J.J. Thomson research on cathode rays proved existence of electrons (1896). Nobel Prize in 1906.
Death of Amedeo Avogadro
J.J. Thomson was born
Marie Curie and Pierre Curie, discovered and isolated radium and polonium (1898). Studied radioactivity of uranium. And won the Nobel Prize in 1903 (with Becquerel) in physics; in chemistry 1911.
Marie Curie was born
Ernest Rutherford discovered that uranium radiation is composed of positively charged 'alpha' particles and negatively charged 'beta' particles (1989/1899). First to prove radioactive decay of heavy elements and to perform a transmutation reaction (1919).
Ernest Rutherford was born
Albert Einstein is born
Hans Geiger was born
Max Born is born
Niels Bohr was born
Erwin Schrödinger was born
Discovered radioactivity of uranium (1896) and deflection of electrons by magnetic fields and gamma rays. And won the Nobel Prize in 1903 (with the Curies).
J.J. Thomson discovered the electron. Used a cathode ray tube to experimentally determine the charge to mass ratio of an electron. Found that 'canal rays' were associated with the proton H+.
Death of Robert Bunsen
Werner Heisenberg developed the orbital theory of chemical bonding. Described atoms using a formula related to the frequencies of spectral lines. Stated the Uncertainity Principle (1927). And won the Nobel Prize in 1932.
Werner Heisenberg is born
Death of Henri Becquerel
Ernest Rutherfordat demonstrated that alpha particles are doubly ionized helium atoms
Niels Bohr devised quantum model of the atom in which atoms had orbital shells of electrons.
Richard Feynman was born
Werner Heisenberg stated the quantum uncertainty principle. Described atoms using a formula based on the frequencies of spectral lines.
Peter Higgs was born
Schodinger described electrons as continuous clouds. Introduced 'wave mechanics' to mathematically describe the atom.
