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  2. Tungsten - Wikipedia

    en.wikipedia.org/wiki/Tungsten

    Tungsten is a mostly non-reactive element: it does not react with water, is immune to attack by most acids and bases, and does not react with oxygen or air at room temperature. At elevated temperatures (i.e., when red-hot) it reacts with oxygen to form the trioxide compound tungsten(VI), WO 3 .

  3. Sulfur cycle - Wikipedia

    en.wikipedia.org/wiki/Sulfur_cycle

    Sulfur can be found under several oxidation states in nature, mainly −2, −1, 0, +2 (apparent), +2.5 (apparent), +4, and +6. When two sulfur atoms are present in the same polyatomic oxyanion in an asymmetrical situation, i.e, each bound to different groups as in thiosulfate, the oxidation state calculated from the known oxidation state of accompanying atoms (H = +1, and O = −2) can be an ...

  4. Tungsten trioxide - Wikipedia

    en.wikipedia.org/wiki/Tungsten_trioxide

    Tungsten trioxide is a starting material for the synthesis of tungstates. Barium tungstate BaWO 4 is used as a x-ray screen phosphors . Alkali metal tungstates, such as lithium tungstate Li 2 WO 4 and cesium tungstate Cs 2 WO 4 , give dense solutions that can be used to separate minerals. [ 1 ]

  5. Electrical resistivities of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Electrical_resistivities_of...

    16 S sulfur; use (amorphous) 2×10 15 Ωm ... (room temperature) (alpha, polycrystalline) calculated from single crystal values 56.2 ... 74 W tungsten; use 6.06 nΩm ...

  6. Vapor pressures of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Vapor_pressures_of_the...

    Values are given in terms of temperature necessary to reach the specified pressure. Valid results within the quoted ranges from most equations are included in the table for comparison. A conversion factor is included into the original first coefficients of the equations to provide the pressure in pascals (CR2: 5.006, SMI: -0.875).

  7. Tungsten disulfide - Wikipedia

    en.wikipedia.org/wiki/Tungsten_disulfide

    Tungsten disulfide is an inorganic chemical compound composed of tungsten and sulfur with the chemical formula WS 2. This compound is part of the group of materials called the transition metal dichalcogenides .

  8. Tetrakis(trimethylphosphine)tungsten(II) trimethylphospinate ...

    en.wikipedia.org/wiki/Tetrakis(trimethylphosphi...

    W(PMe 3) 4 (η 2-CH 2 PMe 2)H was first synthesized in 1983 by reacting tungsten hexachloride with trimethylphosphine and sodium under a nitrogen atmosphere. [6] The complex was also a very minor product synthesized as a part of a reaction aimed at generating cyclopentadienyl- and PMe 3-containing tungsten complexes by co-condensing tungsten atoms, PMe 3, and cyclopentene at −196 °C. [7]

  9. Table of specific heat capacities - Wikipedia

    en.wikipedia.org/wiki/Table_of_specific_heat...

    A Assuming an altitude of 194 metres above mean sea level (the worldwide median altitude of human habitation), an indoor temperature of 23 °C, a dewpoint of 9 °C (40.85% relative humidity), and 760 mmHg sea level–corrected barometric pressure (molar water vapor content = 1.16%). B Calculated values *Derived data by calculation.