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Level 4
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Antimon
Sb
Tellur
Te
Iod
I
Xenon
Xe
Caesium
Cs
Barium
Ba
Lanthan
La
Cer
Ce
Praseodym
Pr
Neodym
Nd
Promethium
Pm
Samarium
Sm
Europium
Eu
Gadolinium
Gd
Terbium
Tb
Dysprosium
Dy
Holmium
Ho
Erbium
Er
Thulium
Tm
Ytterbium
Yb
Lutetium
Lu
Hafnium
Hf
Tantal
Ta
Wolfram
W
Rhenium
Re
