| A | B |
|---|
| Matter | anything that has mass and takes up space |
| Pure Substance | matter that has a uniform and definite composition; an element or a compound |
| Element | the simplest forms of matter that can exist under normal lab. conditions |
| Compound | substances that can only be separated by chemical changes; once combined, they lose their original identity and properties |
| Ionic compound | a compound composed of pos. and neg. ions |
| Molecular compound | a compound composed of neutral atoms |
| Mixture | a physical blend of two or more substances |
| Homogeneous mixture | uniform throughout, also a solution (air, tapwater); components are evenly distributed |
| Heterogeneous mixture | one that is not uniform in composition; consists of two or more phases |
| Solution | a homogeneous mixture -- aq |
| Atom | the smallest particle of an element that retains the properties of that element |
| Molecule | a neutral chemically bonded group of atoms that act as a unit and the smallest particle of a substance that stable exists and retains the properties of the substance |
| Molecule | Chemical union of 2 or more atoms |
| ion | formed by the gain or loss of an electron |
| ion | a charged particle |
| property | a uniqe set of identifying characteristics |
| physical property | a quality of condition of a substance that can be observed or measured without changing the substance's composition |
| chemical property | ability of a substance to undergo a chemical reaction and to form new substances |
| physical change | composition is not changed; only phys. props. are altered; identifying characteristics of a substance remain the same |
| chemical change | one or more substances change into new substances; a change in which new substances with different set of props. are formed |
| solid | matter that has a definite shape and volume; particles are very close -restricted in motion |
| liquid | a form of matter that flows, has a fixed volume, and takes the shape of its container; no definite shape |
| gas | a form of matter that takes both the shpae and volume of its container |
| vapor | describes the gaseous state of a substance that is generally a liquid or sold at room temp.; no definite shape, particles are very far apart and independent |
| particles | may be atoms, molecules, or ions |
| alloy | a homogeneous mixture of metals |
