8.6ABE Vocab Flashcard

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Coefficient

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The big number in front of a chemical formula that tells you how many molecules of that substance there are.

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Chemical Equation

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A representation of a chemical reaction that uses symbols and an arrow to show the relationship between the reactants and the products (Ex. H2 + O --> H2O).

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Element

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A substance that cannot be broken into other substances.

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Atom

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The smallest piece of an element; a basic particle of matter; atoms make up elements and compounds.

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Mixture

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A combination, or mix, of two or more substances.

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Chemical Symbol

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A one or two-letter representation of an element (e.g., H for Hydrogen, O for Oxygen).

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Compound

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

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Molecule

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The smallest unit of a compound that retains the properties of that compound, made up of two or more atoms bonded together.

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Law of Conservation of Matter/Mass

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A principle stating that matter cannot be created or destroyed in a chemical reaction.

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Reactants

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The starting substances in a chemical reaction, found on the left side of a chemical equation.