Element, Compound, Mixture

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What is an element?

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An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H), oxygen (O), and gold (Au).

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What is a compound?

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A compound is 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 mixture?

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A mixture is a combination of two or more substances that are not chemically bonded. The individual substances retain their properties. Examples include air and salad.

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture that has a uniform composition throughout. Examples include saltwater and sweet tea.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture where the components are not uniform and can be easily distinguished. Examples include salad and sand.

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What is a molecule?

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A molecule is the smallest unit of a chemical compound that retains its chemical properties. It is made up of two or more atoms bonded together. Example: H2 (hydrogen gas).

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What is the difference between a compound and a mixture?

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A compound is a substance formed from two or more elements that are chemically bonded, while a mixture is a combination of substances that are not chemically bonded.

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What is an example of a homogeneous mixture?

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An example of a homogeneous mixture is sweet tea, where the sugar is evenly dissolved.

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What is an example of a heterogeneous mixture?

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An example of a heterogeneous mixture is a salad, where the individual ingredients can be seen and separated.

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What are the two main types of mixtures?

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The two main types of mixtures are homogeneous and heterogeneous mixtures.