Chemistry Unit 1
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Created by:
JakeTeichman on September 14, 2010
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32 terms
Terms | Definitions |
|---|---|
 Composition | How you classify matter |
| Mixtures | Physical combinations of two or more substances. Most matter occurs as this. |
| Chemistry | The science that investigates and explains the structure and properties of matter. |
| Analysis | Means to "break down" or "decompose" |
| Synthesis | means to "put together" or "compose" |
| Matter | anything that takes up space and has mass |
| Mass | the measure of the amount of matter that an object contains |
| Properties | the characteristics and behavior of matter |
| Qualitative | an observation made without measurement |
| Quantitative | an observation made with a measurement |
| Substance | matter with the same fixed composition and properties |
| Mixture | a combination of two or more substances in which the basic identity of each substance is not changed |
| physical change | a change in matter that does not involve a change in the identity of the substance |
| physical properties | characteristics of a sample of matter that can be observed or measured without any change to its identity |
| heterogeneous mixture | a mixture that does not have a uniform composition and its individual substances remain distinct |
| homogeneous mixture | a mixture or solution, that always has a uniform composition and is the same throughout |
| Solution | consists of a solute that is dissolved into a solvent |
| alloy | a solid solution that contains different metals and sometimes nonmetallic substances |
| solvent | the substance that dissolves the solute |
| aqueous solution | when the solvent is water |
| elements | the simplest form of matter |
| periodic table | organizes elements and uses chemical symbols that are universally understood |
| compound | a chemical combination of two or more different elements joined together in a fixed proportion |
| chemical formula | a combination fo the chemical symbols that show what elements make up a compound and the number of atoms of each element |
| 3 states of matter | solid, liquid, or gas |
| volatile | substances that change to a gas easily at room temperature |
| density | the amount of matter contained in a unit of volume |
| density of water | 1 g/mL |
| low density | anything lower than 1 g/mL |
| high density | anything higher than 1 g/mL |
| law of conservation of mass | matter is neither created nor destroyed |
| endothermic | chemical reactions that absorb heat energy |
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