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Tellurium is a chemical element; it has symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens. It is occasionally found in its native form as elemental crystals.
Tellurium is one of the eight or nine least abundant elements in the Earth's crust. [7] There are a few dozen tellurate minerals and telluride minerals, and tellurium occurs in some minerals with gold, such as sylvanite and calaverite. [59] Tellurium makes up 9 parts per billion of the universe by weight. [7] [57] [60]
However, the lack of tellurium compounds in the Falun Mine minerals eventually led Berzelius to reanalyze the red precipitate, and in 1818 he wrote a second letter to Marcet describing a newly found element similar to sulfur and tellurium. Because of its similarity to tellurium, named for the Earth, Berzelius named the new element after the Moon.
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 shows fewer tendencies to anionic behaviour than ordinary nonmetals. [293] Its solution chemistry is characterised by the formation of oxyanions. [294] Tellurium generally forms compounds in which it has an oxidation state of −2, +4 or +6. The +4 state is the most stable. [381]
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Minerals containing the chemical element tellurium Note (New Dana Classification): Telluride minerals are in the category: Sulfides and Sulfosalts (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.) too
U.S. Homeland Security Secretary Kristi Noem plans to visit a migrant detention site in Guantanamo Bay, Cuba, as the Trump administration ramps up enforcement efforts, a department spokesperson ...