atomic number 58,
ce,
cerium a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group
atomic number 64,
gadolinium,
gd a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group
atomic number 67,
ho,
holmium a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds
atomic number 65,
terbium,
tb a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
atomic number 70,
ytterbium,
yb a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime
