1. CHEMICAL BONDING Dr Sharipah Ruzaina Syed Aris srsa_July2009

4. srsa_July2009

6. Electron configurations Li 1s 2 2s 1 Orbital diagrams Lewis electron-dot symbols + F 1s 2 2s 2 2p 5 Li + 1s 2 Three ways to represent the formation of Li + and F - through electron transfer. srsa_July2009 + F - 1s 2 2s 2 2p 6 Li 1s 2s 2p F 1s 2s 2p + Li + 1s 2s 2p F - 1s 2s 2p + . + F : : : Li . Li + + F - : : : :

8. Exercise: aluminium fluoride AlF 3 magnesium chloride MgCl 2 srsa_July2009 [ O ] 2– [Mg] 2+ O Mg

14. 2 carbon and hydrogen atoms each Acetylene (C 2 H 2 ) srsa_July2009

17. Covalent bonds of network covalent solids. srsa_July2009

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21. Using lines to represent the bonds, this could be drawn more simply as: srsa_July2009