dec 16, 1919 - Ernest Rutherford
Description:
is credited with the discovery of the proton when he notices the signatures of hydrogen nuclei when alpha particles are shot into nitrogen gas. In these experiments, he also became the first person to transmute one element into another (nitrogen into oxygen) through a deliberate man-made nuclear reaction.Added to timeline:
Date:
dec 16, 1919
Now
~ 106 years ago