Chemistry Crossword Puzzle

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Across
  1. 2. A substance containing two or more types of atoms chemically combined.
  2. 4. The change in state from solid to liquid
  3. 7. A solid formed when two solutions are mixed.
  4. 9. The mass of a substance divided by its volume
  5. 13. The flow of electric current through a substance. Conduction is due to moving electrons in metals and moving ions in ionic solutions/melts. (two words)
  6. 15. The solid obtained on the filter paper when carrying out filtration.
  7. 16. Neither acidic nor alkaline. A solution that has pH 7.
  8. 19. Burning(usually in a reaction with oxygen gas)
  9. 20. Can be pulled out into wires
Down
  1. 1. A soluble base. An alkaline solution which has a pH above 7.
  2. 3. A method of separating a liquid from a mixture by boiling the mixture then condensing the vapours.
  3. 5. A negatively charged particle found in electron shells outside the nucleus.
  4. 6. A positively charged particle in the nucleus of an atom. Also used as a term for a hydrogen ion
  5. 8. An atom or group of atoms that has become positively charged or negatively charged.
  6. 10. A substance containing only one type of atom
  7. 11. The liquid that truns through the filter paper when carrying out filtration
  8. 12. Two or more substance mixed together but not chemically combined.
  9. 14. The change of a gas to a liquid.
  10. 17. A mixture of two ore more metals or (less often) a metal with a non-metal.
  11. 18. A particle made up of two ore more atoms held together by covalent bonds