1 feb 1897 año - 1896 AD:
Frederick Soddy, a radio-chemist
who worked in nuclear chemistry
studied the 1896 radioactivity
phenomenon and he discovered
after a chain of experiments that
atoms could have the same chemical
properties but can change those
properties when it came to radioactivity.
In 1913 Soddy claimed a new theory
that atoms can have isotopes that
change its weight.
Añadido al timeline:
The history of the atomic model
fecha:
