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  2. Tantalum - Wikipedia

    en.wikipedia.org/wiki/Tantalum

    Tantalum was discovered in Sweden in 1802 by Anders Ekeberg, in two mineral samples – one from Sweden and the other from Finland. [15] [16] One year earlier, Charles Hatchett had discovered columbium (now niobium). [17] In 1809, the English chemist William Hyde Wollaston compared the oxides of columbium and tantalum, columbite and tantalite.

  3. 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.

  4. Group 5 element - Wikipedia

    en.wikipedia.org/wiki/Group_5_element

    There are 2 parts per million of tantalum in the Earth's crust, making it the 51st most abundant element there. Soil contains on average 1 to 2 parts per billion of tantalum, and seawater contains 2 parts per trillion of tantalum. A typical human contains 2.9 parts per billion of tantalum. Tantalum is found in the minerals tantalite and ...

  5. Native metal - Wikipedia

    en.wikipedia.org/wiki/Native_metal

    Elsewhere in this region native indium, aluminium, tantalum, tellurium, and other metals have been reported. [citation needed] Native lead [17] is quite rare but somewhat more widespread, as are tin, [18] mercury, [19] arsenic, [20] antimony, [21] and bismuth. [22] Native chromium has been found in small grains in Sichuan, China [23] and other ...

  6. Rwanda-backed rebels seize key town in DR Congo - AOL

    www.aol.com/rwanda-backed-rebels-seize-key...

    However, Rwanda's critics accuse it of using the M23 to loot eastern DR Congo's minerals such as gold, cobalt and tantalum, which are used to make mobile phones and batteries for electric cars.

  7. 47 Hobbies for Couples Looking to Connect and Have Fun - AOL

    www.aol.com/47-hobbies-couples-looking-connect...

    Mitja Kobal/GETTY IMAGES. 2. Go Stargazing. Astronomy is one of the most fascinating and magical subjects, and stargazing is an undeniably romantic hobby and a good place to start if you and your ...

  8. Coltan mining and ethics - Wikipedia

    en.wikipedia.org/wiki/Coltan_mining_and_ethics

    Coltan is the colloquial name for the mineral columbite-tantalum ("col-tan"). In the early 21st century coltan mining is associated with human rights violations such as child labour, systematic exploitation of the population by governments or militant groups, exposure to toxic chemicals and other hazards as a result of lax environmental protection, and general safety laws and regulations. [1]

  9. “Timestamped Pictures”: 50 Random Things People Did That ...

    www.aol.com/55-things-people-did-just-020043615.html

    Image credits: debdeman #6. Not me but my mother. My mom bought the travel insurance on her Disneyworld trip because she is bipolar and thought if she had a bad day they would get a refund.