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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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13 ene 1940 año - Edwin McMillan and Philip H. Abelson identify neptunium, the lightest and first synthesizes transuranium element, found in the products of uranium fission.
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13 ene 1940 año
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~ 85 years ago
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