| A | B |
|---|
| Compound | 2 or more different elements joined together |
| molecule | two or more atoms bonded together |
| chemical change | seperates compounds |
| physical change | seperates mixtures |
| 5CO2 (imagine the 2 is small) | there are 5 molecules in this compound |
| 2CO5 (imagine the 5 is small) | There are 2 molecules in this compound |
| 4H2O (imagine the 2 is small) | HHOHHOHHOHHO |
| 2H4O (imagine the 4 is small) | HHHHOHHHHO |
