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Unit 2 Vocabulary

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Across
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The number written to the right and slightly below an element in a chemical formula; represents the number of atoms of an element present in a chemical formula.
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The number placed in front of a chemical formula in a chemical equation; represents the number of molecules of element
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A representation of a molecule are represented by their symbols and subscripts represent the number of atoms of each element
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Combined atoms of the same element
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Substances resulting from a chemical reaction
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A representation of a chemical reaction with symbols and number
Down
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A change caused by the interaction of two or more substances (reactants) resulting in the formation of new substances (products)
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The formation of a new substance with different properties; cannot be undone by physical means
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The formation of solids from a solution
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Substances that are combined and changed during a chemical reaction
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A substance made of two or more elements