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9 h 44 m, 16 out 2006 ano - 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 out 2017
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0
432

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9 h 44 m, 16 out 2006 ano
Agora
~ 17 years ago
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