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  • Created by: Jasmin
  • Created on: 23-01-14 08:24
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  • Electronegativity
    • Increases across a period and decreases down a group
    • Tetrahedral olecules of for AB4 are not polar
    • NH3 3 bond pairs, 1 lone pair polarities do not cancel, so the molecule is polar
    • Trigonal planar are not polar because bond polarities cancel out
    • Linear molecules non polar since dipoles cancel out
    • Simple test to find whether a liquid consists of polar molecules is to:
      • Run a stream of water from a burette near a charged rod
        • If the water is attracted towards the rod, the liquid contains polar molecules


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