1 févr. 1900 - Soddy (1900)- observed spontaneous disintegration of radioactive element into variants he called “isotopes” or totally new elements, he discovered “half-life”, and made initial calculations on the amount of energy that is released during decay
Ajouté au bande de temps:
Date:
1 févr. 1900
Maintenaint
~ Il y a 124 ans
