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Neutrons
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Neutron discovered in 1932 by James Chadwick, Great Britain
James Chadwick
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Frederic Joliot and Irene Curie discover transmutation of elements in 1934 (alchemy)
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Enrico Fermi, Italy, extends research on transmutation of elements in 1934
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Fermi uses Nobel Prize Ceremony in 1938 to flee Italy with his Jewish wife
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Escapes to Columbia University, New York
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In alchemical terms, the neutron is the Philosopher's Stone
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Isolated neutrons are unstable, with a half life of 10 minutes
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n -> p+ + e- + neutrino
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Free neutrons are rare on earth, typically 1/min to 1/sec
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In atoms, neutrons typically outnumber protons
Number of protons vs. number of neutrons
