| A | B |
|---|
| molecule | group of atoms |
| compound | substance that is made of more than one element |
| mixture | combination in which no new substances are formed |
| solution | one substance in dissolved in another |
| physical change | a change in matter that does not change the molecules |
| chemical change | a change in a substance's molecules |
| chemical reaction | chemical changes |
| acid | made of moecules with a + charge |
| base | made of molecules with a - charge |
| alkalis | base that can be dissolved in water |
