Topic 9 Vocabulary Flashcards

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Atom

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Basic particle of matter; the smallest particle of an element that has the properties of that element.

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Chemical property

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A characteristic of a substance that is observed during a chemical reaction.

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Chemical reaction (change)

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A process that rearranges chemical bonds forming new substances with different chemical properties.

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Compound

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A substance made of two or more elements chemically combined in a specific ratio or proportion; molecules are also compounds.

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Element

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A pure substance that cannot be broken down into other substances by chemical or physical means.

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Law of Conservation of Matter

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Matter cannot be created or destroyed in an isolated system.

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Molecule

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

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Physical change

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A change that affects the form of a substance but not the chemical makeup.

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Physical property

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Properties that can be observed/measured without changing the chemical makeup of a substance.

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Product

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A substance formed as a result of a chemical reaction (change).