A soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores. Synonyms: atomic number 81, Tl.
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Words linked to "Thallium" : Tl, metal, metallic element, zinc blende, blende, atomic number 81, sphalerite |
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