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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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11 feb 1922 año - Niels Bohr proposed an atomic structure theory that stated the outer orbit of an atom could hold more electrons than the inner orbit.
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Tommy Worcester
27 sep 2017
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11 feb 1922 año
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~ 103 years ago
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