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chemistry part 2

QuestionAnswer
activation energy what is needed to start a chemical reaction
arrow means yeild
characteristics of a chemical reaction changes in or changes in properties
chemical changes alter the chemical properties of matter new substaces with new properties are formed
chemical equations a shorter easier way to show chemical reactions by using symbols instead of words
coefficent a number placed in front of a chemical formula in a equations tells how many atoms or moluclues of each reactant
conversation of mass the amount of matter involved in a chemical reaction does not change the total mass of the reactants must equal the total mass
decomposition reaction a compound breaks down into simpler substaces
endothermic reaction an observable change in energy that shows a chemical reaction took place a reaction that takes heat from the solution
physical change alter only the physical properties of matter no new substances are formed can be in any sized
preciptate a solid that forms solution during a chemical reaction observable change that took place
products the materials you have after a chemical reaction written on the right side of the formula
reactants the materials you have at the being of the chemical reaction
replacement reactants one part of a compound is displaced by an element or compound from another substace
states of matter solid liquid gas
subscripts show the number of atoms or an element in a molecloue
synthesis reaction 2 substances combine to form a new compound
Created by: 150003549
 

 



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