ICP Unit 1B Vocab Flashcards

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Pure substance

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A material that always has exactly the same composition; any sample has the same properties.

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Element

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A pure substance made of only one type of atom; cannot be broken down into simpler substances.

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Compound

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A pure substance made of two or more types of atoms bonded together in fixed ratios to form molecules.

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Chemical symbol

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A one- or two-letter abbreviation used by scientists to represent an element; the first letter is always capitalized.

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Mixture

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A combination of two or more pure substances that are not chemically bonded; substances retain their properties.

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Homogeneous mixture

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A mixture that is evenly mixed, with no easily distinguishable parts.

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Heterogeneous mixture

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A mixture with visibly different parts that can be distinguished.

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Solution

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A homogeneous mixture in which one substance dissolves evenly in another.

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Suspension

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A heterogeneous mixture in which solid particles are dispersed in a liquid but will settle into layers over time.

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Colloid

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A mixture with very small particles dispersed in a liquid; does not easily separate or filter out (e.g., milk).