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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. Organotantalum chemistry - Wikipedia

    en.wikipedia.org/wiki/Organotantalum_chemistry

    Tantalum-Carbon Bond. Organotantalum chemistry is the chemistry of chemical compounds containing a carbon-to-tantalum chemical bond. A wide variety of compound have been reported, initially with cyclopentadienyl and CO ligands. Oxidation states vary from Ta(V) to Ta(-I).

  4. 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.

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

    www.aol.com/scientists-just-found-lead-cadmium...

    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.

  6. Coltan - Wikipedia

    en.wikipedia.org/wiki/Coltan

    A piece of columbite–tantalite, size 6.0 × 2.5 × 2.1 cm. Coltan (short for columbite–tantalites and known industrially as tantalite) is a dull black metallic ore from which the elements niobium and tantalum are extracted.

  7. Virtual restaurant - Wikipedia

    en.wikipedia.org/wiki/Virtual_restaurant

    Virtual restaurants rely on their own delivery drivers or third-party delivery apps such as Grubhub, Uber Eats, Postmates and DoorDash to deliver food to customers. [ 2 ] [ 3 ] [ 14 ] A typical virtual restaurant location is able to accommodate the preparation of several different types of cuisines.

  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 (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.

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