14 h 19 m, 19 jul 1885 año - Niels Bohr
Descripción:
He proposed that electrons are in an orbit and when they get excited they go to a higher orbit but when they fall they give off light.Añadido al timeline:
fecha:
14 h 19 m, 19 jul 1885 año
Ahora mismo
~ 139 years ago
