Braineos2

terbium

Tb

lanthanum

La

europium

Eu

gadolinium

Gd

erbium

Er

promethium

Pm

holmium

Ho

neodymium

Nd

praseodymium

Pr

dysprosium

Dy

thulium

Tm

cerium

Ce

samarium

Sm

ytterbium

Yb



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