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Chemical Reaction
Science
| Term | Definition |
|---|---|
| Chemistry | The study of the properties of matter and how matter changes. |
| Element | Is a substance that cannot be broken down into any other substances by chemical or physical means. |
| Compound | Is a substance made of two or more elements chemically combined in a specific ratio, or proportion. |
| Mixture | Is made from two or more pure substances - elements, compounds, or both - that are in the same place but not combined as a new material. |
| Solution | Is 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 is called a... |
| Chemical Change | A change in matter that new substances is called a... |
| Precipitate | A solid that forms from solution during a chemical reaction is called a... |
| Atom | The smallest particle of an element |
| Molecule | Is the combination of two or more atoms. |
| Chemical Bond | The force that holds atoms together |
| Chemical Equation | Is a shorter, easier way to show chemical reactions, using symbols instead of words. |
| Symbol | Most elements are represented by a one-letter or two-letter.. |
| Chemical Formula | A compound is represented by a "word," called a chemical formula, which shows the ratio of elements in the compound. |
| Subscript | Show the number of atoms of an element in a molecule. |
| Reactants | The materials you have at the beginning of a chemical reaction are... |
| Products | When the reaction is complete, you have different materials, called the products of the reaction. |
| Conservation of Matter | The principle stating that matter is not created or destroyed during a chemical reaction is conservation of matter. |
| Coefficent | Is a number in front of a chemical formula in the equation. |
| Synthesis | When two or more substances (elements or compounds) combine to make a more complex substance, the process is called... |
| Decomposition | Reaction breaks down compounds into simpler products. |
| Replacement Reaction | A reaction in which one element replaces another in a compound or in which two elements in different compounds trade places, is called a... |
| Exothermic Reaction | A reaction that releases energy in the form of heat is called an... |
| Endothermic Reaction | A reaction that absorbs energy is called an endothermic reaction. |
| Activation Energy | Is the minimum amount of energy that has to be added to start a reaction. |
| Concentration | Is the amount of one material in a given volume of another material. |
| Catalyst | Is a material that increases the rate of a reaction by lowering the activation energy. |
| Enzymes | Provides a surface on which reactions take place. |
| Inhibitor | A material used to decrease the rate of a reaction is called an... |
| Combustion | Is a rapid reaction between oxygen and a substance called a... |
| Fuel | Is a material that releases energy when it burns. |
| Three things are necessary to start and maintain a fire | Fuel, oxygen, and heat. |
| Water removes two parts of the fire triangle. | Water removes two parts of the fire triangle. |
Created by:
kylanwolfe
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