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Chemistry Vocab
Flash Cards
| Term | Definition |
|---|---|
| model | Physical, mental, and other representations of an idea to help people understand a concept that they cannot observe. |
| atom | The smallest particle of any molecule. |
| molecule | Two or more atoms bonded together |
| chemistry | The study of properties of matter and how matter changes. |
| matter | Anything that has mass and occupies space. |
| mixture | Two or more substances that are mixed together but not chemically combined. |
| bonds | The force that holds atoms together. |
| reactants | A substance that causes a chemical reaction. |
| law of conservation of mass | The principle stating that matter is not created nor destroyed during a chemical reaction. |
| products | A substance formed due to a chemical reaction. |
| endothermic reactions | A reaction that absorbs energy in the form of heat. |
| exothermic reactions | A reaction that releases energy in the form of heat. |