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Chapter 2
| Question | Answer |
|---|---|
| Matter | •that which has mass and occupies space |
| Pure Substance | a chemical substance is a material with a specific chemical composition |
| Element | •chemical element: any of the more than 100 known substances that cannot be separated into simpler substances and that singly or in combination constitute all matter |
| Compound | •consisting of two or more substances or ingredients or elements or parts |
| Mixture | a substance consisting of two or more substances mixed together |
| Homogeneous Solution | a solution is a homogeneous mixture where one substance is dissolved in another |
| Heterogeneous Solution | Particle size distinguishes homogeneous solutions from other heterogeneous mixtures. |
| Distillation | •the process of purifying a liquid by boiling it and condensing its vapors |
| Physical Changes | concept introduced to contrast with the concept of chemical change. A physical change is any change not involving a change in the substance's chemical identity |
| Physical Properties | •A physical property is any measurable property the value of which describes a physical system's state at any given moment in time |
| Chemical Changes | bonds are broken and new bonds are formed between different atoms |
| Chemical Properties | any of a material's properties that becomes evident during a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity |
| Law of Conservation of Matter | •Matter is neither created nor destroyed, but is combined and rearranged in different ways |
Created by:
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