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eng-spring07-q210s

eng-spring07-q210s - CHEM 151 Quiz 10 NAME_KEY ID Show your...

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CHEM 151: Quiz 10 NAME _______ KEY ____________ ID #_______________ Show your work for full credit Eng Q210 You are allowed to use books/notes/etc, but you Due by the START of Thursday’s (4/26/07) lecture. are not allowed to receive or give help from others. Late quizzes will receive at least a 10 point deduction. 1. (2 pts) Linus Pauling defined electronegativity, χ , as the “power of an atom in a molecule to attract electrons to itself.” Despite this simple definition there have been many different methods developed for quantifying electronegativity. The Pauling electronegativity scale uses bond dissociation energies to quantify electronegativity (after assigning 4.0 as fluorine’s value). In contrast, the Mulliken electronegativity scale is the average of the ionization energy and the electron affinity (actually, the absolute value of electron affinity) of an element. Briefly explain why it is logical to use electron affinity and ionization energy to calculate electronegativities of the elements.
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