CHEMISTRY FINAL EXAM REVIEW - Henri Becquerel Studying...

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CHEMISTRY FINAL EXAM REVIEW Experiments Dalton’s Atomic Theory: 1) elements composed of atoms 2) all atoms of an element have same property 3) atoms cannot be destroyed or created 4) compounds formed when atoms combine in small whole number ratios 5) relative number and kinds of atoms constant in different compounds J.J. Thompson: Cathode ray tube with perpendicular magnetic and electric fields. Rays pass through positive plate and are deflected by magnetic and electric fields. ** “electron,” charge to mass ratio of electron Robert Milikan: Oil drop experiment. Drops of oil passed between charged plates. **charge on electron, mass of electron (using Thompson’s ratio)
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Unformatted text preview: Henri Becquerel: Studying uranium, it emitted high energy radiation spontaneously. **radiation Marie Curie: Isolated radioactive compounds of Becquerel’s Uranium. **polonium, radium Ernest Rutherford: Radiation electric field. **3 types of radiation: 1) Beta – negative, low mass 2) Gamma – neutral, no mass 3) Alpha – positive, high mass Gold Foil Experiment. Alpha particles were beamed through thin gold foil. Most of the particles went through, only a few were scattered. **positive, dense nucleus because few deflections **volume mostly electron cloud because most particles passed through...
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