| Term | Definition |
|---|
| Chemical reactions | a process in which one or more substances changes to make one or more new substances |
| law of conservation of energy | the law that states that energy cannot be created or destroyed but can be changed from one form to another |
| exothermic reaction | reactions that give off energy (heat light ect.) |
| endothermic reaction | energy is taken in |
| precipitate | a solid that is produced as a result of a chemical reaction |
| some signs of chemical reactions | Gas formation, Solid formation, Energy change (light, heat, or electrical energy), color change |
| Diatomic Molecules | two atoms baonded together |
| Chemical bond | a force that holds two atoms together in a molecule |
| chemical formula | a short hand way to use chemical symbols and numbers to represent a substance |
| subscript | a number written below and to the right of a chemical symbol in a formula |
| chemical equation | a representation of a chemical reaction that uses symbols to shoe the relationship between the reactants and the products |
| reactant | a substance or molecule that participates in a chemical equation |
| product | a substance that forms in a chemical reaction |
| law of conservation of energy | the law that states that mass cannot be created or destoryed in ordinary chemical and physical changes |
| coefficient | a number placed in front of a chemical symbol or formula |
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