Description
تفصیل
is a chemical element with the symbol Tl and atomic number 81. This soft gray poor metal resembles tin but discolors when exposed to air. The two chemists William Crookes and Claude-Auguste Lamy discovered thallium independently in 1861 by the newly developed method of flame spectroscopy. Both discovered the new element in residues of sulfuric acid production.
Approximately 60–70% of thallium production is used in the electronics industry, and the remainder is used in the pharmaceutical industry and in glass manufacturing
Thallium (Greek θαλλός, thallos, meaning "a green shoot or twig") was discovered by flame spectroscopy in 1861.The name comes from thallium's bright green spectral emission lines
