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Tellurium belongs to the chalcogen (group 16) family of elements on the periodic table, which also includes oxygen, sulfur, selenium and polonium: Tellurium and selenium compounds are similar. Tellurium exhibits the oxidation states −2, +2, +4 and +6, with +4 being most common.
Polonium was named after Marie Skłodowska-Curie's homeland of Poland, which at the time was partitioned between three countries. Polonium has few applications, and those are related to its radioactivity: heaters in space probes, antistatic devices, sources of neutrons and alpha particles, and poison (e.g., poisoning of Alexander Litvinenko ...
The telluride ion is the anion Te 2− and its derivatives. It is analogous to the other chalcogenide anions, the lighter O 2−, S 2−, and Se 2−, and the heavier Po 2−. [1]In principle, Te 2− is formed by the two-e − reduction of tellurium.
Tellurium compounds are compounds containing the element tellurium (Te). Tellurium belongs to the chalcogen (group 16) family of elements on the periodic table, which also includes oxygen, sulfur, selenium and polonium: Tellurium and selenium compounds are similar. Tellurium exhibits the oxidation states −2, +2, +4 and +6, with +4 being most ...
Tellurium often has unpleasant effects (although some organisms can use it), and polonium (especially the isotope polonium-210) is always harmful as a result of its radioactivity. Sulfur has more than 20 allotropes , oxygen has nine, selenium has at least eight, polonium has two, and only one crystal structure of tellurium has so far been ...
The chalcogens react with each other to form interchalcogen compounds. [1]Although no chalcogen is extremely electropositive, [note 1] nor quite as electronegative as the halogen fluorine (the most electronegative element), there is a large difference in electronegativity between the top (oxygen = 3.44 — the second most electronegative element after fluorine) and bottom (polonium = 2.0) of ...
Tellurium forms a series of anionic tellurites and tellurates such as Na 2 TeO 3, Na 6 TeO 6, and Rb 6 Te 2 O 9 (the last containing tetrahedral TeO 2− 4 and trigonal bipyramidal TeO 4− 5 anions), [158] as well as Zintl phases such as NaTe 3. [159] Polonium is a radioactive, soft metal with a hardness similar to lead. [160]
Tellurium is a semiconductor with an electrical conductivity of around 1.0 S•cm −1 [388] and a band gap of 0.32 to 0.38 eV. [389] Liquid tellurium is a semiconductor, with an electrical conductivity, on melting, of around 1.9 × 10 3 S•cm −1. [389] Superheated liquid tellurium is a metallic conductor. [390]