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, thallium.
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Words linked to "Tl" : zinc blende, atomic number 81, blende, sphalerite, metallic element, thallium, metal |
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