| A | B |
|---|
| atom | the smallest particle of an element |
| chemistry | the study of the properties of matter and how matter changes |
| chemical property | a characteristic that is observed when a substance interacts with another substance |
| chemical change | a change in the matter that produces new substances |
| chemical bond | the force that holds atoms together |
| compound | a substance made of two or elements chemically combined |
| density | the measurement of how much mass of a substance is contained in a given volume |
| eclectrolysis | a processs by which an electric current breaks chemical bonds |
| electrode | a metal strip that gains or loses electrons during electrolysis |
| element | a substance composed of a single kind of atom. Elements cannot be broken down into other substances by chemical or physical means |
| energy | The ability to do work or cause change;for example, to move an object some distance |
| International System of Units(SI) | a system of measurement based on multiples of ten and on established measures of mass,length, and time; used by scientists to measure the properties of matter |
| mass | a measure of how much matter is in an object |
| mixture | two or more substances that are mixed together but not chemically combined |
| molecule | a combination of two or more atoms that are bonded together; the smallest unit of most compounds |
| physical bond | a change that alters the form or appearance of a substance but doen't make the material into another substance |
| physical property | a characteristic of a substance that can be observed without changing the substances into something else |
| substance | a single kind of matter that has distinct physical and chemical properties |
| volume | the amount of space that matter occupies |
| weight | a measure of the force gravity on an object |
