Chemical Reactions

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What is a chemical reaction?

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A process where substances (reactants) transform into new substances (products) with different properties.

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What is the law of conservation of mass?

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In a chemical reaction, mass is neither created nor destroyed; the total mass of reactants equals the total mass of products.

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What is a reactant?

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A substance that undergoes change during a chemical reaction.

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What is a product?

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A substance that is formed as a result of a chemical reaction.

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What is a catalyst?

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A substance that increases the rate of a chemical reaction without being consumed in the process.

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What is a molecule?

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A group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

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What is an atom?

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The basic unit of a chemical element, consisting of a nucleus surrounded by electrons.

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What is a chemical equation?

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A symbolic representation of a chemical reaction, showing the reactants and products.

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What are indicators of a chemical reaction?

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Color change, gas production, temperature change, and formation of a precipitate.

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What is an endothermic reaction?

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A reaction that absorbs energy (heat) from its surroundings.