Pure Substances and Mixtures Flashcard

Front

What is a mixture?

Back

A mixture is matter that contains two or more substances that differ in physical and chemical properties.

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What is a heterogeneous mixture?

Back

A heterogeneous mixture is a type of mixture where the substances are not evenly mixed, and you can see all the different substances that it is made of.

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What is the smallest unit of matter?

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The smallest unit of matter is an atom.

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What is a homogeneous mixture?

Back

A homogeneous mixture is a type of mixture where the substances are evenly mixed, and you cannot see the different substances that it is made of.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together.

Front

What distinguishes a pure substance from a mixture?

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A pure substance has a uniform and definite composition, while a mixture contains two or more substances that retain their individual properties.

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Can you give an example of a heterogeneous mixture?

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An example of a heterogeneous mixture is a salad, where you can see the individual ingredients.

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Can you give an example of a homogeneous mixture?

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An example of a homogeneous mixture is saltwater, where the salt is evenly dissolved in the water.

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What is the difference between an element and a compound?

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An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements that are chemically combined.

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What is the process of separating a mixture called?

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The process of separating a mixture is called filtration, distillation, or chromatography, depending on the method used.