Across
- 5. Written form of a chemical reaction
- 7. Formed the basis of atomic theory as we know it today
- 8. determined that electrons occupy set energy levels
- 10. chemical reaction that releases energy
- 11. electrons are given and taken
- 12. Discovered the nucleus
- 15. Discovered the electron
- 16. electrons are shared
- 18. Matter cannot be created or destroyed
- 20. minimum energy required to start a chemical reaction
Down
- 1. Substance formed during the reaction
- 2. electrons flow in an electron sea
- 3. Substance Undergoes change
- 4. organized plan for gathering, organizing, and communicating information
- 6. chemical reaction that absorbs energy
- 9. speed of any chemical reaction
- 13. Philosopher from Ancient Greece
- 14. electrons in the outermost shell
- 17. amount of energy required to pull two atoms apart
- 19. mass of an individual atom