Answer: rareearthmetals

AnswerCrossword Clue
RAREEARTHMETALSWith an atomic number 57 through 71
RAREEARTHMETALSYttrium and lutetium, e.g
RAREEARTHMETALSCerium and erbium, e.g.
RAREEARTHMETALSCerium and yttrium, for two
RAREEARTHMETALSErbium, terbium and the like