Writing Formulas & Names For Polyatomic Compounds Page 3
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4INFORMATION
Naming Polyatomic Compounds
Naming polyatomic compounds is similar to naming binary compounds (except, of course, for the
presence of the polyatomic anion instead of a monatomic anion). Examine the following examples:
1. Magnesium cyanate, Mg(OCN)
5. Aluminum hexafluorosilicate, Al
(SiF
)
2
2
6
3
2. Beryllium chlorate, Be(ClO
)
6. Strontium gallate, Sr
(GaO
)
3
2
3
3
2
3. Ammonium nitrate, NH
NO
7. Sodium hydroxide, NaOH
4
3
4. Ammonium nitride, (NH
)
N
8. Ammonium chloride, NH
Cl
4
3
4
Key Questions
7. In grammatically correct English, write detailed procedures for a) writing polyatomic formulas and
b) naming polyatomic compounds. Assume that the procedures will be used by someone who has no
prior knowledge of this material.
Exercises
8. Write names for the following polyatomic compounds:
a. NaCrO
e. Na
C
H
O
2
2
4
4
6
b. Al
(MoO
)
f. LiMnO
2
4
3
4
c. Sr(HSO
)
g. GaPO
3
2
4
d. K
(P
O
)
h. CaCr
O
4
2
7
2
7
Writing Formulas & Names for Polyatomic Ionic Compounds / 3
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