12048629
Description
Flashcards by Laura Renninger, updated more than 1 year ago
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Created by Laura Renninger
about 6 years ago
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| Question | Answer |
| Chemical Reaction | A process in which atoms of one or more substances rearrange to form one or more new substances |
| Chemical Bond | An attraction between atoms when electrons are shared, transferred, or pooled |
| Chemical Equation | A description of a reaction using element symbols and chemical formulas *Must be balanced* Reactant + Reactant -> Product + Product |
| Reactants | The starting substances in a chemical reaction |
| Products | The substances produced by the chemical reaction |
| Law of Conservation of Mass | The total mass of the reactants BEFORE a chemical reaction is the same as the total mass of the products AFTER the chemical reaction |
| Coefficient | A number placed in front of an element symbol or chemical formula in an equation |
| Synthesis | Two or more substances combine and form one compound |
| Decomposition | One compound breaks down and forms two or more substances |
| Single-Replacement | One element replaces another element in a compound |
| Double-Replacement | Negative ions in two compounds switch places, forming two new compounds |
| Combustion | A substance combines with oxygen and releases energy. |
| Endothermic | Chemical reactions that absorb thermal energy reactants + thermal energy -> products |
| Exothermic | A chemical reaction that releases thermal energy reactants -> products + thermal energy |
| Activation Energy | Minimum amount of energy needed to start a chemical reaction *different reactions have different activation energies |
| Catalyst | Substance that increases reaction rate by lowering activation energy of the reaction |
| Enzyme | A catalyst that speed sup chemical reactions in living cells |
| Inhibitor | A substance that slows or stops a chemical reaction |
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