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Molecular Compound Naming Worksheet

Practice naming molecular compounds using prefixes and suffixes.

Grade 9 Science ChemistryNaming Molecular Compounds
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Includes

Fill in the BlanksMultiple ChoiceShort AnswerMatching

Standards

HS-PS1-1HS-PS1-2

Topics

chemistrymolecular compoundsnomenclaturegrade 9
6 sections · Free to use · Printable
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Molecular Compound Naming Practice

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Read each question carefully and follow the instructions to name molecular compounds or write their chemical formulas.

Complete the following sentences by filling in the correct molecular compound name or formula.

1. The compound with the formula CO is called  .

2. Dinitrogen trioxide has the chemical formula  .

3. The name for Cl2O7 is  .

4. Sulfur dioxide has the chemical formula  .

5. The compound PCl5 is named  .

Choose the best answer for each question.

1. What is the correct name for N2O4?

a

Dinitrogen tetraoxygen

b

Dinitrogen tetroxide

c

Nitrogen tetroxide

d

Dinitrogen oxide

2. What is the chemical formula for carbon disulfide?

a

CS

b

CS2

c

C2S

d

CS3

1. Explain the rules for naming binary molecular compounds. Provide an example.

2. Why do we use prefixes (like mono-, di-, tri-) when naming molecular compounds, but not typically for ionic compounds?

Match each chemical formula with its correct molecular compound name.

1. CO2

 

a. Carbon tetrachloride

2. SO3

 

b. Dihydrogen monoxide

3. CCl4

 

c. Sulfur trioxide

4. H2O

 

d. Carbon dioxide