Events
George de Hevesy uses radiation as a tracerJames Chadwick discovers the neutronFirst nuclear weapon used against another countrySecond nuclear weapon used against JapanFirst commercial Nuclear reactor activated in U.SU.S.S Nautilus launched, first ship nuclear reactorFirst commercial nuclear reactor (USSR)Uranium Discovered by Martin KlaprothWilhelm Rontgen discovers ionizing radiationHenri Becquerel discovers beta radiation and alpha particlesPierre and Marie Curie name phenomenon "radioactivity"Radium used for medical treatmentSamuel Prescott destroys bacteria with radiation in foodErnest Rutherford discovers new elements from radiation.Ernest Rutherford fires alpha particles into nitrogen, and creates an oxygen atomPeriods
Niels Bohr researches how atoms and electron particles are arranged
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