15 h 19 m, 14 mayo 1899 año - Ernest Rutherford proved Dalton wrong

Descripción:

Ernest Rutherford performed an experiment that separated radiation into three types, the alpha, beta and gamma, based on penetration of objects and ability to cause ionization. Rutherford described the alpha particles to have the lowest penetration of ordinary objects compared to beta and gamma particles.

Añadido al timeline:

fecha: