| atomic number | a toxic nonmetallic element related to sulfur and tellurium |
|---|---|
| atomic number | a nonmetallic largely pentavalent heavy volatile corrosive dark brown liquid element belonging to the halogens |
| atomic number | a colorless element that is one of the six inert gasses |
| atomic number | a soft silvery metallic element of the alkali metal group |
| atomic number | a soft silver-white or yellowish metallic element of the alkali metal group |
| atomic number | a silvery metallic element that is common in rare-earth minerals |
| atomic number | a light strong brittle gray toxic bivalent metallic element |
| atomic number | a lustrous gray strong metallic element resembling titanium |
| atomic number | a soft gray ductile metallic element used in alloys |
| atomic number | a polyvalent metallic element that resembles chromium and tungsten in its properties |
| atomic number | a crystalline metallic element not found in nature |
| atomic number | a rare polyvalent metallic element of the platinum group |