1.2 Classification of Matter

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What is a Mixture of Elements?

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A mixture where two or more elements are combined but not chemically bonded, retaining their individual properties.

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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 Pure Element?

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A substance that consists entirely of one type of atom, such as gold (Au) or oxygen (O2).

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What is a Compound?

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A substance formed when two or more elements are chemically bonded together, such as water (H2O) or carbon dioxide (CO2).

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What is an Element?

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A pure substance that cannot be broken down into simpler substances by chemical means, consisting of only one type of atom.

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What is a Homogeneous Mixture?

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A mixture that has a uniform composition throughout, such as saltwater or air.

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What is a Heterogeneous Mixture?

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A mixture where the components are not uniformly distributed, such as salad or a mixture of sand and iron filings.

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What is a Colloid?

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A mixture where tiny particles of one substance are evenly distributed throughout another substance, such as milk or fog.

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What is a Solution?

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A homogeneous mixture where one substance (solute) is dissolved in another (solvent), like sugar in water.

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What is a Chemical Change?

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A change that results in the formation of new chemical substances, such as rusting iron or burning wood.