1 jan 1898 ano - Marie and Pierre Curie discovered the radioactive elements radium and polonium.
Descrição:
Before this discovery, uranium and thorium were the only known radioactive elements. While studying uranium minerals, Marie Curie noticed that two minerals were more radioactive than uranium. She and her husband, Pierre, chemically separated the compounds in the minerals and found a substance 400 times more radioactive than uranium. Marie named this substance polonium after her native country of Poland. The Curies also found that one of the uranium minerals contained another element more radioactive than uranium. They named this element radium. The Curies won the 1903 Nobel Prize in physics for these discoveries.
Marie Curie won the Nobel Prize in chemistry in 1910 for obtaining element radium in the metallic state. She was the first person to win the Nobel Prize twice.
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Melissa
Nuclear Chemistry Timeline
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