Lecture Notes 9

6 typeset by foiltex electronegativity e n ability of

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Unformatted text preview: .... ............. N· · ; double ; triple bond length: distance between the centers of two atoms joined by a covalent bond l >l >l – Typeset by FoilTEX – polar covalent bond: electron pair is not shared equally between both atoms the electrons are displaced towards the more nonmetallic element – Typeset by FoilT X – E δ+ δ− H Cl GChem I 9.6 – Typeset by FoilTEX – electronegativity E N : ability of an atom to attract electrons in a compound; Pauling scale: most electronegative atom, F, has EN = 4 electronegativity is related to electron affinity and ionization energy if ∆E N = E N1 − E N2 ≈ 0, the bond is covalent if ∆E N ≈ 0.4–2.0, the bond is polar covalent if ∆E N 2.0, the bond is ionic Guidelines for Drawing Lewis Structures Rules 1. Determine the skeleton structure. (a) H is always a terminal atom and has only one bond. (b) In simple compounds, O and X (halogens) are terminal atoms. If X is bonded to O, O is terminal (c) Oxygen atoms do not bond to each other excep...
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This document was uploaded on 03/18/2014 for the course CHEM 1303 at SMU.

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