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18 Cards in this Set
- Front
- Back
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Chemical equation
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shorter, easier way to show chemical reactions, using symbols instead of words
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Symbol
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a one or two letter set of characters that is used to identify elements
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Chemical formula
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a combination of symbols that represent the elements in a compound
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subscript
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a number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound
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reactant
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a substance that enters into a chemical reaction
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product
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a substance formed as a result of a chemical reaction
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coefficient
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a number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction
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synthesis
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a chemical reaction in which two or more simple substances combine to form a new, more complex substance
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decomposition
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a chemical reaction that breaks down a compound into simpler products
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replacement reaction
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a reaction in which one element replaces another in a compound; or when two elements in two compounds trade places
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exothermic reaction
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a reaction that releases energy in the form of heat
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activation energy
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the minimum amount of energy that has to be added to get a chemical reaction started
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concentration
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the amount of one material in a certain volume of another material
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catalyst
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a material that increases the rate of a chemical reaction by lowering the activation energy
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enzymes
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a biological catalyst that lowers the activation energy of reactions in cells
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inhibitor
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a material that decreases the rate of a reaction
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combustion
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a rapid reaction between oxygen and fuel that produces thermal energy
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fuel
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a material that releases energy when it burns
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