LIST OF CHEMISTRY LABELLED DIAGRAMS REQUIRED FOR SCHOOL CERTIFICATE

Pupils are expected to draw and label these repeatedly, until they can memorise them:

  1. Arrangement and movement of the particles in the solid, liquid and gaseous states.
  2. The atom of a named element showing the number of protons and neutrons in its nucleus, as well as its electronic configuration.
  3. The formation of an ionic compound by transfer of electrons taking as examples NaCl and MgCl2. A key should be given to differentiate between the electrons for the different elements forming the compound.
  4. The formation of a covalent bond by sharing of electrons for H2, Cl2, O2, HCl, N2, H2O, CH4, C2H4 and CO2. A key should be given to differentiate between the valency electrons for the different elements forming the compound.
  5. Methane and iodine as simple molecular substances.
  6. Sand (silicon dioxide), diamond and graphite as giant molecular substances.
  7. Energy profile diagram for an exothermic reaction.
  8. Energy profile diagram for an endothermic reaction.
  9. Arrangement of ions in a metal showing the metallic bond and the effect of an alloying element on the metal lattice.
  10. First four alkanes and their branched isomers.
  11. First four alkenes and their branched isomers.
  12. First four alcohols and their branched isomers.
  13. First four carboxylic acids and their branched isomers.
  14. The formation, structure and repeating unit of poly(ethene).
  15. The simplified structure and repeating unit of nylon.
  16. The simplified structure and repeating unit of Terylene.
  17. The simplified structure, repeating unit and monomers of proteins.
  18. The simplified structure of a fat.
  19. The structure, repeating unit and monomers of carbohydrates.