Elements, Compounds and Mixtures

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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 compound?

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A compound is a substance formed when two or more different elements are chemically bonded together. For example, water (H2O) is a compound made of hydrogen and oxygen.

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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. Each substance retains its own properties.

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What is the difference between a compound and a mixture?

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A compound is made of two or more elements chemically combined, while a mixture is made of two or more substances that are physically combined.

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What are atoms?

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Atoms are the basic building blocks of matter. They are the smallest units of an element that retain the properties of that element.

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What are molecules?

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Molecules are groups of two or more atoms bonded together. They can be made of the same or different elements.

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What is an example of a mixture?

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An example of a mixture is a salad, which contains various ingredients like lettuce, tomatoes, and cucumbers that are not chemically combined.

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What is an example of a compound?

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An example of a compound is carbon dioxide (CO2), which consists of one carbon atom and two oxygen atoms chemically bonded together.

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What happens when elements combine to form a compound?

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When elements combine to form a compound, they undergo a chemical reaction that results in the formation of a new substance with different properties.

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Can a mixture be separated into its components?

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Yes, a mixture can be separated into its components by physical means, such as filtration or evaporation.