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Valency G8

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A set of slides created to teach Valency G8 to learners at Bishops Diocesan College in Cape Town.

A set of slides created to teach Valency G8 to learners at Bishops Diocesan College in Cape Town.

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  • 1. VALENCY K Warne
  • 2. SAMPLE ONLY SAMPLE ONLY SAMPLE ONLY For FULL presentation click HERE >> ScienceCafe Bonding & Valency  Atoms are able to ……………….(stick) together.  They do this by means of their ……………………...  The number of electrons an atom can bond with is called its ……………………..  This number tells you how many bonds the atom can make. O Oxygen atoms make two bonds Hydrogen atoms make one bond O One oxygen atom bonds to ……… hydrogen atoms +  x HH • Two hydrogen atoms with their electrons x HH • Both atoms attracting both electrons – bonded together Valency … Valency ...
  • 3. SAMPLE ONLY SAMPLE ONLY SAMPLE ONLY For FULL presentation click HERE >> ScienceCafe Metals: Valency/Bonds Non-metals Valency/Bonds Sodium +1 GI Fluoride -1 GVII Potassium +1 GI Chloride -1 GVII Lithium +1 GI Bromide -1 GVII Silver +1 Iodide -1 GVII (Hydrogen) +1 Sulphide -2 GVI Copper (I) +1 Oxide -2 GVI Copper (II) +2 Calcium +2 GII Nitride -3 GV Magnesium +2 GII Zinc +2 Lead +2 VALENCY = GRP NO - 8 Mercury +2 Iron (II) +2 Iron (III) +3 Aluminium +3 GIII VALENCY = GRP NO. Tin +4 This table must be learned off by heart!!
  • 4. SAMPLE ONLY SAMPLE ONLY SAMPLE ONLY For FULL presentation click HERE >> ScienceCafe The Periodic TableGroup Numbers 1 2 3 4 5 6 7 8 VALENCY – (BONDS) … … … … … … … …
  • 5. Bonding - Molecules O O WATER 2H2O C ………….. CH4 O C O ………………………. CO2 SAMPLE ONLY SAMPLE ONLY SAMPLE ONLY For FULL presentation click HERE >> ScienceCafe
  • 6. Bonding Element 1 & Valency Element 2 & Valency Element 1 - bonds Element 2 - bonds Compound Formulae Na +1 Cl -1 Na — Cl— Na — Cl NaCl H O Na S Ca O H C Li O Si O C O SAMPLE ONLY SAMPLE ONLY SAMPLE ONLY For FULL presentation click HERE >> ScienceCafe
  • 7. Hi - This is a SAMPLE presentation only. My FULL presentations, which contain loads more slides (with all the gaps filled in) as well as other resources, are freely available on my resource sharing website: www.sciencecafe.org.za (paste into your browser if link above does not work) Have a look and enjoy! Keith Warne

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