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8SC classify matter
| Term | Definition |
|---|---|
| pure substance | a substance made of only one type of particle; cannot be broken down physically |
| element | pure substance made of only one kind of atom |
| compound | substance made of two or more elements that are chemically combined(bonded) |
| atom | smallest particle of an element |
| molecule | smallest particle of a compound; made of two or more bonded atoms |
| mixture | combination of two or more substances that are not chemically combined |
| heterogeneous mixture | mixture in which the different materials can be easily distinguished |
| colloid | heterogeneous mixture whose particles never settle |
| Tyndall Effect | scattering of a light beam as it passes through a colloid |
| suspension | heterogeneous mixture -large particles that settle out and separate into layers over time |
| homogeneous mixture | mixture that is uniform in composition; components are evenly distributed and not easily distinguished |
| solution | another name for homogeneous mixture |
| physical property | a characteristic substance that does not involve a chemical change.Ex. melting,/boiling point, solubility, density, color, or hardness |
| ductile | term used to describe the physical property of a material that can be pulled out into a long wire |
| malleable | term used to describe physical property of a material that can be shaped, hammered, or dented |
| chemical property | property of matter that describes a substance's ability to participate in chemical reactions |
| physical change | change in a substance that does not change its identity; no chemical reaction occurs |
| chemical change | change that occurs in which one or more substances change into entirely new substances with different properties |
| law of conservation of matter | principle that the total amount of matter is constant during any physical or chemical change (matter is neither created of destroyed during these types of changes); the total amount of mass is equal before and after the reaction |
| flammability | ability to burn - chemical property |