The rare earth elements are:
yttrium Y
lanthanum La
cerium Ce is the most abundant rare earth element in the Earth's crust
praseodymium Pr
neodymium Nd
promethium Pm has no long-lived nuclei and therefore no natural abundance and no long-lived compounds
samarium Sm
europium Eu
gadolinium Gd
terbium Tb
dysprosium Dy
holmium Ho
erbium Er
thulium Tm
ytterbium Yb
lutetium Lu
Scandium, Sc, is sometimes also considered to be a rare earth element.
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