13 ч 28 мин, 1 янв 1919 г. - Ernest Rutherford

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Succeeds in getting an a-particle (i.e., a helium nucleus) to react with a nitrogen nucleus to produce a proton (i.e., a hydrogen nucleus) and an oxygen nucleus. Rutherford has brought about the first human-engineered nuclear reaction. Also, this makes him the first person in history to change one element into another.

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