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 new substances with new properties are formed. |
Chemical Equations | a shorter easier way to show chemical reactions. |
coefficient | a number placed in front of a chemical formula is an equation |
conservation of mass | the amount of matter involved in a chemical reaction does not change . |
controlling rates of a reaction | concentration, temp, surface area, catalysts ,enzymes and inhibitors |
decomposition reaction | a compound breaks down into a simpler substance |
endothermic reaction | observable change in energy that shows a chemical reaction took place (makes it feel cooler) |
exothermic reaction | observable change in energy that shows a chemical reaction took place (heat is given off) |
physical changes | alter only the physical properties of matter no new substances are formed |
precipitate | solid that forms from solution during a chemical reaction |
products | materials you have after a chemical reaction |
reactants | materials you have at the begging of a chemical reaction |
Replacement reaction | one part of a compound is displayed by an element or compound |
states of matter | solid liquid gas |
sudscripts | show the number of atoms of an element in a molecule or the ration of elelments |
synthesis reaction | two substances combine to form a new compound |