| A | B |
|---|
| Chemistry | the study of the properties of matter and how matter changes |
| element | a substance that cannot be broken down into other substances by chemical or physical means |
| atom | the smallest particle of an element |
| symbol | one or two letters used to identify an element |
| compound | substance made of two or more elements chemically combined |
| formula | a combination of symbols that show the ratio of elements in a compound |
| mixture | two or more substances together but not chemically combined |
| physical change | change that alters the form or apperance of a substance without changing it into another substance |
| chemical change | a change in matter that produces a new substance |
| chemical reaction | a process in which substances undergo chemical change |
| weight | a measure of the force of gravity on matter |
| mass | a measure of how much matter is in an object |
| volume | the amount of space that matter occupies |
| density | the measurement of how much mass of a substance is contained in a given volume |
| International System of Units (SI) | a system of measurement based on multiples of ten used by scientist |
| chemical bond | fprce that holds two atoms together |
| molecule | combination of two of more atoms that are bonded together |
| electrolysis | process by which an electric current breaks chemical bonds |
| electrode | a metal strip that gains or loses electrons during electrolysis |
