Across
- 2. the amount of matter in something
- 3. positive electric charged
- 5. a type of temperature measurement were water freezes at 32 degrees
- 8. negative electric charge
- 9. the amount of space in something
- 10. a substance made by mixing other substances together
- 11. the quantity of something per unit volume
Down
- 1. electrons on outer layer of atom
- 4. the center of the whole atom
- 6. a particle of matter that uniquely defines a chemical element
- 7. an absolute zero scale