Module 4: Classifying Matter and Its Changes – Flashcards
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Unlock answersSubstance that contains only one element or compound (99) |
| Pure substance |
| Substance that contains different compounds and/or elements (99) |
| Mixture |
Mixture with a composition that is always the same no matter what part of the sample you are observing (103) |
| Homogeneous mixture |
Mixture with a composition that is different depending on what part of the sample you are observing (103) |
| Heterogeneous mixture |
A change that affects the type of molecules or atoms in a substance (106) |
| Chemical change |
A change in which the atoms or molecules in a substance stay the same (106) |
| Physical change |
Process by which a substance changes from one phase (solid, liquid, or gas) to another phase (109) |
| Phase change |
Process by which a substance changes from its solid phase to its liquid phase (112) |
| Melting |
Process by which a substance changes from its liquid phase to its solid phase (109) |
| Freezing |
Process by which a substance changes from its liquid phase to its gas phase (109) |
| Boiling |
Process by which a substance changes from its gas phase to its liquid phase (109) |
| Condensing |
One of three states of matter: solid, liquid, or gas (109) |
| Phase |
Theory that the atoms or molecules which make up a substance are in constant motion, and the higher the temperature, the greater their speed. (111) |
| Kinetic Theory of Matter |
Temperature at which a substance changes from its solid phase to its liquid phase (112) |
| Melting point |
Temperature at which a substance goes from its liquid phase to its gas phase. (112) |
| Boiling point |
Process by which one or more substances change into one or more different substances (115) |
| Chemical reaction |
A representation of a chemical reaction (115) |
| Chemical equation |
A molecule composed of two identical atoms (115) |
| Homonuclear diatomic |
| Nitrogen, oxygen, chlorine, and fluorine are 4 of the 8 homonuclear diatomics. Name the other 4. |
| bromine, iodine, astatine, hydrogen |
| Bromine, iodine, astatine, and hydrogen are 4 of the 8 homonuclear diatomics. Name the other 4. |
| Nitrogen, oxygen, chlorine, fluorine. |
Why are the folowing elements significant? N2, O2, Cl2, F2, Br2, I2, At2, H2. (115) |
| They are not composed of individual atoms; they are homonuclear diatomics. |
| Substances found on the right side of a chemical equation (116) |
| Products |
