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 electrons 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 = 5.0 x 10 14 s-1 ....
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2045 Fig and Tables - 110 known elements, 90 are natural...

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