Week 06 - GeneralChemistry CHEM151 Week 6 UA GenChem...

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UA GenChem General Chemistry General Chemistry CHEM 151 CHEM 151 Week 6
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UA GenChem Photoelectron Spectroscopy Another spectroscopic technique can be used to determine number of electrons with a determined energy in an atom. KE h ν Ionization Energy = h ν - KE The n th Ionization Energy is the energy needed to remove the n th electron from an atom.
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UA GenChem First ionization energy removes electron from outermost shell. PES measures the energy to remove one electron from any shell of a neutral atom. Energy of entering photon (h ν ) is larger than ionization energy (Ie), so the electron leaves the atom with excess kinetic energy (KE), which PES measures. h ν = IE + KE known (scanned) measured determined h ν n = KE IE Photoelecton Spectroscopy (PES)
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UA GenChem 1.31 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) H
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UA GenChem 2.37 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) He
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UA GenChem 6.26 0.52 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) Li
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UA GenChem 11.5 0.90 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) Be
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UA GenChem 19.3 1.36 0.80 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) B
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UA GenChem Participation cont. Draw the photoelectron spectra of B 2+
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UA GenChem 28.6 1.72 1.09 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) C
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UA GenChem 39.6 2.45 1.40 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) N
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UA GenChem 52.6 3.12 1.31 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) O
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UA GenChem 67.2 3.88 1.68 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) F
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UA GenChem 84.0 4.68 2.08 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) Ne
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UA GenChem 104 6.84 3.67 0.50 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) Na
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UA GenChem 151 12.1 7.79 1.09 0.58 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) Al .      Mg
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UA GenChem 151 12.1 7.79 1.09 0.58 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) Al
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UA GenChem 178 15.1 10.3 1.46 0.79 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) Si
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UA GenChem 208 18.7 13.5 1.95 1.01 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) P
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UA GenChem 239 22.7 16.5 2.05 1.00 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) S
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UA GenChem 273 26.8 20.2 2.44 1.25 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) Cl
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UA GenChem 309 31.5 24.1 2.82 1.52 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) Ar
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UA GenChem 347 37.1 29.1 3.93 2.38 0.42 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) K
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UA GenChem 390 42.7 34.0 4.65 2.90 0.59 0 2 4 6 8 10 12 14 16 Number of Electrons Energy (MJ/mol) Ca
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UA GenChem Modified Shell Model Modified Shell Model The trends in the results from photoelectron
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This note was uploaded on 02/03/2011 for the course CHEM 151 taught by Professor Staff during the Fall '08 term at University of Arizona- Tucson.

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Week 06 - GeneralChemistry CHEM151 Week 6 UA GenChem...

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