Chem Lec 20100908

Chem Lec 20100908 - Welcome to Welcome to Chemistry 110...

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Unformatted text preview: Welcome to Welcome to Chemistry 110 Chemistry 110 General Chemistry General Chemistry Prof. Ian Butler Dept. of Chemistry Otto Maass Bldg. Room 427 Tel: 514-398-6910 OFFICE HOURS OFFICE HOURS Mondays: 2:00-4:00 pm (unless otherwise stated) Otto Maass Chemistry Building Room 427 FINAL EXAMINATION FOR CHEM 110 THE EXAMINATION PERIOD IS BETWEEN DECEMBER 6-21, 2010, INCLUSIVE. DO NOT MAKE ANY TRAVEL PLANS BEFORE DECEMBER 22, 2010 LABORATORY QUESTIONS LABORATORY QUESTIONS All questions about laboratory schedules and related problems should be directed directly to Dr. Jean-Marc Gauthier either through webCT or by going to Room 1 in the basement of the Otto Maass Chemistry Building. A scanned version of this book will be on sale at the Bookstore next week. ~$30 THE BEGINNING OF THE COURSE! Electromagnetic Force Electromagnetic Force Coulombs law: charged bodies Force on Body 1 by Body 2 (charges q 1 q 2 ) 1,2 2 o 2 1 1,2 r r 4 & q q (r) F & = & 1 2 1,2 r o = Permittivity of free space = 8.854 x 10-12 F . m-1 Electromagnetic Force Electromagnetic Force Opposite charges: q 1 q 2 < 0 Body 1 is pushed toward Body 2: Attraction 1,2 2 o 2 1 1,2 r r 4 & q q (r) F & = & 1 2 1,2 r 1,2 F & Opposites attract! Electromagnetic Force Electromagnetic Force Like charges: q 1 q 2 > 0 Body 1 pushed away from Body 2: Repulsion 1,2 2 o 2 1 1,2 r r 4 & q q (r) F & = & 1 2 1,2 r 1,2 F & Electromagnetic Force Electromagnetic Force Like charges: q 1 q 2 > 0 Body 1 pushed away from Body 2: Repulsion 1,2 2 o 2 1 1,2 r r 4 & q q (r) F & = & 1 2 1,2 r 1,2 F & Likes repel! Electromagnetic Force Electromagnetic Force Coulombs law: charged bodies Force depends on the square of the distance 1,2 2 o 2 1 1,2 r r 4 & q q (r) F & = & 1 2 1,2 r Inverse square law Electromagnetic Force Electromagnetic Force Electromagnetic force rules in Chemistry Attraction & repulsion influence properties e- e- Repulsion between electrons Electromagnetic Force Electromagnetic Force Electromagnetic force rules in Chemistry Attraction & repulsion influence properties p + e- Attraction between electrons & protons Review: Atomic Structure Chap. 2 Review: Atomic Structure Chap. 2-3 Electrons carry negative charge Small particles (wavelike properties too!) They define the extent of an atom 10-10 m = 0.1 nm = 1 Electron cloud Review: Atomic Structure Chap. 2 Review: Atomic Structure Chap. 2-3 Nucleus Positively charged protons Neutral neutrons 10-10 m = 0.1 nm = 1 10-14 m = 10 fm Nucleus Review Atomic Review Atomic Particles Particles Chap. 2 Chap. 2-3 Protons: mass 1.673 x 10-27 kg Neutrons: mass 1.675 x 10-27 kg Electron: mass 9.109 x 10-31 kg + Proton: p atomic charge +1 SI units: +1.602 x 10-19 C Neutron: n neutral charge- Electron: e atomic charge -1 SI units: -1.602 x 10-19 C Elements and Isotopes Chap. 2 Elements and Isotopes Chap. 2-4...
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This note was uploaded on 09/29/2010 for the course SCIENCE 120 taught by Professor Frenser during the Spring '10 term at McGill.

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Chem Lec 20100908 - Welcome to Welcome to Chemistry 110...

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