| A | B |
|---|
| vapor | gaseous state of substance that is a liquid or solid at room temperature |
| mixture | a physical blend of two or more components |
| product | substance formed in a chemical reaction |
| filtration | separation process that can be used for separating a solid from a liquid using a porous barrier |
| distillation | separation process that uses the difference in boiling points between components |
| mass | amount of matter an object contains |
| chemical reaction | process in which substances are changed into different substances |
| compound | composed of two or more substances chemically combined in a fixed proportion |
| element | substance that cannot be changed into simpler substances by chemical means |
| homogeneous mixture | mixture with uniform composition and properties |
| heterogeneous mixture | mixture that is not uniform in composition |
| reactant | starting substance in a chemical reaction |
| physical property | a characteristic of matter that can be observed or measured without changing the substance's composition |
| condensation | the energy releasing process in which a gas or vapor becomes a liquid |
| electron | a negatively charges, fast-moving particle with an extremely small mass |
| evaporation | the process in which vaporization only occurs at the surface of a liquid |
| sublimation | phase change that occurs from a solid state directly to a vapor |
| liquid | a form of matter that flows, has definite volume and indefinite shape |
| gas | a form of matter that flows, has indefinite volume and indefinite shape |
| solid | a form of matter that has definite volume and definite shape |
| mass number | the number that appears at the end of an isotope's name that represents the sum of the protons and neutrons in the nucleus of the atom |
| atomic number | the number of protons within the nucleus of an atom that determines the element represented |
| neutron | a neutral, subatomic particle that resides in the nucleus of an atom |
| proton | a positively charged, subatomic particle that resides in the nucleus of an atom |
| nucleus | the extremely small, positively charged, dense center of an atom |
| phase change | a transition of matter from one state to another |
| solution | a homogeneous mixture that may be comprised of solids, liquids, or gases |
| substance | matter that has a definite and unchanging composition throughout |
| valence electrons | the electrons in an atom's outermost energy level |
