chemistry cross word

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Across
  1. 2. a reaction that release heat
  2. 3. loss of electrons
  3. 6. a substance with a ph less than 7
  4. 7. a substance that can dissolve in water
  5. 10. Substance that cannot dissolve in water
  6. 11. the smallest atom of a element
  7. 13. negatively charged particle
Down
  1. 1. separate minutes form solubility
  2. 4. separating liquids with boiling points
  3. 5. the centre of atom containing protons and neutrons
  4. 8. a reaction that absorbs heat
  5. 9. gain of electrons
  6. 12. Separating a solid form a liquid to filter paper