| A | B |
|---|
| atom | the smallest particle of an element |
| molecule | the combination of two or more atoms |
| chemical bond | the force that holds atoms together |
| chemical reactions | occur when chemical bonds are either formed or broken |
| chemical equation | shorter, easier way to show chemical reactions using symbols |
| symbol | one letter or two letters that represent elements |
| chemical formula | shows the ratio of elements in a compound |
| conservation of mass | the amount of matter in a reaction does not change |
