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chemical reactions
Term | Definition |
---|---|
decomposition Reaction | a compound breaks down into simpler substances |
activation energy | what is needed to start a chemical reaction |
arrow | yields |
characteristics of a chemical reaction | changes in energy or changes in properties (produce a gas) (bubbles form) theirs color change |
chemical changes | alter the chemical properties of matter |
chemical equations | a shorter and easier way to show chemical reactions |
coefficient | a number placed in front of a number |
conservation of mass | the amount of matter involved in a chemical reaction does not change the total mass |
endothermic reaction | is an observable change in energy |
exothermic reaction | is an observable change in energy that shows a chemical reaction took place |
physical change | alter only the physical properties of matter which means no new substances were formed |
preipitate | a solid that form"s from solution during a chemical reaction |
product | the materials you have after a chemical reaction |
reactants | the materials you have after a chemical reaction at the begining |
replacement reaction | one part of a compound |
state of matter | solid liquid gas |