| A | B |
|---|
| chemical equation | short way to show a chemical reaction |
| conservation of matter | matter is neither created or destroyed |
| open system | matter can enter from or escape to the surroundings |
| closed system | matter is not allowed to enter or leave |
| coefficient | a number placed in front chemical formula in an equation |
| synthesis | two or more elements or compounds combine to make a more complex substance |
| decomposition | compounds breaking down into smaller products |
| replacement | one element replacing another in a compound |
