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the discovery of the artificial transmutation of uranium in 1934
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uranium had the most number of protons of any known element (92)
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chemical analyst Fritz Strassman began investigating neutron-induced uranium decay
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Hahn was sure of the chemical evidence of transuranes
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the political situation in Germany had become dangerous for Meitner
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Hahn was awarded the Nobel Prize in chemistry
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Lise Meitner dies