Marie curie atomic theory series#

1895 – Wilhelm Conrad Röntgen discovers X-rays in experiments with electron beams in plasma.

Marie curie atomic theory series#

1888 – Johannes Rydberg modifies the Balmer formula to include all spectral series of lines for the hydrogen atom, producing the Rydberg formula which is employed later by Niels Bohr and others to verify Bohr's first quantum model of the atom.1888 – Hertz demonstrates experimentally that electromagnetic waves exist, as predicted by Maxwell.1887 – Heinrich Hertz discovers the photoelectric effect, shown by Einstein in 1905 to involve quanta of light.1885 – Johann Jakob Balmer discovers a numerical relationship between visible spectral lines of hydrogen, the Balmer series.1877 – Boltzmann suggests that the energy levels of a physical system could be discrete based on statistical mechanics and mathematical arguments also produces the first circle diagram representation, or atomic model of a molecule (such as an iodine gas molecule) in terms of the overlapping terms α and β, later (in 1928) called molecular orbitals, of the constituting atoms.Boltzmann argues that entropy is a measure of disorder. 1860–1900 – Ludwig Eduard Boltzmann, James Clerk Maxwell and others develop the theory of statistical mechanics.1859 – Gustav Kirchhoff introduces the concept of a blackbody and proves that its emission spectrum depends only on its temperature.1801 – Thomas Young establishes that light made up of waves with his Double-slit experiment.The shadow of a metal Maltese Cross placed between the plate and the uranium salt is clearly visible. The timeline of quantum mechanics is a list of key events in the history of quantum mechanics, quantum field theories and quantum chemistry.ġ9th century Image of Becquerel's photographic plate which has been fogged by exposure to radiation from a uranium salt. ( April 2012) ( Learn how and when to remove this template message) Statements consisting only of original research should be removed.

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