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Chapter 2
Vocab List
Question | Answer |
---|---|
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 | one of a class of substances that cannot be separated into simpler substances by chemical means. |
Compound | a pure substance composed of two or more elements whose composition is constant. |
Mixture | Blend of two or more substances, that can be separated by physical means |
Homogeneous Solution | A mixture which has uniform composition and properties throughout. |
Heterogeneous Solution | Two substances that when combined to not mix together. |
Distillation | Removing one liquid from another liquid or substance, using their differences in boiling points. |
Physical changes | A change in which a substance changes from one physical state to another but no substances with different composition are formed. Example Gas to Liquid - Solid. |
Physical properties | can be observed or measured without changing the composition of matter. Physical properties are used to observe and describe matter. |
Chemical Changes | The substances are changed into other substances by use of chemical reactions |
Chemical Properties | of matter describes its "potential" to undergo some chemical change or reaction by virtue of its composition. What elements, electrons, and bonding are present to give the potential for chemical change. |
Law of Conservation of Matter | a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system |