solid homogeneous inorganic substances occurring in nature having a definite chemical composition

a light strong brittle grey toxic bivalent metallic element

a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group

a trivalent metallic element of the rare earth group; occurs with yttrium

a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group

a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds

a light strong brittle grey toxic bivalent metallic element

a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group

a trivalent metallic element of the rare earth group; occurs with yttrium

a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group

a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds