Properties of Matter, Pure Substances and Mixtures

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What is a chemical change?

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A chemical change is a process where one or more substances are transformed into different substances with new chemical properties, such as rusting of iron.

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What is an element?

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An element is a pure substance that consists of only one type of atom and cannot be broken down into simpler substances.

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What is a chemical property?

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A chemical property is a characteristic of a substance that can only be observed during a chemical reaction, such as reactivity with acid.

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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 combined and retain their individual properties.

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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, such as elements and compounds.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition, such as melting or freezing.

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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 in a fixed ratio.

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What does it mean for a mixture to retain original properties?

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It means that the individual components of the mixture maintain their own properties and characteristics.

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How can the components of a mixture be separated?

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The components of a mixture can be separated by physical means, such as filtration, distillation, or evaporation.

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What is an example of a chemical change?

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An example of a chemical change is the reaction of vinegar with baking soda, producing carbon dioxide gas.