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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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1 Jan 1913 Jahr - Niels Bohr Proposed electrons can jump around but only in prescribed orbits. (1913)
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Austin
21 Sep 2017
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Datum:
1 Jan 1913 Jahr
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~ 112 years ago
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