Atomic Theory

Timeline created by craye1234
  • Wilhelm Rontgen

    French physicist who, in 1896, while investigating fluorescence in uranium salts, Accidentally discovered radioactivity. The spontaneous emission of radiation by a material
  • Henri Becquerel

    He received the first Nobel prize in physics in 1901 finding out what electromagnets are.
  • Sir Joseph John Thompson

    Thomson has discovered the electron. From this point onward, it Becomes increasingly clear that atoms are not fundamental particles, but in fact are made Up of smaller particles.
  • Max Planck

    Formulated and equation describing the blackbody spectrum in 1900. Planks experiment was obtained by postulating that energy was directly proportional to frequency.
  • Ernest Rutherford

    Rutherford suggested the fundamental positively charged particle, Which he called the proton in 1914
  • Neils Bohr

    His model assumed that (1) The electron exists at precise distances from the Nucleus, (2) as long as an electron remains in one location, no energy is given off, (3) Electrons have circular or bitals), and (4) the angular Momenta associated with allow Electron motion are integral multiples.
  • Louis De Broglie

    French physicist who proposed that duality principal in 1923, which states that all particles have wave like properties and may be summarized by an equation.
  • James Chadwick

    Worked with the Rutherford on the bombardment of elements with alpha particles. In the 1920’s Rutherford and Chadwick attempted to find a uncharged elementary particle, but failed. This amounted to the discovery of the neutron.