1. Atom – The smallest unit of matter that makes up everything around us.2. Matter – Anything that has mass and takes up space.3. Volume – The amount of space an object occupies.4. Mass – The amount of matter in an object.5. Proton6. Neutron7. Electron8. Proton – Positive charge, found in the nucleus9. Neutron – No charge (neutral), also in the nucleus10. Electron – Negative charge, moves around the nucleus