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9 jan 1939 ano - 1932 AD: James Chadwick, working with nuclear physics used alpha particles and discovered the neutron, the same mass as a proton and is found in the nucleus. They also had no charge and this model was a major improvement from Bohr’s model.

Adicionado na linha do tempo:

Data:

9 jan 1939 ano
Agora
~ 86 years ago

Imagens: