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Radioactive
1983
Russian radioactive satellite falls into Indian Ocean
1951
1st battery to convert radioactive energy to electrical announced
1936
1st radioactive isotope medicine administered, Berkeley, California
1936
1st radioactive substance produced synthetically (radium E)
1902
Marie and Pierre Curie isolate radioactive element radium
1902
Marie and Pierre Curie isolated the radioactive element radium
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