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Chapter 2
Chapter 2 vocab
Question | Answer |
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Matter | the substance or substances of which any physical object consists or is composed |
Pure Substance | A sample of matter, either an element or a compound, that consists of only one component with definite physical and chemical properties and a definite composition |
Element | a substance made up of atoms with the same atomic number |
Compound | Substances composed of two or more elements which do not vary in composition from sample to sample, and which have fixed and definite physical properties |
Mixture | A system of two or more distinct chemical substances |
Homogeneous Solution | Homogeneous mixture of two or more substances. |
Heterogeneous Solution | A mixture or material consisting of more than one substance. |
Distillaion | the volatilization or evaporation and subsequent condensation of a liquid, as when water is boiled in a retort and the steam is condensed in a cool receiver |
Physical Changes | any process involving a substance's change from one state (gas, liquid, solid) to another without alteration of the chemical composition |
Physical Properties | can be observed or measured without changing the composition of matter. |
Chemical Changes | any change from one state (gas, liquid, solid) which is accompanied by alteration of the chemical composition; any process in which one or more substances are changed into one or more different substances |
Chemical Properties | a characteristic of a substance that becomes known during a chemical reaction; also, a characteristic depending on the arrangement of the atoms in the molecule |
Law of Conservation of Matter | a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system |