States of matter

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Across
  1. 2. a subatomic particle that has no charge
  2. 6. the name of the group 1 metals
  3. 8. 2 or more different elements chemically bonded
  4. 10. a gas that turns limewater cloudy
  5. 12. the location of protons and neutrons
  6. 13. the salt made with Sulphuric acid
  7. 14. a metal with the symbol Na
  8. 17. a pure substance made of only 1 type of atom
  9. 19. elements that are dull and brittle
  10. 20. the salt made with hydrochloric acid
Down
  1. 1. this type of metal reacts with an acid and produces carbon dioxide
  2. 3. what non metal produces a sulphide compound in a reaction
  3. 4. the acid needed to make a nitrate salt
  4. 5. the name of the group 7 non metals
  5. 7. what non metal produces an iodide in a reaction
  6. 9. a positively charged subatomic particle
  7. 11. the charge on an electron
  8. 15. the element with a symbol 'K'
  9. 16. a gas that makes a squeaky pop
  10. 18. elements that are shiny, sonorous, a good conductors