Across
- 2. smallest form of a chemical element
- 4. mixture made up of multiple substances
- 7. the center of an atom, made of protons and neutrons
- 10. subatomic particle with a positive charge
- 11. state of matter that takes the shape of its container
- 12. the amount of matter in an object
Down
- 1. subatomic particle with no charge
- 2. number number of protons in an element
- 3. subatomic particle with a negative charge
- 4. state of matter with a definite shape and volume
- 5. state of matter with no definite shape or volume
- 6. the amount of mass per volume
- 8. molecule that has gained or lost electrons
- 9. state of matter similar to gas