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What is a pure substance?

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A pure substance is a material that has a constant composition and consistent properties throughout. It can be an element or a compound.

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What best represents a compound in particle models?

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A compound is represented by a model where different types of atoms are chemically bonded together.

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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. It consists of only one type of atom.

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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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What is the difference between a compound and a mixture?

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A compound is a substance formed when two or more elements 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 compound?

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Water (H2O) is an example of a compound, as it is made up of hydrogen and oxygen atoms chemically bonded together.

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What is an example of an element?

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Oxygen (O) is an example of an element, as it consists of only oxygen atoms.

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What is an example of a mixture?

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Air is an example of a mixture, as it contains different gases that are not chemically bonded.

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How can you identify a compound in a chemical formula?

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A compound's chemical formula contains two or more different elements, such as H2O for water.

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What is the significance of chemical bonds in compounds?

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Chemical bonds hold the atoms together in a compound, determining its properties and behavior.