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8th grade Chemistry

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Question
Answer
Substance   A number written below and to the right of a chemical symbol in a formula  
Double Replacement   when ions in two compounds switch places  
Activation Energy   is the minimum amount of energy required for substances to react  
Chemical Reaction   process by which one or more substances undergo change to produce one or more new substances.  
The Law of Conservation of Mass   states that mass cannot be created or destroyed in ordinary chemical or physical changes.  
Decompostion   a single compound breaks down to form tow or more simpler substances.  
Exothermic   energy is released.  
Endothermic   energy is absorbed.  
Synthesis   two or more substances combine to form a single compound.  
Chemical Formula   descibes a substance using chemical symbols and numbers.  
Coefficient   a number written to the left of a chemical symbol or formula.  
Single Replacement   one element replaces another that is part of a compound. (Loner)  
Chemical Equation   is a shorthand description of a chemical reaction.  
Reactent   the starting material.  
Product   the new substance formed.  
Catlyist   speeds up a reation.  
Inhibitor   slows down a reation.  


   


 

 

 

 

 

 
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