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ChemicalInteractions
Chapter one vocabulary.
| Term | Definition |
|---|---|
| Chemistry | The study of the properties of matter and how matter changes |
| Element | A substance that cannot be broken down into any other substance by chemical or physical means. |
| Compound | A substance made of two or more elements chemically combined in a specific ratio, or proportion |
| Mixture | Two or more substances that are mixed together but not chemically combined. |
| Solution | A well-mixed mixture |
| Physical Change | A change that alters the form or appearance of a material but does not make the material into another substance |
| Chemical Change | A change in a matter that produces a new substance |
| Chemical Reaction | The process in which substances undergo chemical change that results in the formation of new substances |
| Precipitate | A solid that forms from a solution during a chemical reaction. |
| Atom | The smallest particle of an element |
| Molecule | The combination of two or more atoms |
| Chemical Bond | The force that holds atoms together |
| Chemical Equation | A short, easy way to show chemical reactions, using symbols instead of words |
| Symbol | A one or two letter set of characters that is used to identify elements |
| Chemical Formula | A combination of symbols that represent the elements in a compound |
| Subscript | A number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound |
| Reactants | A substance that enters into a chemical reaction |
| Products | A substance formed from a chemical reaction |
| Conservation of Mass | The principle stating that matter is not created or destroyed during a chemical reaction |
| Coefficient | A number in front of the chemical formula in the equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction |
| Synthesis | A chemical reaction in which two or more simple substances combine to form a new, more complex substance |
| Decomposition | A chemical reaction that breaks down compounds into simpler products |
| Replacement Reaction | A reaction in which one element element replaces another in a compound; or when two elements in a different compounds trade places |
| Exothermic Reaction | A reaction that releases energy in the form of heat |
| Endothermic Reaction | A reaction that absorbs energy in the form of heat |
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14tcamilli
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