Across
- 3. Plastics are made of large molecules called
- 9. Polymer chains with a few cross linking units that can trap water
- 10. Positively charged sub atomic particle
- 11. Carbon dioxide in the atmosphere causes this
- 15. A list of elements in order of their reactivity
- 17. When lithium burns in air the lithium reacts with oxygen. What product is formed
- 18. Another name for calcium hydroxide solution
- 20. Fuels made from plant or animal products
- 22. Fuel made from oils extracted from plants
- 27. Metal ions are attracted to this electrode in electrolysis
- 28. Steel is an alloy of which element
- 31. When aggregate is added to water, cement and sand, this material is formed
- 33. Crude oil is separated t using this method
- 34. The temperature at which liquid boils or the gas condenses
- 36. Hydrocarbon containing a double bond
- 40. Formed when nitrogen and oxygen react together
- 41. Magnesium carbonate decomposes to form carbon dioxide and which other substance
- 42. An insoluble solid formed by the reaction of two solutions
- 43. Ethanol is made by hydration of this substance
- 44. Used in foods to stop oil and water separating into layers
- 46. How many electrons does magnesium have on its outer electron shell
- 47. Fuel made from oils extracted from plants
- 49. Limestone is mainly made of this
- 54. Crude oil can be separated into different substances with similar boiling points. These are known as ……….
- 55. Mild steel contains a small amount of which element
- 57. A metal which is mixed with other elements is called an
- 59. Bonding which involves the sharing of electrons
- 60. Many monomers join together in this process
- 61. Alkane with three carbon atoms
- 62. To make lots of calcium oxide, a reaction is carried out in this furnace
- 63. The process of breaking down large hydrocarbon molecules
- 64. Drink bottles are made using this plastic
- 65. These orbit the nucleus
- 66. Used for aircraft fuel
- 67. A rock that contains a metal worth extracting
- 68. Metals that are more reactive than carbon are extracted using this method
Down
- 1. A substance that is made of only one type of atom
- 2. Emulsifiers contain a hydrophobic tail which is attracted to oil. What is the other end of emulsifier called
- 4. The breaking down of a substance using heat
- 5. Pure iron is not useful because it is too …..
- 6. Metal oxides react with carbon to form carbon dioxide and which other product
- 7. Bonding which involves the transfer of electrons
- 8. The simplest steel
- 10. Method of using plants to help extract copper
- 12. Iron is extracted from iron oxide by using carbon to remove oxygen. What is the name of the machinery used to extract it
- 13. This substance is used by farmers to improve soil that is acidic
- 14. A compound made of hydrogen and carbon only
- 16. Sulfur dioxide causes this
- 19. In power stations, sulphur dioxide is removed from the flue gases by reacting it with this substance
- 21. Fitted to car engines to reduce carbon monoxide and nitrogen oxides produced in a car engine
- 23. Removal of oxygen
- 24. Some metals can be found in their native state. This is because they are
- 25. Number of protons and neutrons in an atom
- 26. Method of using bacteria to help extract copper
- 29. Process of when a metal can be extracted from a compound by reacting with an element higher up in the reactivity series.
- 30. Calcium carbonate reacts with hydrochloric acid to give water, carbon dioxide and which other product
- 32. This gas is a reactant needed for combustion
- 35. Solid particles containing carbon and unburnt hydrocarbons
- 37. Process used to extract copper by heating
- 38. Number of protons in the nucleus of an atom
- 39. Maximum number of electrons in the second electron shell
- 45. Added to engines to remove particulates
- 48. Number of neutrons can be different even for the same element. These are called
- 49. This gas is a product of combustion
- 50. This gas is a product of incomplete combustion
- 51. Copper ore containing copper(I) sulfide
- 52. This substance is used to test for an unsaturated hydrocarbon
- 53. Copper ore containing copper carbonate
- 56. The tendency to turn into a gas
- 58. A substance made from one or more types of atoms chemically bonded together
- 59. Iron from a blast furnace that is poured into moulds and left to solidify
- 61. Used for fuel in car engines
- 63. Powdered limestone can be heated with powdered clay to make this