Chemical Reactions

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What is a chemical change?

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A chemical change is a process where substances combine or break apart to form new substances, often with different properties.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

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What happens to a copper penny over time?

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A copper penny can turn greenish due to a chemical change called oxidation.

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What is an example of a physical change?

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Getting a haircut is an example of a physical change.

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What are reactants in a chemical reaction?

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Reactants are the starting substances that undergo a chemical change to form new substances.

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What are products in a chemical reaction?

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

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How many aluminum atoms are in the compound 4Al2O3?

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There are 8 aluminum atoms in the compound 4Al2O3.

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What is an example of a chemical change?

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Rust forming on metal is an example of a chemical change.

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What is the difference between a chemical change and a physical change?

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A chemical change results in new substances, while a physical change does not change the chemical identity of a substance.

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What is oxidation?

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Oxidation is a chemical reaction where a substance loses electrons, often resulting in a change in color or formation of new substances.