KEY-FinalExamStudyGuide_Fall2013

Name ___________________________ Date ___________________ Class __________________
CHAPTER 8, Covalent Bonding (continued)
Molecular Formulas (pages 215–216)
7. What is a molecular formula?
A molecular formula shows the types and numbers of atoms present in a molecule
of a compound.
Match each compound with its molecular formula.
_______ b 8. carbon dioxide a. C 2 H 6
_______ a 9. ethane b. CO 2
_______10. c ammonia c. NH 3
11. Is the following sentence true or false? A molecular formula shows the
arrangement of the atoms in a molecule. ______________________
false
In the diagram, match the type of model or formula with its representation.
a. ball-and-stick model d. space-filling molecular model
b. molecular formula e. structural formula
c. perspective drawing
NH 3 (g)
12. _______________ b
N
H
H
H
N
H
H
H
14. _______________ d
H
N
H
H
15. _______________
c
H N H
H
13. _______________ a
16. _______________ e
17. What is the arrangement of atoms within a molecule called?
___________________________
molecular structure
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