Chemistry Crossword Puzzle

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Across
  1. 3. A force of attraction between atoms
  2. 4. A scale used to specify the acidity or alkalinity of a solution
  3. 5. The smallest particle of a substance that can exist independently
  4. 7. The process of a substance changing from a solid to a liquid
  5. 9. A representation of a chemical compound
  6. 11. The smallest unit of an element that retains its chemical properties
  7. 12. The element with the symbol 'Fe' on the periodic table
  8. 14. The symbol for carbon on the periodic table
Down
  1. 1. The type of bond formed by the sharing of electrons
  2. 2. The study of matter and its changes
  3. 6. A substance that speeds up a chemical reaction without being consumed
  4. 8. The process of a substance changing from a liquid to a gas
  5. 10. The type of bond formed by the transfer of electrons
  6. 11. The symbol for gold on the periodic table
  7. 13. A common gas composed of two oxygen atoms