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Nuclear radiation

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Events

George de Hevesy uses radiation as a tracer James Chadwick discovers the neutron First nuclear weapon used against another country Second nuclear weapon used against Japan First commercial Nuclear reactor activated in U.S U.S.S Nautilus launched, first ship nuclear reactor First commercial nuclear reactor (USSR)Uranium Discovered by Martin Klaproth Wilhelm Rontgen discovers ionizing radiation Henri Becquerel discovers beta radiation and alpha particles Pierre and Marie Curie name phenomenon "radioactivity"Radium used for medical treatment Samuel Prescott destroys bacteria with radiation in food Ernest Rutherford discovers new elements from radiation.Ernest Rutherford fires alpha particles into nitrogen, and creates an oxygen atom

Periods

Niels Bohr researches how atoms and electron particles are arranged

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