http://www.bbc.co.uk/schools/gcsebitesize/science/add_ocr_gateway/periodic_table/atomstrucrev1.shtml
http://chemwiki.ucdavis.edu/Theoretical_Chemistry/Chemical_Bonding/General_Principles_of_Chemical_Bonding/Ionic_Bonds
http://www.bbc.co.uk/schools/gcsebitesize/science/add_gateway_pre_2011/periodictable/ionicbondingrev1.shtml
http://www.bbc.co.uk/schools/gcsebitesize/science/add_aqa_pre_2011/atomic/ionicrev1.shtml
QUESTIONS
1. USE THE STRUCTURE TO EXPLAIN.
a. How graphite conducts electricity.
b. Why diamond is considered as the hardest substance?
http://www.bbc.co.uk/schools/gcsebitesize/science/add_edexcel/covalent_compounds/compoundsrev1.shtml
http://www.bbc.co.uk/schools/gcsebitesize/science/add_ocr_gateway/chemical_economics/nanochemistryrev1.shtml
http://www.bbc.co.uk/schools/gcsebitesize/science/add_ocr_gateway/periodic_table/metalsrev2.shtml
http://www.chemguide.co.uk/atoms/bonding/metallic.html
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