Chemistry Word puzzle

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Across
  1. 3. A column in the periodic table.
  2. 4. The smallest particle of an element.
  3. 7. Particles with a negative charge.
  4. 9. A substance that speeds up a reaction.
  5. 11. A substance that dissolves in water.
  6. 12. Particles in the nucleus with no charge.
  7. 14. The number of protons in an atom.
  8. 15. A chart of all known elements.
  9. 17. A charged atom.
  10. 18. A mixture that looks the same throughout.
Down
  1. 1. A substance made of only one type of atom.
  2. 2. The substance that does the dissolving in a solution.
  3. 5. A row in the periodic table.
  4. 6. Particles with a positive charge.
  5. 8. The substance being dissolved in a solution.
  6. 9. A change that produces new substances.
  7. 10. A bond where electrons are transferred.
  8. 11. A Process where a solid changes directly into a gas.
  9. 13. A mixture where you can see the different parts.
  10. 16. A bond where electrons are shared.