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chemical reactions

QuestionAnswer
Activation energy what is needed to start a chemical reaction
arrow you read the arrow as yields in a chemical equation or formula
characteristics of a chemical reaction changes in energy or changes in properties
chemical changes alter the chemical properties of matter
coefficiant a number placed in front of a chemical formula in an equation
conservation of mass the amount of matter invlolved in a chemical reaction does not change
decomposition reaction a compound breaks down in simpler substances
endothermic reaction an observable change in energy that shows a chemical reaction took place
exothermic reaction an observable change in energy that show a chemical reaction took place
physical changes alter only the physical properties of matter
precipitate a solid that forms from a solution during a chemical reaction
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 an element in a molecule or the ratio of elements in a compound
synthesis reaction 2 substances combine to form a new compound
Created by: 150011892