Ch_07a - Chapter 7 Atomic Structure Classical View...

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Chapter 7 Atomic Structure Classical View – discovery of electrons and properties of electrons Experiments with Light – Quantum Theory Quantum View – behavior of electrons in atoms 2 The Classic View of Atomic Structure Discovery of electrons and properties of electrons
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3 Cathode Rays Cathode rays are the carriers of electric current from cathode to anode inside a vacuumed tube Emit perpendicular to the cathode surface when electricity is passed through an evacuated tube . .. ... and travel in straight lines 4 Cathode Rays Cause glass and other materials to fluoresce Deflect in a magnetic field as expected for negatively charged particles Cathode ray properties are independent of materials in the tube
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5 J. J. Thomson’s Experiment Devised an experiment to find the ratio of the cathode ray particle’s mass ( m e ) to the charge ( e ) m e / e = –5.686 × 10 –12 kilogram per coulomb (kg C –1 ) (1856-1940) (Compare H + ion) +1.045 × 10 8 kg/C 6 The Electron Stoney in 1874 coined the term “electron”-
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This note was uploaded on 05/06/2008 for the course CHEM 103 taught by Professor Forgot during the Spring '07 term at CUNY City.

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Ch_07a - Chapter 7 Atomic Structure Classical View...

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