Classifying Matter - Flashcard 1 Practice

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What is a mixture?

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A mixture is a combination of two or more substances where each substance retains its own properties. Examples include air (a mixture of gases) and salad (a mixture of various ingredients).

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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 hydrogen (H), oxygen (O), 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 in fixed proportions. Examples include water (H2O) and carbon dioxide (CO2).

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture that has a uniform composition throughout. Examples include saltwater and air.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture where the components are not uniformly distributed, and different parts can be seen. Examples include salad and sand.

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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 that retain their individual properties, while a compound is a chemical combination of substances that results in new properties.

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What is a molecule?

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A molecule is the smallest unit of a chemical compound that retains its chemical properties, consisting of two or more atoms bonded together.

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What is the law of definite proportions?

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The law of definite proportions states that a chemical compound always contains the same proportion of elements by mass, regardless of the sample size.

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What is the law of multiple proportions?

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The law of multiple proportions states that when two elements form more than one compound, the ratios of the masses of the second element that combine with a fixed mass of the first element can be expressed as small whole numbers.

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What is a particle diagram?

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A particle diagram is a visual representation of the arrangement and behavior of particles in a substance, used to illustrate the differences between elements, compounds, and mixtures.