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unit 6 science vocab

study for test friday

TermDefinition
chemical equation description of a reaction using element symbols and chemical formulas
chemical reaction process in which atoms of on or more substances rearrange to form one or more new substances
coefficient number placed in front of an element symbol or chemical formula in an equation
law of conservation of mass 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
product new substance produced by a chemical reaction
reactant starting substance in a chemical reaction
combustion chemical reaction in which a substance combines with oxygen and releases energy
decomposition chemical reaction in which one compound breaks down and forms two or more substances
double replacement describes a reaction in which the negative ions in two compounds switch places, forming two new compounds
single replacement describes a reaction in which one element replaces another element in a compound
synthesis chemical reaction in which two or more substances combine and form one compound
endothermic chemical reactions that absorb thermal energy
exothermic chemical reactions that release thermal energy
acid substance that produces a hydronium (H30+) when dissolved in water
base substance that produces hydroxide ions (OH-) when dissolved in water
pH scale a scale used to measure how acidic or base a solution is (ranges from 1-4)
Created by: haidyniscool
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