Chapter 7 Chemical Reactions Review

What is a reactant?

• The starting substance in a chemical reaction

• Fuel

• The ending substance in a chemical reaction

• The basic particle of the chemical elements.

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What is an atom?

• The starting substance in a chemical reaction

• Fuel

• The ending substance in a chemical reaction

• The basic particle of the chemical elements.

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How do we define the term "atom" in chemistry?

• An object, diagram, or computer program that helps us understand something by making it simpler or easier to see.

• Fuel

• Small building blocks.

• The tiny pieces that all matter is made of.

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What is a product?

• The starting substance in a chemical reaction

• Fuel

• The ending substance in a chemical reaction

• The basic particle of the chemical elements.

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Which of the following is an example of an atom?

• Fe (Iron)

• NaNO3 (Sodium Nitrate)

• H20 (Water)

• CaCO3 (Calcium Carbonate)

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Define the term "substance."

• Something that can be observed about a substance

• Something that is made of all the same atoms or group of atoms

• The ending substance in a chemical reaction

• A process in which atoms rearrange

Define the term "property."

• The ending substance in a chemical reaction

• The starting substance in a chemical reaction

• Something that can be observed about a substance (ie: color, smell, boiling point, etc)

• A place where atoms stay

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How do scientists use models to study chemical reactions?

• Models make it easier to see how atoms move in chemical reactions

• Models make chemical reactions more complicated

• Scientists don't use models to study chemical reactions

• Models speed up chemical reactions

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How does a chemical reaction form new substances?

• Atoms disappear to form new substances.

• Atoms appear to form new substances.

• Atoms rearrange to form new substances.

• Atoms are created to form new substances

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T/F: Atoms change their identity during a chemical reaction.

• True

• False

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