jan 1, 1902 - Marie Curie Discovery
Description:
She discovered that radioactivity does not depend on how atoms are arranged into molecules, it depends on what originates within the atoms themselves.She isolated radioactive radium salts from the mineral pitchblende. She discovered the existence of the elements radium and polonium in their research of pitchblende.
Added to timeline:
Date:
jan 1, 1902
Now
~ 123 years ago