US
GA| Monikko | thalliums |
A metallic chemical element (symbol Tl) with atomic number 81: a gray post-transition metal that discolors when exposed to air.
Pieces of very pure thallium in glass ampoule under argon.
A metallic chemical element (symbol Tl) with atomic number 81: a gray post-transition metal that discolors when exposed to air.
A corroded thallium rod