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30 дек 1895 г. - Henri Becquerel

Описание:

While studying the effect of x-rays on photographic film, he discovered some chemicals spontaneously decompose and give off very pentrating rays.

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Scientific method of atom

ByNashua Lovett

11 дек 2018

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30 дек 1895 г.

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~ 129 г назад

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