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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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INFOTEXT
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1992-09-03
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268b
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7 lines
In atomic physics certain numbers of neutrons
or protons (2, 8, 20, 28, 50, 82, 126) in the
nuclei of elements of outstanding stability
such as lead and helium. Such stability is
the result of for neutrons and protons being
arranged in completed `layers' or `shells'.