Chemistry Flashcards

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Element

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A substance that cannot be separated or broken down into simpler substances by chemical means.

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Compound

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A substance made up of atoms of two or more different elements by chemical bonds.

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Chemical symbol

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A one-, two-, or three-letter abbreviation of the name of an element.

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Chemical formula

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A combination of chemical symbols and numbers to represent a substance.

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Atom

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The smallest unit of an element that maintains the properties of that element.

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Molecule

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A group of atoms that are held together by chemical forces.

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Periodic table

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An arrangement of the elements in order of their atomic numbers.

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Pure substance

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A sample of matter, either a single element or single compound, that has definite chemical and physical properties.

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Structure

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What something looks like or how it is made

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Function

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What something’s purpose is or what it does