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Across
  1. 4. a scale used to measure acidity
  2. 5. substance made up of two or more elements
  3. 7. the new substances formed after a chemical reaction
  4. 9. a solution with a small amount of solute and a large amount of solute
  5. 10. two or more atoms joined together as a unit
  6. 12. a process or reaction which takes in energy
  7. 13. a positively charged ion
  8. 15. a shorthand way of representing a chemical reaction
  9. 17. reaction between an acid and a base
  10. 19. a compound formed in a neutralisation reaction
  11. 21. corrosive substance with a low pH
  12. 22. a substance which is dissolved in a solution
  13. 23. letter or letters that represent and element
  14. 25. an atom or group of atoms that has lost or gained electrons
Down
  1. 1. symbols which represent a compound
  2. 2. a process or reaction which gives out energy
  3. 3. a solution formed when a solute dissolves in water
  4. 4. an insoluble substance formed from the combination of two solutions
  5. 6. a substance made up of one type of atom
  6. 8. a solution with a large amount of solute in a solvent
  7. 11. a negatively charged ion
  8. 14. the substances combined in a chemical reaction
  9. 16. can burn or eat away a material
  10. 18. a substance which has a solute dissolved in it
  11. 20. base that can dissolve in water
  12. 24. substance with a high pH