Y9 Keywords

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Across
  1. 5. A toxic gas produced during incomplete combustion
  2. 8. A substance made from two or more types of atom
  3. 10. A mixture of metals
  4. 15. Came up with the theory of atoms as solid spheres
  5. 17. Gas that makes up 78% of the atmosphere
  6. 19. The name given to the list of metals used to work out how to extract them
  7. 21. The method used to remove salt from seawater to make it drinkable
  8. 23. Small solid pieces of carbon produced in combustion
  9. 26. A column on the periodic table
  10. 27. Discovered the nucleus and later the proton
  11. 30. A row on the periodic table
  12. 31. Gas that makes up 21% of the atmosphere
  13. 32. The method used to separate and identify soluble substances
  14. 35. Word meaning unreactive, used to describe Group 0
  15. 37. A rock containing enough metal compound to be economically viable to extract
  16. 39. Found in the centre of the atom, containing protons and neutrons
  17. 41. A substance that can be beaten or bent into shapes
  18. 42. The type of gas produced when nitrogen and oxygen in the air react at high temperatures
  19. 44. The name given to the number on the periodic table that tells you the number of protons and neutrons
Down
  1. 1. A natural process that removes carbon dioxide from the atmosphere
  2. 2. Came up with the idea of electron shells
  3. 3. Gas that makes up rough 0.9% of the atmosphere
  4. 4. Where electrons are found in the atom
  5. 5. A greenhouse gas produced during complete combustion
  6. 6. The scientific word for burning
  7. 7. The gas produced when sulfur impurities react with oxygen during combustion
  8. 9. The name given to group 0 elements
  9. 11. The name given to the liquid in chromatography
  10. 12. The small particles that make up everything
  11. 13. Metals are good ___________ conductors
  12. 14. Name given to coal, oil and gas
  13. 16. The subatomic particle with a mass of 0 and a charge of -
  14. 18. The method used to remove insoluble solids from a liquid
  15. 20. A substance that makes a ringing sound when struck
  16. 22. Caused by nitrogen oxides and sulfur dioxides
  17. 24. Discovered the electron and made the plum pudding model
  18. 25. The subatomic particle with a mass of 1 and a charge of +
  19. 28. The subatomic particle with a mass of 1 and a charge of 0
  20. 29. The method used to disinfect water to make it potable
  21. 33. Metals have ______ melting points
  22. 34. Two or more substances that can be physically separated
  23. 36. A greenhouse gas released by cattle and rice farming
  24. 38. The name given to the number on the periodic table that tells you the number of protons
  25. 40. Discovered the neutron
  26. 43. A substance made of one type of atom