CH1012
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LECTURE 2
LAST LECTURE
• What is involved in the course
• Inorganic chemistry : main group, Tmetal
• Periodic table – different groups
• Materials: elements, compounds,
• Phases: gas, liquid, solid
• Ionic solids: metal+non-metal, electrostatic
   attraction, NaCl , 3D-lattice of ions
• Molecules: discrete chemical units
• Covalent bonding : non-metal + non-metal,
   sharing e- pair, increased e- r, distance fixed
• Chemical equilibrium : K;  Le Chatelier’s  
    Principle: net rxn opposes change.