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What is an Element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means. Examples include Aluminum (Al), Oxygen (O), and Gold (Au).

Front

What is a Compound?

Back

A substance formed when two or more elements are chemically bonded together. Examples include Water (H2O) and Carbon Dioxide (CO2).

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What is a Homogeneous Mixture?

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A mixture that has a uniform composition throughout. Examples include saltwater and air.

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What is a Heterogeneous Mixture?

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A mixture that consists of visibly different substances or phases. Examples include salad and sand.

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What are Reactants in a chemical reaction?

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The starting materials that undergo a chemical change in a reaction.

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What are Products in a chemical reaction?

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The substances that are formed as a result of a chemical reaction.

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What is a Double Displacement Reaction?

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A type of chemical reaction where two compounds exchange ions or bonds to form two new compounds. Example: 3 HBr + Al(OH)3 -> 3 H2O + AlBr3.

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What is a Single Replacement Reaction?

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A type of chemical reaction where one element replaces another in a compound. Example: SnCl2 + 2Li -> 2LiCl + Sn.

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What is a Synthesis Reaction?

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A type of reaction where two or more simple substances combine to form a more complex product. Example: A + B -> AB.

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What is a Decomposition Reaction?

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A type of reaction where a single compound breaks down into two or more simpler products. Example: AB -> A + B.