Neutrons & Isotopes (jan 1, 1932 – may 7, 1932)
Description:
In 1932 James Chadwick first discovered neutrons, and isotopes were identified. This was the complete basis for the periodic table. In that same year Englishman Cockroft and the Irishman Walton first split an atom by bombarding lithium in a particle accelerator, changing it to two helium nuclei.
Added to timeline:
History of the Periodic Table
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