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Atoms of the same element can have different numbers of neutrons; the different possible versions of each element are called isotopes.
A brief description of how these devices detect smoke, exploring the two most common types used today: photoelectric and ionization detectors. Part of Marshall Brain's HowStuffWorks.com. Assumes ...
Online exhibits including Marie Curie and the Discovery of Radioactivity, the History of the Transistor, Albert Einstein, the Discovery of the Electron; Heisenberg, and Sakharov.
Enrico Fermi received the Nobel Prize for Physics in 1938 for his work on the artificial radioactivity produced by neutrons, and for nuclear reactions brought about by slow neutrons. A good biography ...
Irene Joliot-Curie (1897 - 1956) did important work on natural and artificial radioactivity, transmutation of elements, and nuclear physics; she shared the Nobel Prize for Chemistry in 1935 with her ...
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