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. Examples include oxygen (O), hydrogen (H), 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 chemically bond 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. Examples include air, salad, and sand and salt.

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How can you identify an element?

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An element can be identified by its unique atomic number, which represents the number of protons in its nucleus.

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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 elements and their ratios, such as H2O for water.

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How can you identify a mixture?

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A mixture can be identified by the fact that its components retain their individual properties and can be separated by physical means.

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What is the difference between an element and a compound?

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An element is a single 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 iron (Fe).

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What is an example of a compound?

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An example of a compound is sodium chloride (NaCl), commonly known as table salt.

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What is an example of a mixture?

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An example of a mixture is a fruit salad, which contains various fruits mixed together.