what is its atomic number?
81.
Thallium
Thallium is a chemical element with the symbol Tl and atomic number 81.
what is thallium? A chemical element. what are its characteristics? A thallium atom has 81 electrons arranged in the configuration [Xe]4f5d6s6p. It is malleable and sectile enough o be cut with a knife at room temperature. It has a metallic luster. how many isotopes does it have? 41. how is it produced? It is obtained as a by-product of smelting of copper, zinc, and lead ores. is it used in medicines? It is used for stress tests for risk stratification in patients with coronary artery disease. what are the symptoms of the disease that you just mentioned? Angina, shortness of breath, sweating , nausea or vomiting and lightheadedness. can the element you mentioned before be used in electronics? Yes, it is used in photoresistors. what are these? A passive component that decreases resistance with respect to receiving luminosity on the component's sensitive surface.. is the element you mentioned before toxic? Yes, and in cases fatal. has anybody ever died from it? Yes. can you please name some compounds that it is part of? Organothallium compounds like trimethylthallium and triethylthallium. how does it occur in nature? In nature it is mostly found with potassium-based minerals in clays, soils, and granites. how does it occur in nature? In nature it is mostly found with potassium-based minerals in clays, soils, and granites. do you know what is its symbol? TI .
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Thallium [SEP] Introduction
Thallium is a chemical element with the symbol Tl and atomic number 81. It is a gray post-transition metal that is not found free in nature. When isolated, thallium resembles tin, but discolors when exposed to air. Chemists William Crookes and Claude-Auguste Lamy discovered thallium independently in 1861, in residues of sulfuric acid production. Both used the newly developed method of flame spectroscopy, in which thallium produces a notable green spectral line. Thallium, from Greek , , meaning "a green shoot or twig", was named by Crookes. It was isolated by both Lamy and Crookes in 1862; Lamy by electrolysis, and Crookes by precipitation and melting of the resultant powder.