Ernest Rutherford wanted to look closer at ion-producing radiations. (He focused on Uranium, which he placed near a piece of foil and found some radiation deflect and the other goes right through the foil) (31 dez 1895 ano – 31 dez 1901 ano)

Descrição:

Labeled the two radiation parts Alpha (identical to a Helium nucleus) and Beta ( The same as an electron)

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