Elements, Compounds, and Mixtures

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What is an element?

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An element is a pure substance that consists of only one type of atom and cannot be broken down into simpler substances.

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What is a compound?

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A compound is a substance formed when two or more different types of atoms bond together in a fixed ratio.

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What is a mixture?

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A mixture is a combination of two or more substances where each retains its own properties and can be separated by physical means.

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How can you identify a compound?

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A compound can be identified by its chemical formula, which shows the types and numbers of atoms present.

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What is the difference between an element and a compound?

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An element consists of only one type of atom, while a compound consists of two or more different types of atoms chemically bonded together.

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What is an example of an element?

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An example of an element is oxygen (O), which consists only of oxygen atoms.

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What is an example of a compound?

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An example of a compound is water (H2O), which consists of two hydrogen atoms and one oxygen atom.

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What is an example of a mixture?

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An example of a mixture is air, which contains various gases such as nitrogen, oxygen, and carbon dioxide.

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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, such as saltwater.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture that does not have a uniform composition, such as a salad.