Naming Compounds Tutorial And Worksheet With Answers Page 18
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20Example: Write the name for SO
3
1) List the name of the first element in the formula.
sulfur
2) List the second element and add the –ide suffix.
sulfur oxide
3) Use Greek prefixes to indicate the number of each atom in the formula.
____ sulfur _____ oxide
sulfur trioxide
•
Exception: do not use mono- for the first element in the name.
•
NOTE, we did not write monosulfur because of this rule!
•
The o or a at the end of the Greek pre-fix is usually dropped when the element
name begins with a vowel
•
Not applicable in this example
Example: Write the name for CO
1) List the name of the first element in the formula.
carbon
2) List the second element and add the –ide suffix.
carbon oxide
3) Use Greek prefixes to indicate the number of each atom in the formula.
____ carbon _____ oxide
carbon monoxide
•
Exception: do not use mono- for the first element in the name.
•
NOTE, we did not write monocarbon because of this rule!
•
The o or a at the end of the Greek pre-fix is usually dropped when the element
name begins with a vowel
•
NOTE, we did not write monooxygen because of this rule!
Write the names of the following compounds:
See next page for key
a. Br
I
________________________________________
2
4
b. P
F
________________________________________
5
8
c. NO
________________________________________
5
•
Remember: The o or a at the end of the Greek pre-fix is usually dropped
when the element name begins with a vowel
d. NBr
________________________________________
3
e. N
O
________________________________________
2
5
f. BrCl
________________________________________
3
g. H
S
________________________________________
2
h. N
O
________________________________________
2
18
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