SA Chemistry Revision

123456789101112131415161718192021222324252627
Across
  1. 2. This property of metal means it can be moulded into different shapes
  2. 4. In a flame test Lithium turns the flame what colour?
  3. 6. An alkane with 2 carbons
  4. 8. Atomic ..... is the number of protons and neutrons added together, it is the larger number by the symbol in the periodic table
  5. 9. Sodium .......... an example of a strong alkali
  6. 11. This element is in group 1, period 3
  7. 12. Arch, whorl, composite and ..... are patterns found in fingerprints
  8. 13. Thermochromatic materials change colour in response to changes in what?
  9. 14. The name of group 7 in the periodic table
  10. 17. The charge of a proton
  11. 23. Red ......... a vegetable that can be used to make an indicator to test acids and alkalis
  12. 24. The longest chain fraction extracted from crude oil, used to tarmac road surfaces.
  13. 26. A hazard symbol with an exclamation mark
  14. 27. To test for carbon dioxide you use this, it will turn from colourless to cloudy white
Down
  1. 1. In a flame test this metal turns the flame brick red
  2. 3. Colour of universal indicator in a neutral (pH 7)solution
  3. 5. A reaction between an acid and a base that forms salt and water
  4. 7. To test for this gas you use a lit splint and it will burn with a squeaky pop
  5. 9. Extracted from crude oil, these compounds contain hydrogen and carbon only.
  6. 10. Nanoparticles are used in what product? Hint you use it on holiday.
  7. 15. A type of reaction where temperature rises
  8. 16. This type of bonding is always between a metal and a non metal
  9. 18. A powder used to dust finger prints on a white surface is called ....... black.
  10. 19. In a flame test what colour does potassium turn the flame?
  11. 20. This metal is top of the reactivity series in our specification (the one you need to learn the order of!)
  12. 21. This element contains 6 protons, 6 neutrons and 6 electrons
  13. 22. The colour blue litmus paper turns in acid
  14. 25. A pH ........ is more accurate to indicator paper as it gives a numerical value of pH to 2 decimal places