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A Chronology of Nuclear History (with an emphasis on fluid-fueled reactors)

1829Jons Berzelius discovers a new element, thorium, in samples sent to him by the Reverend Hans Esmark. Thorium will later be found to be somewhat abundant in the Earth’s crust. 1896Henri Becquerel discovers that pitchblende, an ore containing uranium, causes a photographic plate to darken. 1897J.J. Thomson discovers the first subatomic particle, the negatively-charged electron. […]