Ch3.5-4.2 - Electronegativity Attraction of an atom for an...

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Lo EN = vacancies are far from nucleus Hi EN = vacancies are close to nucleus Section 3.5 E + + + + + + + Which vacancies are more attractive to an electron: green or pink? Because it’s as close to the nucleus as an e- can get, at 2 e’s per orbital. Electronegativity Attraction of an atom for an “incoming e - A + e - A -
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Electronegativity Attraction of an atom for an “incoming e - A + e - A - E 2 s 2 p B N O F Ne C Be Li Which element in the 2nd period has the highest EN? Section 3.5
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Valence Orbital Energies and Electronegativit E Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Ga Ge As Se Br Kr H + + + + + + + + + + + + + + Furthest vacancy Lo EN Closest vacancy Hi EN Summary
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Electronegativity
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Electronegativity Trends EN: ability of an atom in a molecule to attract bonding electrons. Hi EN Lo EN Metals Non- metals Exclude Noble Gases F O N Cl Section 3.5
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O, Si, Br, Na, Cs, Ne Pick the largest atom: Pick the smallest atom: Pick the atom with the highest ionization energy: Pick the atom with the lowest ionization energy: Pick the most electro- negative atom: Pick the least electro- negative atom:
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E A B Given are the highest energy occupied orbitals of elements A and B .
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