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24 Cards in this Set
- Front
- Back
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Chemical reaction
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a process in which atoms of one or more substances rearrange to form one or more new substances
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physical property
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what you observe, is the shape, state of matter, size, and color
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chemical property
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a property change, is the flammability and ability to react
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change in property (color, odor, formation of bubbles, formation of a precipitate, temperature) and a change in energy (warming or cooling, release of light)
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signs a chemical reaction has taken place
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chemical equation
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a description of a reaction using element symbols and chemical formulas
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reactants
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the starting substances in a chemical reaction
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products
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the substances produced by the chemical reaction
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arrow
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yields, produces
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law of conservation of mass
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states that the total mass of the reactants before a chemical reaction is the same as the total mass of the products after the chemical reaction
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coefficient
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a number placed in front of an element symbol or chemical formula in an equation
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synthesis reaction
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a type of chemical reaction in which two or more substances combine and form one compound (2 reactants, 1 product)
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decomposition reaction
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where one compound breaks down and forms two or more substances (1 reactants, 2 product)
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single-replacement reaction
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where one element replaces another element in a compound
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double-replacement reaction
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where the negative ions in two compounds switch places, forming two new compounds
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combustion reaction
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a chemical reaction in which a substance combines with oxygen and releases energy
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endothermic reaction
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a chemical reaction that absorbs thermal energy
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exothermic reaction
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a chemical reaction that releases thermal energy
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activation energy
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the minimum amount of energy needed to start a chemical reaction
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surface area, temperature, concentration and pressure
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factors that effect a reaction rate
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slow reaction rate
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caused by less surface area, lower temperatures, and lower concentration
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fast reaction rate
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caused by more surface area, higher temperatures, and a higher concentration
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catalyst
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a substance that increases reaction rate by lowering the activation energy of a reaction
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enzyme
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a catalyst that speeds up chemical reactions in living cells
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inhibitor
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a substance that slows, or even stops, a chemical reaction
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