| A | B |
|---|
| Atom | the smallest unit of an element that maintains the properties of that |
| element | a pure substance made of only one kind of atom |
| chemical | any substance that has a definite composition |
| chemical change | a change in which one or more substances are converted into |
| chemical property | the ability of a substance to undergo a change that |
| chemistry | the study of the composition, structure, and properties of matter and |
| compound | a substance that is made from the atoms of two or more elements |
| condensation | the process by which a gas changes to a liquid |
| element | a pure substance made of only one kind of atom |
| extensive property | a property that depends on the amount of matter that is |
| deposition | the change of state from a gas directly to a solid |
| gas | the state of matter in which a substance has neither definite volume nor |
| freezing | the physical change of a liquid to a solid by the removal of heat |
| evaporation | the process by which particles escape from the surface of a |
| heterogeneous | not having a uniform composition throughout |
| homogeneous | having a uniform composition throughout |
| intensive property | a property that does not depend on the amount of matter |
| melting | the physical change of a solid to a liquid by the addition of heat |
| liquid | the state of matter in which the substance has a definite volume but an |
| mixture | a blend of two or more kinds of matter, each of which retains its own |
| physical change | a change in a substance that does not involve a change in the |
| physical property | a characteristic that can be observed or measured without |
| pure substance | a substance that has a fixed composition and differs from a |
| solid | the state of matter in which the substance has definite volume and definite |
| sublimation | the change of state from a solid directly to a gas |
