1 févr. 1897 - 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.
Ajouté au bande de temps:
Date:
1 févr. 1897
Maintenaint
~ Il y a 127 ans
