|
atomic number
|
a soft silvery metallic element of the alkali earth group |
|
atomic number
|
a white soft metallic element that tarnishes readily |
|
atomic number
|
a ductile gray metallic element of the lanthanide series |
|
atomic number
|
a soft yellowish-white trivalent metallic element of the rare earth group |
|
atomic number
|
an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond |
|
atomic number
|
a yellow trivalent metallic element of the rare earth group |
|
atomic number
|
a soft silvery metallic element of the rare earth group having no stable isotope |
|
atomic number
|
a gray lustrous metallic element of the rare earth group |
|
atomic number
|
a bivalent and trivalent metallic element of the rare earth group |
|
atomic number
|
a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group |
|
atomic number
|
a metallic element of the rare earth group |
|
atomic number
|
a trivalent metallic element of the rare earth group |
