click below
click below
Normal Size Small Size show me how
Chemistry
Term | Definition |
---|---|
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 change | alter the chemical properties of matter |
chemical equations | a shorter, easier way to show chemical reactions |
coefficient | a number placed in front of a chemical formula in an equation |
conservation of mass | the amount of mass in a chemical reaction does not change |
controlling rates of reaction | concentration, temperature, surface area, catalysts, enzymes and inhibitors |
decomposition reaction | a compound breaks into simpler substances |
endothermic reaction | an observable change in energy that shows a chemical reaction took place |
physical changes | alter only the physical properties of matter |
precipitate | a solid that forms during a chemical reaction |
products | the materials you have after a chemical reaction |
reactants | the materials you have during a chemical reaction |
replacement reaction | one part of a compound is displaced by another substance |
states of matter | solid, liquid, and gas |
subscripts | the number of atoms in an element |
synthesis reaction | two substances combine to form a new compound |
exothermic reaction | an observable change in energy that shows a chemical reaction took place |