| Flap 1 | Flap 2 |
| made up of elements and has mass and volume | matter |
| the smallest particle of an element that still has the properties of an element | atom |
| a substance that cannot be broken apart into other substances called chemical bonds | element |
| two or more atoms joined together by certain forces of attraction | molecule |
| a particle with no charge | neutron |
| small central core of an atom | nucleus |
| a particle with a positive electrical charge | proton |
| a particle with a negative charge and evenly placed through an atom | electron |
