Physical and chemical properties

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What is a chemical property?

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A characteristic of a substance that can only be observed during a chemical reaction, such as flammability or reactivity.

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What is a physical property?

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A characteristic of a substance that can be observed without changing its chemical identity, such as color, shape, or melting point.

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What is flammability?

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Flammability is a chemical property that describes how easily a substance can catch fire and burn.

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What happens during a chemical change?

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A chemical change occurs when substances combine or break apart to form new substances with different properties.

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What is an example of a chemical change?

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Burning wood is an example of a chemical change because it transforms wood into ash and smoke.

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What is an example of a physical property?

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The blue color of a substance is an example of a physical property.

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What is tarnishing?

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Tarnishing is a chemical change that occurs when a metal reacts with sulfur or oxygen, resulting in a dull coating.

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What is the difference between a physical change and a chemical change?

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A physical change alters the form of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.

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What is an example of a physical change?

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Melting ice is an example of a physical change because it changes from solid to liquid without altering its chemical structure.

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What does it mean to combine substances?

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Combining substances can refer to both physical mixtures and chemical reactions, but in a chemical context, it means forming a new chemical substance.