Which scientist discovered the radioactive element radium?
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Marie and Pierre Curie discovered the radioactive element radium.
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Pierre Curie
On April 20, 1902, Marie and Pierre Curie successfully isolate radioactive radium salts from the mineral pitchblende in their laboratory in Paris. In 1898, the Curies discovered the existence of the elements radium and polonium in their research of pitchblende.
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