26 mar 1932 ano - James Chadwick: Played a vital role in the atomic theory, as he discovered the Neutron in atom; Neutrons are located in the center of an atom, in the nucleus along with the protons. They have neither a positive nor negative charge, but contribute the the atomic weight with the same effect as a proton.

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Atomic Theory Timeline Project

Byleah

21 out 2018

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