AIP EMILIO SEGRE VISUAL ARCHIVES / SCIENCE PHOTO LIBRARY AIP EMILIO SEGRE VISUAL ARCHIVES / SCIENCE PHOTO LIBRARY
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Bohr's radium atom. Illustration showing the structure of a Radium atom as theorised by the Danish physicist Niels Bohr (1885-1962). Bohr made numerous contributions to physics during his career, but it was his work on the structure of atoms that won him the 1922 Nobel Prize. Following Ernest Rutherford's discovery of the nucleus, Bohr described the atom as a small, positively charged nucleus surrounded by waves of electrons with discrete (quantised) energies. Though associated with the Manhattan Project in World War II, he dedicated his later life to peaceful applications of atomic physics. Image from the 'The Atom and the Bohr Theory of It's Structure' by Hendrik Anthony 'Hans' Kramers and Helge Holst, 1926.
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