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Amedeo Avogadro he proposes Avogadro's law
Henri Becquerel he discovered radioactivity.
Niel Bohr Bohr developed the Bohr model of the atom
Robert Boyle he proposed Boyle's law
Robert Bunsen He discovered caesium and rubidium
Henry Cavendish discovery of hydrogen
Marie Curie and Pierre Curie They discovered polonium and radium together.
Humphry Davy isolate alkaline earths metals
John Dalton proposes the modern atomic theory
Otto Hahn discovery of nuclear fission
Charles Martin Hall invention of an inexpensive method for producing aluminum
Irene Joliet-Curie and Frederic Joliet- Curie discovery of artificial radioactivity
Antoine Lavoisier discovery of the role oxygen plays in combustion.
Dimitri Mendeleev created a farsighted version of the periodic table of elements
lise Meitner first discovered nuclear fission of uranium
Henry Moseley development of Moseley's law in X-ray spectra.
Joseph Priestley discovery of oxygen, having isolated it in its gaseous state
Wilhelm Roentgen produced and detected electromagnetic radiation in a wavelength range known as X-rays
Ernest Rutherford discovered the concept of radioactive half-life
Carl Wilhelm Scheele identified molybdenum, tungsten, barium, hydrogen, and chlorine
Glenn Seaborg discovery and investigation of ten transuranium elements
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