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Wilhelm Röntgen was the discoverer in 1895 of what we usually think of when we hear the term "radiation." More specifically, Röntgen discovered x rays. Marie Curie did coin the term "radioactivity," but it was the French physicist Henri Becquerel who actually discovered radioactivity in 1896. Even that last point is in dispute-there are those who argue that the French chemist Niepce de Saint Victor should be given credit for the discovery.

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13y ago

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