Flashcards Matter Vocabulary

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Atom

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Atoms are the smallest part of a substance that can still be recognized as that substance (the smallest unit of matter).

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Atomic Mass

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Atomic mass is the number of protons and neutrons of an element.

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Atomic Number

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Chemical Bond

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Chemical bonds are strong attractions that hold atoms together.

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Chemical Symbol

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Chemical symbols are one-, two-, or three-letter abbreviation of the name of an element.

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Chemical Formula

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Chemical formulas show the elements in a compound, each represented by its chemical symbol. The number of each type of element in the compound (other than one) is represented by a small number (the subscript) to the right of the element symbol.

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Chemical Equation

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Chemical equations are used to model chemical changes, illustrating how elements become rearranged in a chemical reaction.

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Chemical Change

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Chemical change is a change that occurs when one or more substances change into entirely new substances with different properties.

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Coefficient

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Coefficient is the number in front of the formula; it tells us how many molecules of a given formula are present.

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Compounds

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Compounds are formed when two or more atoms combine. Compounds can be represented by chemical formulas.