Unit 3: Chemical Reactions and Equations Final Assessment Review

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What is a compound?

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A compound is a substance made of two or more different elements that are chemically bonded together.

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What is a mixture?

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A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

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What is an element?

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An element is a pure substance that cannot be broken down into simpler substances by chemical means.

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What is a chemical reaction?

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A chemical reaction is a process in which substances (reactants) are transformed into new substances (products) through the breaking and forming of chemical bonds.

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What are reactants?

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Reactants are the starting substances in a chemical reaction that undergo change.

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What are products?

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Products are the substances that are formed as a result of a chemical reaction.

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is conserved.

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What is a chemical equation?

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A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture that has a uniform composition throughout, such as saltwater.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture that has a non-uniform composition, such as a salad.