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) through the breaking and forming of chemical bonds.

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What are reactants in a chemical equation?

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The substances that undergo a chemical change, found on the left side of a chemical equation.

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What are products in a chemical equation?

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The new substances formed as a result of a chemical reaction, found on the right side of a chemical equation.

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What is a coefficient in a chemical equation?

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A number placed before a chemical formula to indicate how many molecules or atoms are involved in the reaction.

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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 physical change?

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

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What is a chemical change?

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A change that results in the formation of new chemical substances, indicating a chemical reaction has occurred.

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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 compound?

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A substance formed when two or more different elements are chemically bonded together.