Christmas Chemistry Retrieval

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Across
  1. 2. the name for a liquid that a substance dissolves into
  2. 3. the day exactly one week after Christmas day
  3. 6. season in Australia when it is Christmas
  4. 9. scientist with a big beard and known as the 'father' of the modern Periodic Table
  5. 10. most reactive element in group 7
  6. 14. the element found in all acids
  7. 16. Santa's third reindeer
  8. 18. a vegetable served with Christmas dinner that is named after the capital of Belgium
  9. 20. type of solution if the number of days of Christmas were a pH number
  10. 22. Group 0 element and Superman's home planet
  11. 23. an element brought by one of the 'Three Wise Men'
  12. 26. total number of presents given in 12 Days of Christmas Hint: not quite a year in days
  13. 28. sub-atomic particle with a negative charge
  14. 29. a process to separate liquids with different boiling points
  15. 31. sub-atomic particle with a positive charge
Down
  1. 1. metal element which was found in Argentina (Hint: use periodic table symbols that are close to those in Argentina)
  2. 4. reaction when a molecule loses oxygen
  3. 5. a type of calendar usually with twenty-four doors
  4. 7. an early model of the atom which was similar to a Christmas pudding
  5. 8. the only metal element which is a liquid at room temperature - also a planet
  6. 11. in 'OILRIG', what does the 'O' stand for?
  7. 12. gas formed from burning fossil fuels that causes acid rain
  8. 13. a column in the Periodic Table
  9. 15. Scandanavian country that gives a massive Christmas tree to the UK every year as thanks for the help given in Second World War
  10. 17. another name for the elements found in Group O
  11. 19. Santa will get covered by this sooty element when he goes down a chimney
  12. 21. water cooled glass tube which converts gas to liquid in distillation
  13. 24. number of ghosts that visit Scrooge in 'A Christmas Carol'
  14. 25. a row in the Periodic Table
  15. 27. maximum number of electrons that can go in the second or third shell
  16. 30. another name for Father Christmas