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  2. Tantalum - Wikipedia

    en.wikipedia.org/wiki/Tantalum

    Tantalum is a chemical element; it has symbol Ta and atomic number 73. It is named after Tantalus, a figure in Greek mythology. [11] Tantalum is a very hard, ductile, lustrous, blue-gray transition metal that is highly corrosion-resistant. It is part of the refractory metals group, which are widely used as components of strong high-melting ...

  3. Coltan - Wikipedia

    en.wikipedia.org/wiki/Coltan

    The niobium-dominant mineral in coltan is columbite (after niobium's original American name columbium), and the tantalum-dominant mineral is tantalite. [1] Tantalum from coltan is used to manufacture tantalum capacitors which are used for mobile phones, personal computers, automotive electronics, and cameras. [2]

  4. Uber sues DoorDash, accusing its food delivery rival of ... - AOL

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    "Restaurants simply cannot afford to stand up to DoorDash, and find themselves powerless to choose the service or services that are best for their businesses in the market for first-party delivery ...

  5. Tantalite - Wikipedia

    en.wikipedia.org/wiki/Tantalite

    The mineral group tantalite [(Fe, Mn)Ta 2 O 6] is the primary source of the chemical element tantalum, a corrosion (heat and acid) resistant metal.It is chemically similar to columbite, and the two are often grouped together as a semi-singular mineral called coltan or "columbite-tantalite" in many mineral guides.

  6. ‘Elevated Levels’ of Heavy Metals Found in Popular Protein ...

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    Here's what a food safety expert wants you to know. Meet the expert: Felicia Wu, PhD, is a professor of food safety, toxicology, and risk assessment at Michigan State University.

  7. Tantalum (V) chloride - Wikipedia

    en.wikipedia.org/wiki/Tantalum(V)_chloride

    2 Ta + 5 Cl 2 → 2 TaCl 5 2 Ta + 10 HCl → 2 TaCl 5 + 5 H 2. It can also be prepared by a reaction between tantalum pentoxide and thionyl chloride at 240 °C Ta 2 O 5 + 5 SOCl 2 → 2 TaCl 5 + 5 SO 2. Tantalum pentachloride is commercially available, however samples can be contaminated with tantalum(V) oxychloride (TaOCl 3), formed by hydrolysis.

  8. Restaurants grapple with virtual 'dine and dash' amid the ...

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    The scams have been on the rise as more restaurants offer online takeout and delivery payment options. Skip to main content. News. 24/7 help. For premium support please call: ...

  9. Tantalum hafnium carbide - Wikipedia

    en.wikipedia.org/wiki/Tantalum_hafnium_carbide

    Tantalum hafnium carbide is a refractory chemical compound with a general formula Ta x Hf y C x+y, which can be considered as a solid solution of tantalum carbide and hafnium carbide. It was originally thought to have the highest melting of any known substance but new research has proven that hafnium carbonitride has a higher melting point.

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