Across
- 6. a reaction that releases energy
- 7. a reaction that absorbs energy
- 9. no atoms are gained or lost during any reaction
- 10. a substance that undergoes a chemical change
Down
- 1. is a substance that lowers the activation energy of a chemical reaction
- 2. A+B-AB
- 3. AB-A+B
- 4. a substance that is the result of the chemical change
- 5. the minimum energy required to overcome the initial breaking of bonds in reactants
- 8. is the amount of energy required to pull two bonded atoms apart