2045 Fig and Tables

2045 Fig and Tables - • 110 known elements 90 are natural...

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Unformatted text preview: • 110 known elements, 90 are natural Element • May exist as allotropes - different structural forms Element • Evacuated of gases • Negative beam projects from (-)cathode to (+)anode • Beam velocity less than speed of light, therefore particles • All cathode materials generate the same beam, therefore particles part of all atoms • The magnitude of deflection of electron beam in electric field gives measure of the electron’s charge to mass ratio • e = 1.76 x 10 8 coul m g CRT Eugen Goldstein Hydrogen gas added to CRT: B. The Proton, p+ or H+ • H + called “hydrogen ion” or “ proton ” • Carries fundamental unit of positive charge (magnitude same as e- charge) • Defined as • Mass = 1.67 x 10-24 g H + e- H + + 2e- Ion = Atom that carries net + or – charge(s) unit positive charge, +1 The Nuclear Model Ernst Rutherford, 1910 Mass Spectrometer 11 5 B 54 26 Fe 2+ 26 28 24 2+ 31 15 P 3- 15 196 79 Au 222 86 Rn 86 EMR Spectrum A shade of green light has a ν = 5.0 x 10 14 s-1 ....
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This note was uploaded on 11/16/2011 for the course CHM 2045 taught by Professor Mitchell during the Fall '07 term at University of Florida.

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2045 Fig and Tables - • 110 known elements 90 are natural...

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