Across
- 2. smallest unit of element
- 5. one or more substances change
- 7. substance produced during chemical reaction
- 8. the total amount of kinetic energy
- 9. heat and energy is absorbed
- 10. adds molecules
Down
- 1. heat and energy is released
- 3. relating to or produced by chemical
- 4. takes part in and undergoes change
- 6. group of atoms bonded