Chemistry

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