National 5 revision

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Across
  1. 2. Homologous series with the same general formula as cycloalkanes
  2. 3. The most penetrating radiation
  3. 6. Element with the electron arrangement 2,8,8,1
  4. 7. Number of electrons gained by oxygen to make an oxide ions
  5. 9. Particle with a mass of one and no charge found in the nuclei of atoms
  6. 12. Lightest halogen
  7. 15. Atoms of the same element with different mass numbers
  8. 16. A solid formed from aqueous ions
  9. 20. A charged particle formed when electrons are lost or gained
  10. 21. Addition of hydrogen across a double bond
  11. 24. A solution with an equal concentration of hydrogen and hydroxide ions
  12. 26. Made from ammonia and used to improve plant growth
  13. 27. Alkane with seven carbon atoms in a chain
  14. 28. Type of bond formed between oppositely charged particles
  15. 31. The gain of electrons
  16. 35. Made in the Haber process
  17. 36. Acid in vinegar
  18. 38. A use of alcohols
  19. 39. A soluble base that produces hydroxide ions when dissolved in water
  20. 41. This type of polymerisation produces only the polymer and no other product
  21. 42. This particle is a single electron and is emitted by some radioisotopes
  22. 43. A compound without any double bonds
  23. 44. Number of pairs of electrons shared in a triple bond
  24. 45. Monomer used to make polythene
  25. 46. Name of the functional group in carboxylic acids
  26. 48. Heaviest Noble Gas
  27. 49. This number tells us the total number of neutrons and protons in an atom
  28. 51. Colour of barium sulphate precipitate
  29. 52. Charge on a non-metal ion
  30. 54. These ions form a white precipitate with silver nitrate
  31. 56. Essential nutrient for plants found in ammonium sulphate
  32. 59. Ions that do not take part in a chemical reaction
  33. 60. Name of the Group 7 elements
  34. 61. Acid made in the Ostwald process
  35. 62. Large molecule formed by many monomers joining together
  36. 64. Bonding where a sea of electrons surrounds positive ions
  37. 65. Metal ion that gains three electrons to become an atom
  38. 66. A particle consisting of two protons and two neutrons emitted by some radioisotopes
  39. 69. A chemical bond where electrons are shared
  40. 70. Covalent network substance made from carbon atoms
  41. 71. A reaction where heat energy is released
  42. 72. A substance that changes colour in acid and/or alkali
  43. 73. This series can be used to predict the voltage in a cell
  44. 74. Reducing agent used to extract iron from its ore
  45. 75. Pipette used to measure accurate volumes of solutions
Down
  1. 1. Curve formed by liquids in a narrow tube
  2. 4. Homologous series that starts with methanol
  3. 5. A form of carbon that will conduct electricity
  4. 8. On a graph showing the rate of a reaction, the reaction is fastest when the curve is ______
  5. 10. Positively charged particle found in the nucleus of atoms
  6. 11. There are more of these ions than hydrogen ions in an alkali
  7. 13. This type of substance has covalent bonds and a high melting point
  8. 14. Compounds with the same molecular formula and a different structural formula
  9. 17. These ions will produce carbon dioxide when reacted with an acid
  10. 18. Technique for determining the concentration of a solution using a solution with known concentration
  11. 19. Charge on a metal ion
  12. 22. Method used to extract the ore reactive metals from their ores
  13. 23. Number of moles of hydrogen molecules that will react with one mole of ethane
  14. 25. The reaction of an acid with a base
  15. 29. The shape of a methane molecule
  16. 30. Reaction where electrons are lost
  17. 32. Salts produced from nitric acid
  18. 33. A method to separate a precipitate from a solution
  19. 34. Polyatomic ion with a charge of +3
  20. 37. Gives a lilac flame colour
  21. 40. Negatively charged particle in an atom
  22. 41. Homologous series of hydrocarbons with only single bonds
  23. 47. Element used to test for alkenes
  24. 50. A substance containing more hydrogen ions than hydroxide ions
  25. 53. Shape of an ammonia molecule
  26. 55. A series of compounds with the same general formula, similar chemical properties and a trend in physical properties
  27. 57. This number tells us the number of protons in an atom
  28. 58. Number of atoms in a nitrate ion
  29. 63. A reaction where heat energy is taken in from the surroundings
  30. 64. A group of atoms help together by covalent bonds
  31. 67. Name of the functional group in alcohols
  32. 68. This type of acid includes ethanoic, citric and butanoic
  33. 72. Catalyst in Haber process