CHEM 1211 Chapter Notes - Chapter 2: Uraninite, Ion, Init

• School: Northeastern University
• Department: Chemistry & Chemical Biology
• Course: CHEM 1211
• Professor: Christopher Toher

Document Summary

2. 1 the rutherford model of atomic structure: realized that the atom may not be the smallest particle, instead, there are electrons floating around the nucleus of protons and neutrons, anode positive, cathode negative, thomson used the laser emitted by a cathode ray to determine the mass to charge ratio of particles, millikan developed within 1%, the charge of an electron, so that thomson could determine the mass, henri becquerel, ernest rutherford, marie and pierre curie, showed that radiation is actually types of rays, radioactivity the spontaneous emission of high energy radiation and particles by materials such as pitchblende, rutherford discovered and named two emitted particles, beta particle (electrons) penetrate better than alpha particles. High energy: alpha particle deflected in the opposite direction of the beta particles in the same electric and magnetic fields, 1000 time more massive than beta particles, later found out that bombarding atoms with alpha particles could actually change (transmute) the element of the atom.