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23 sett 1870 anni - JJ Thomson- discovered the first subatomic particle--negatively charged electrons using the cathode ray tube; his atomic model was the plum pudding model (atoms were solidly positive with electrons floating in the positive)
Aggiunto al nastro di tempo:
29 gen 2020
0
0
208
Atomic convention
Data:
23 sett 1870 anni
Adesso
~ 153 years ago