Lecture 2 - Lecture 2: Atomic Structure, Molecular Formulae...

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Unformatted text preview: Lecture 2: Atomic Structure, Molecular Formulae 8/27/08 (Nucleus + Electron Shells) -Z +Z Z electrons Atomic Structure A Z e - X A: Atomic Mass Z: Atomic Number Atomic Symbol A = Z + N (Neutrons) © 2008 A. Pines M. K ubinec L2-1 Examples of Isotopes 1 H 1.0 2.0 12 C 13 C 14 C 14 N 15 N 12.0 13.0 14.0 14.0 15.0 16 O 17 O 18 O 235 U 238 U 16.0 17.0 18.0 235.0 238.0 L2-2 2H 3 3 H 3.0 He 3.0 4.0 4 He © 2008 A. Pines M. K ubinec Mass Spectrometer Ionization - N Magnet Mass Spectrum Sample Acceleration S 1H 1H 2, 2H 1H2H 3He , 12C 16 O 13C 16O 1H 16O 18O 2 , 2 12C16O 2 16O18O 13C16O 2 0 10 20 30 18O 2 40 50 L2-3 © 2008 A. Pines M. K ubinec © 2008 A.Pines M. Kubinec 1 Lecture 2: Atomic Structure, Molecular Formulae 8/27/08 ChemQuiz© 2.1 © 2008 A. Pines M. K ubinec L2-4 ChemQuiz© 2.2 © 2008 A. Pines M. K ubinec L2-5 Empirical and Molecular Formula Methane Ethylene CH4 CH2 CH4 C 2H8 C3H12 C H 2 C 2 H 4 C 3H 6 CH C 2 H 2 C 3H 3 L2-6 Acetylene CH © 2008 A. Pines M. K ubinec © 2008 A.Pines M. Kubinec 2 Lecture 2: Atomic Structure, Molecular Formulae 8/27/08 ChemQuiz© 2.3 © 2008 A. Pines M. K ubinec L2-7 ChemQuiz© 2.4 © 2008 A. Pines M. K ubinec L2-8 Electron Transfer, Redox Copper is less “noble” than Silver Cu (s)/Cu2+ (aq) Ag e- (s)/ Ag+ (aq) Cu (s) + 2 Ag+ (aq) Cu2+ (aq) + 2 Ag (s) If metallic Copper is inserted into a AgNO3 solution, Cu2+ and metallic Ag should form © 2008 A. Pines M. K ubinec L2-9 © 2008 A.Pines M. Kubinec 3 ...
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This note was uploaded on 10/19/2009 for the course CHEM 4a taught by Professor Gordon during the Spring '06 term at University of California, Berkeley.

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Lecture 2 - Lecture 2: Atomic Structure, Molecular Formulae...

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