Teachers' guide 2 - National STEM Centre

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296 Appendix J Other film loops are available which have been found useful in the teaching of this course. They are mentioned under the appropriate topics and can be obtained from a film loop distributor such as Sound-Services Limited, Kingston Road, London SW19. Display Boards Teachers will find it useful when teaching this course to have available an energy level display board and a chemical specimens display board. The energy level display board has its most important use in Topic 4 when electronic energy levels are first discussed. As well as being an effective method of displaying energy levels and the arrangement of electrons within those levels the board is also useful because an important concept is introduced by means of an interesting demonstration and thereby rendered more memorable for many students. The display board (figures M.5 and M.6) is readily constructed from plywood with wooden shelves to represent the energy levels. Beads of 2 cm diameter are used to represent electrons and are fitted over headless nails on the energy levels as required. A box fitted behind the board can be used to store a supply of beads. Figure M.5 An energy level display board.
Models and other visual aids Figure M.6 Suitable dimensions for an energy level display board. The chemical specimens display boardis particularly useful when used to support the study of inorganic substances in relationship to the Periodic Table. For example during the study of Topic 2 the display board should be continuously present and carry (as far as possible) specimens of the chlorides and oxides of the second and third short period elements. The visible presence of the compounds is an effective reminder to the students of the change in properties that occurs across a period. Similarly in Topic 5 samples of the halogens and their compounds can be added to the board as they are investigated but when concluding the topic the specimens should be re-arranged to illustrate the oxidation numbers of the halogens in their compounds. Another good time to use the display board is during Topic 16 when d-block elements can be displayed in their different .oxidation numbers: here, as elsewhere, students can be encouraged to build up the display using their own laboratory material. The 297
Page 1 and 2: Appendix 1 Nomenclature, units, and
Page 3: Nomenclature, units, and abbreviati
Page 6 and 7: 262 Appendix 2 Rubber caps for 100
Page 8 and 9: 264 Appendix 2 Adjustment will be r
Page 10 and 11: 266 Appendix 2 Construction The ins
Page 12 and 13: 268 Appendix 2 FigurcA.7 Box and li
Page 14 and 15: 270 Appendix 2 The box is then furt
Page 16 and 17: 272 Appendix 2 polaroid cork protra
Page 18 and 19: 274 Appendix 2 light, so the instru
Page 20 and 21: 276 Appendix 2 Before these curves
Page 22 and 23: 278 Appendix 2 These can be conveni
Page 24 and 25: 280 Appendix 2 The components requi
Page 26 and 27: 282 Appendix 2 screw clip Figure A.
Page 28 and 29: 284 Appendix 2 solutions required f
Page 30 and 31: 286 Appendix 2
Page 32 and 33: 288 Appendix 3 For this course a nu
Page 34 and 35: 290 Appendix 3 By the use of rubber
Page 36 and 37: 292 Appendix 3 For further informat
Page 38 and 39: 294 Appendix 3 Transparencies have
Page 42 and 43: 298 Appendix 3 display board (figur
Page 45 and 46: Appendhc4 Safety A correct attitude
Page 47 and 48: Safety c Storage of chemicals i Onl
Page 49 and 50: Safety Cuts - Staunch the bleeding
Page 51 and 52: Name benzoyl chloride bromine bromo
Page 53 and 54: Name 2-naphthol nitric acid nitro b
Page 55 and 56: Appendix 5 Examinations and tests T
Page 57 and 58: Examinations and tests In many resp
Page 59 and 60: Examinations and tests available to
Page 61 and 62: Examinations and tests The form of
Page 63 and 64: Examinations and tests in order to
Page 65 and 66: Examinations and tests Information
Page 67 and 68: Examinations and tests Example A Re
Page 69: Examinations and tests Example B An
Page 72 and 73: 328 Appendix 6 most effective way o
Page 74 and 75: 330 Appendix 6 Programme writers ar
Page 76 and 77: 332 Appendix 6 5 Remedial programme
Page 78 and 79: 334 Appendix 6 non-experimental pro
Page 80 and 81: 336 Appendix 6 It is generally agre
Page 82 and 83: 338 Reference sources and bibliogra
Page 84 and 85: 340 References sources and bibliogr
Page 86 and 87: 342 Reference sources and bibliogra
Page 89 and 90: Index References to specific salts
Page 91 and 92:
Index endothermic reactions, equili
Page 93 and 94:
Index paper chromatography, 218, 21
Page 95 and 96:
Acknowledgements The Nuffield Found
Page 97 and 98:
Acknowledgements Chemistry teachers
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Teachers' guide 2 - National STEM Centre

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