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chemical reactions

TermDefinition
activation energy what is needed to start a chemical reaction
arrow you read the arrows as yields in a chemical equation or formula
characteristics of a chemical reactions changes in energy or changes in properties color change precipitate forms or temperature.
chemical changes alter the chemical properties of matter
chemical equations a shorter easier way to show chemical reactions by using symbols instead of words
coefficient a number placed in front of a chemical formula in a equation
conservation of mass the amount of matter involved in a chemical reaction that does not change
decomposition reaction a compound breaks down into simpler substances
endothermic reaction an observable change in energy that shows a chemical reaction took place
exothermic reaction an observable change in energy that shows that a chemical reaction took place gives of energy makes it feel warmer
physical changes alter only physical properties of matter no new substances are formed
precipitate a solid that forms from a solution during a chemical reaction. observable changes that show a chemical reaction took place
products the materials you have after a chemical reaction
reactants the materials you have at the beginning of a chemical reaction
replacement reaction one part of a compound is displaced by an element or compound from another substance.
states of matter solid liquid gas
subscripts show the number of atoms of an element in a molecule or the ratio of elements in a compound
synthesis reaction two substances combine to form a new coumpound
Created by: 150007670