L10S10+Spin,Pauli+Principle,+Electronic+Configs+02-10-10

L10S10+Spin,Pauli+Principle,+Electronic+Configs+02-10-10 -...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: CHEM 1A L10: "Spin, Pauli Principle, Electronic Configs" Lab 3: Molecules and Light •Goal: Determine how effective a sunscreen is at absorbing radiation by measuring the molar absorptivity (extinction coefficient) of the active ingredients. •Tools and Skills: : UV-Vis absorption UVspectroscopy, Beer's Law, and dilution calculations. © 2006Kubinec, Pines, Nitsche, UCB L10-1 © 2006Kubinec, Pines, Nitsche, UCB L10-2 Electronic Configurations Atom 1s 2s 2p 3s Config. Magnetism H He Li Be B © 2006Kubinec, Pines, Nitsche, UCB 1s1 1s2 1s22s1 1s22s2 1s22s22p1 + 0 + 0 + L10-3 © 2006 Kubinec, Pines, Nitsche, UCB 1 CHEM 1A L10: "Spin, Pauli Principle, Electronic Configs" Atom 1s 2s Electronic Configurations 2p 3s Config. Magnetism C N O F Ne © 2006Kubinec, Pines, Nitsche, UCB 1s22s22p2 1s22s22p3 1s22s22p4 1s22s22p5 1s22s22p6 [Ne]3s1 ++ +++ ++ + 0 + L10-4 Na ChemQuiz© 10.1 When an electron spin flips, flips, for which of the following following is the energy not not altered ? A) N © 2006Kubinec, Pines, Nitsche, UCB 2s 2s 1s 2p B) O C) F L10-5 ChemQuiz© 10.2 Which species can have the electronic configuration [He]2s22p53s1 ? A) F - B) Na C) Na+ L10-7 © 2006Kubinec, Pines, Nitsche, UCB © 2006 Kubinec, Pines, Nitsche, UCB 2 CHEM 1A L10: "Spin, Pauli Principle, Electronic Configs" Summary Ionization Energy (kJ) 2500 2000 1500 1000 500 0 1s2 2p6 2p 2p4 2p5 2p2 2p3 2p1 1s 2s 2s2 3s C N O F Ne Na L12-8 H He Li Be B © A.Pines,M.Kubinec,UCB Electronegativity Zeff n - Δ > 2.0 Ionic Na+Cl- - Electronegativity Partly Ionic Δ ~ 0.4-2.0 H+Cl0.4Covalent Cl - Cl Δ < 0.4 + © 2006Kubinec, Pines, Nitsche, UCB Na ~0.9 H ~ 2.2 Cl ~ 3.2 © A.Pines,M.Kubinec,UCB L12-10 L10-9 Dimitri Ivanovich Mendeleev’s First Rendition of the Periodic Table © 2006Kubinec, Pines, Nitsche, UCB L10-10 Dimitri Ivanovich Mendeleev Professor of Chemistry St. Petersburg University Founder of the Modern Periodic Table (1869) © 2006Kubinec, Pines, Nitsche, UCB L10-11 © 2006 Kubinec, Pines, Nitsche, UCB 3 CHEM 1A L10: "Spin, Pauli Principle, Electronic Configs" Orbital Filling for Elements in the Periodic Table © 2006Kubinec, Pines, Nitsche, UCB L10-12 Names for Groups in the Periodic Table © 2006Kubinec, Pines, Nitsche, UCB L10-13 Names for Groups in the Periodic Table (cont’d) (cont’d) © 2006Kubinec, Pines, Nitsche, UCB L10-14 © 2006 Kubinec, Pines, Nitsche, UCB 4 CHEM 1A L10: "Spin, Pauli Principle, Electronic Configs" © 2006Kubinec, Pines, Nitsche, UCB L10-15 Periodic Table Recommended by International Union of Pure and Applied Chemistry Chemistry (IUPAC) © 2006Kubinec, Pines, Nitsche, UCB L10-16 Ionization Energy, Electron Affinity X X + eM IE (kJ EA (kJ mol-1) mol-1) X+ + e- IE X- EA Na 496 -53 e- K 419 -48 Rb 403 -47 X IE (kJ EA (kJ mol-1) mol-1) Cl 1251 -349 Br 1140 -325 I 1008 -295 © 2006Kubinec, Pines, Nitsche, UCB L10-17 © 2006 Kubinec, Pines, Nitsche, UCB 5 CHEM 1A L10: "Spin, Pauli Principle, Electronic Configs" Alkali Metals in Water 2 M(s) + 2 H2O Redox Reaction 2M 2M +2e + - H2 + 2 MOH 2 H20 + 2 e- H2 + 2 O H - © 2006Kubinec, Pines, Nitsche, UCB L10-18 Lecture Complete © 2006Kubinec, Pines, Nitsche, UCB L10-19 © 2006 Kubinec, Pines, Nitsche, UCB 6 ...
View Full Document

This note was uploaded on 06/29/2010 for the course CHEM 1A taught by Professor Nitsche during the Spring '08 term at University of California, Berkeley.

Ask a homework question - tutors are online