and the molecule. Must be asymmetrical (have
unshared e-).
35. Identify the type of bond (ionic, Polar
covalent, or nonpolar covalent).
Polar covalent
H and O: __________________
ionic
Na and Cl: _________________
Nonpolar covalent
H and C: __________________
36. Go back to the Lewis Structures you completed in #28-32 of the
review. Look at the molecule and the bond type. State whether the
following molecules are polar or nonpolar:
•
•
•
•
•
Molecule 28 is ( polar
Molecule 29 is ( polar
Molecule 30 is ( polar
Molecule 31 is ( polar
Molecule 32 is ( polar
/
/
/
/
/
nonpolar
nonpolar
nonpolar
nonpolar
nonpolar
)
)
)
)
)