science Flashcards
atom
the simplest particle of matter that makes up molecules
molecule
two or more atoms chemically bonded toget her
state change
when a substance changes between a solod liquid or gas
chemical rection
a process that produces one or more new substances by breaking apart molecules into atoms and/or joining atoms together in dif combinations
physical change
a change in a substances appearance, but not its chemical composition
chemical change
a change is which a new substance is made
conservation of mass
mass and matter cannot be created or destroyed, it only changes form
chemical formula
symbols that show the ratio of atoms in a molecule
coefficient
a number placed Infront of a chemical formula that shows the number of molecules
subscript
the number below and behind a chemical symbol that shows the number of atoms for that symblol
products
the new substance(s) made by a chemical reaction produced by reactants
Reactants
The starting substance that will react with each other during a chemical reaction
