Writing Formulas Of Chemical Compounds
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1Writing Formulas of Chemical
Compounds
Are there any prefixes
in the name of the
compound.
Yes
No
Binary Molecular
Is there a polyatomic ion present?
Compound
(Hint: Look for things that end in
-ite or -ate.)
Yes
No
Polyatomic Ionic
Binary Ionic
1. Use the prefixes to
Compound
Compound
determine how many of each
element are present.
2. Write the formula for the
compound using subscripts to
show the number of each
Write the formula for the
element.
polyatomic ion in parentheses
(make sure to put the charge of
1. Determine the charges of
the ion outside the parentheses).
the ions.
2. Cross the charges
3. Write the formula for the
compound, making sure that
the positive ion is first.
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