7C3 Revision Crossword Puzzle

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Across
  1. 3. Substances with a pH exactly 7.
  2. 4. Adding oxygen to a substance.
  3. 5. The elements or compounds produced by a chemical reaction.
  4. 6. A reversible change.
  5. 7. The force that holds two atoms together.
  6. 9. A chemical substance that is present at the start of a chemical reaction.
  7. 11. A substance with a pH under 7.
  8. 13. Magnesium oxide + nitric acid.
  9. 15. A way of writing out what happens in a chemical reaction.
Down
  1. 1. Using heat to break a compound down.
  2. 2. An irreversible change.
  3. 3. The reaction of acids and alkalis.
  4. 8. Measures how acidic or alkaline a substance is.
  5. 10. The smallest living part of an element.
  6. 12. What forms when acids react with bases.
  7. 14. A substance with a pH over 7.