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9 ч 44 мин, 16 окт 2006 г. - there are 117 different elements. The most recent elements discovered are meitnerium, darmstadtium, and ununquadium.

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History of the Periodic Table

Bylily heavner
3 окт 2017

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9 ч 44 мин, 16 окт 2006 г.
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