Across
- 3. lather with soap
- 4. returning to original shape
- 5. small molecules
- 8. removal of hardness
- 9. passage of electric current through it
- 10. ability to neutralize acid
Down
- 1. liquid form
- 2. heating and become hard on cooling
- 6. transform of chemical energy into electrical energy
- 7. adding chlorine to water