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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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26 ene 1940 año - Glenn Seaborg synthesises transuranic elements (the elements after uranium in the periodic table)
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Periodic Table Timeline
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10 oct 2017
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26 ene 1940 año
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~ 85 years ago
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