Atoms and Molecules Video Questions 1. What is matter? 2. What are the subatomic particles that make up atoms? 3. How does electromagnetic force hold subatomic particles together? 4. What is nuclear force? 5. What makes one atom different from another? 6. Approximately how many elements can be found on the periodic table? 7. What is the periodic Table of the Elements? 8. What does an elements atomic number tell about the atoms that make up the element? 9. What does an elements atomic mass tell about the atoms that make up that element? 10. How do atoms join together to make different substances? 11. What is the difference between atoms and molecules? 12. What are the three phases of matter? 13. How do the vibrations of atoms relate to the phases of matter?