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Ununquindecium


121

Uuh

Ununquindecium
294.00000
2
8
18
32
8
2
2
33

Source

Ununquindecium is a synthetic chemical element with the symbol Uuh and atomic number 121. It is an extremely radioactive synthetic element. Ununquindecium was first created in 1994 by the GSI Helmholtz Centre for Heavy Ion Research near Darmstadt, Germany.