Across
- 4. a unit element
- 7. a negative atom
- 8. when 2 or more substances combine but no chemical bond
- 9. measures the average kinetic energy
- 10. form of matter constantly uniform
- 12. a neutral atom
Down
- 1. a change in physical form
- 2. The same thing a an atom (its on the periodic table)
- 3. total kinetic energy of an atom
- 5. a change in its ------ properties
- 6. a substance made when 2 or more chemicals join together
- 11. a positive atom