Across
- 3. the substances are used as starting material
- 4. is a written presentation of a chemical reaction
- 5. a stable elementary particle that has a negative electric charge
- 6. is the treatment of living beings towards others
- 9. is the process by which elements in a system undergo chemical changes to suffer a transformation
- 10. when elements have a communication relationship between them
- 12. they are a strong oxidant that can be used in cleaning
Down
- 1. matter changes form but not chemical identity
- 2. when substances interact with each other
- 7. the substances are formed as a result of reaction
- 8. converts stored chemical energy into electrical current
- 11. It is a chemical element represented with the symbol O