CH 301 Chapter 2 notes part2

CH 301 Chapter 2 notes part2 - CH 301 Chapter 2 part 2...

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CH 301 Chapter 2 part 2: ‘IONIC’ and ‘COVALENT’: opposite ends of a scale! All IONIC bonding has some covalent character All COVALENT bonding has some ionic character. ELECTRONEGATIVITY Tendency of an atom to attract electrons to itself when chemically combined with another atom . MOST electronegative element is FLUORINE SECOND most electronegative element is OXYGEN (Pauling scale) Arrange these elements based on their electronegativity: Se, Ge, Br, As Be, Mg, Ca, Ba Bond Type and Electronegativity Consider atom X and atom Y with a shared pair of electrons (a single bond) between them: Depending on the electronegativites of X and Y there are three possibilities: X and Y have identical electronegativities. (e.g., X and Y are the same element). Electrons are equally shared. This is an IDEAL (nonpolar) COVALENT bond. X and Y have dissimilar electronegativities. (e.g., Y is more electronegative) Y has greater control of the electrons. Y is slightly negative; X is slightly positive
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CH 301 Chapter 2 notes part2 - CH 301 Chapter 2 part 2...

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