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31 дек 1912 г. - J.J. Thomson discovered isotopes of stable elements
Добавлено на ленту времени:
Atomic Theory - Jessica Ashton
By
Jess Ashton
27 сен 2017
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0
1236
Дата:
31 дек 1912 г.
Сейчас
~ 112 г назад
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