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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. |