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17 Cards in this Set
- Front
- Back
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Chemical Change
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changes matter into one or more new substances
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Precipitate
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a solid that forms from a solution during a chemical reaction
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What happens to energy in a chemical reaction?
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Energy is either absorbed or released
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What is the most common indicator that energy has been absorbed or released?
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a change in temperature
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Formula
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a "word" using symbols and ratios
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chemical equation
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a shorter, easier way to show chemical reactions, using symbols
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symbol
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letters that represent the elements
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symbol
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letters that represent the elements
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Subscript
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"under writing" It tells you how many atoms are present of that particular element
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Coefficient
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The number placed in front of a formula. It tells how many molecules you have.
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What is the correct structure for a chemical equation?
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Reactant + Reactant -> Product + Product
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Synthesis
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When two or more substances combine to make a more complex substance
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Decomposition
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When a complex substance decomposes into simpler substances
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Replacement
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When elements trade places or replace one another
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Exothermic
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Energy is released (feels hot)
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Endothermic
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Energy is absorbed (feels cold)
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What happens to bonds during a chemical reaction?
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in a chemical reaction bonds are either formed or broken
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