| atom | a brittle silver-white metalloid element that is related to selenium and sulfur |
|---|---|
| atom | a nonmetallic element belonging to the halogens |
| atom | a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts |
| atom | a soft silver-white ductile metallic element (liquid at normal temperatures) |
| atom | a soft silvery metallic element of the alkali earth group |
| atom | a white soft metallic element that tarnishes readily |
| atom | a ductile gray metallic element of the lanthanide series |
| atom | a soft yellowish-white trivalent metallic element of the rare earth group |
| atom | an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond |
| atom | a yellow trivalent metallic element of the rare earth group |
| atom | a soft silvery metallic element of the rare earth group having no stable isotope |
| atom | a gray lustrous metallic element of the rare earth group |