day 1 history of an atom

By 20czaplewskijo
  • 460 BCE

    Democritus 460BCE-370BCE

    Democritus 460BCE-370BCE
    everything is composed of atoms

  • John Dalton 9/1766-7/1844

    John Dalton 9/1766-7/1844
    all mater was composed of atoms

  • Dmitri Mendeleev 2/1834-2-1907

    Dmitri Mendeleev 2/1834-2-1907
    created first periodic table

  • Eugene Goldstein 9/1850-12/1930

    Eugene Goldstein 9/1850-12/1930
    study of the cathode, discovered protons

  • J.J Thomson 12/1856-8/1940

    J.J Thomson 12/1856-8/1940
    discovered the electron

  • Max Planck 4/1858-10/1947

    Max Planck 4/1858-10/1947
    describe the behavior of particles and waves at the atomic scale

  • Robert Millikan 3/1868-12/1953

    Robert Millikan 3/1868-12/1953
    the electric charge carried by a single charge, all drops had charges

  • Ernest Rutherford 8/1871-10/1937

    Ernest Rutherford 8/1871-10/1937
    demonstrated that the atom has a tiny and heavy nucleus

  • Niels Bohr 10/1885-11/1962

    Niels Bohr 10/1885-11/1962
    the hydrogen atom, energy is only transferred in certain well-defined quantities

  • Erwin Schrodinger 8/1887-1/1961

    Erwin Schrodinger 8/1887-1/1961
    electron cloud model probability of finding electrons in orbits

  • James Chadwick 10/1891-7/1974

    James Chadwick 10/1891-7/1974
    bombarded beryllium atoms with alpha particles and an unknow radiation occurred

  • Werner Heisenberg 12/1901-2/1976

    Werner Heisenberg 12/1901-2/1976
    atomic theory, particles position, and momentum can not both be known exactly