Elements, Compounds, and Mixtures/Balancing Equations

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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 and can be separated by physical means.

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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 cannot be separated into simpler substances by physical methods.

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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.

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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.

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How can you tell if a chemical equation is balanced?

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A chemical equation is balanced when the number of atoms of each element is the same on both sides of the equation.

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What is the difference between a mixture and a compound?

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A mixture is a physical combination of substances, while a compound is a chemical combination of elements.

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Can mixtures be separated by physical methods?

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Yes, mixtures can be separated by physical methods such as filtration, distillation, or chromatography.

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What are the two types of mixtures?

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The two types of mixtures are homogeneous mixtures (uniform composition) and heterogeneous mixtures (non-uniform composition).

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

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What is a chemical reaction?

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A chemical reaction is a process that involves the rearrangement of the molecular or ionic structure of a substance.