The discovery of radioactivity

  title={The discovery of radioactivity},
  author={Pierre Radvanyi and Jacques Villain},
  journal={Comptes Rendus Physique},
Abstract The radioactivity of uranium was discovered in 1896 by Henri Becquerel who, starting from a wrong idea, progressively realized what he was observing, regularly informing the French Academy of Sciences of the progress he was doing. In the next years, it was found that thorium was radioactive too, and two new radioactive elements, polonium and radium, were discovered by Pierre and Marie Curie, while a third one, actinium, was identified by Andre Debierne. The study of the penetrating… 
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