CH9(5-6)Nov12FA08a

CH9(5-6)Nov12FA08a - Chemistry 109 University of Nebraska...

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Chemistry 109 University of Nebraska FALL 2008 ANNOUNCEMENTS Exam 3 – Thursday 5:45 Check seating !!
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Electronegativity T he ability to attract bonding electrons. (the attraction an atom has for electrons it is sharing with another atom)
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Decreases Increases
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Electronegativity and Bond Polarity The difference in electronegativity between two atoms in a bond can be used to gauge the bond polarity. Compound F 2 HF LiF Electronegativity 4.0 – 4.0 = 0 4.0 – 2.1 = 1.9 4.0 – 1.0 = 3.0 Difference (Δ χ ) Type of bond Pure covalent Polar covalent Ionic
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5 Electronegativity and Bond Polarity If the difference in electronegativity between bonded atoms is __, the bond is ______ covalent If the difference in electronegativity between bonded atoms is ____ to _____, the bond is _________ covalent If the difference in electronegativity between bonded atoms ___ to _____, the bond is ___________ covalent If the difference in electronegativity between bonded atoms larger than or equal to ____, the bond is __________ -
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Using trends in electronegativity, rank each set of three bonds from least polar to most polar :
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CH9(5-6)Nov12FA08a - Chemistry 109 University of Nebraska...

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