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  2. Arsenic - Wikipedia

    en.wikipedia.org/wiki/Arsenic

    Arsenic is a chemical element with the symbol As and the ... bacteria were discovered that employ a version of photosynthesis in the absence of oxygen with ...

  3. Marsh test - Wikipedia

    en.wikipedia.org/wiki/Marsh_test

    Any arsenic present would appear as arsenic trioxide and then could be subjected to Metzger's test. The most common test (and used even today in water test kits) was discovered by Samuel Hahnemann. It would involve combining a sample fluid with hydrogen sulfide (H 2 S) in the presence of hydrochloric acid (HCl).

  4. Discovery of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Discovery_of_chemical_elements

    Perey discovered it as a decay product of 227 Ac. [177] Francium was the last element to be discovered in nature, rather than synthesized in the lab, although four of the "synthetic" elements that were discovered later (plutonium, neptunium, astatine, and promethium) were eventually found in trace amounts in nature as well. [178]

  5. James Marsh (chemist) - Wikipedia

    en.wikipedia.org/wiki/James_Marsh_(chemist)

    James Marsh (2 September 1794 – 21 June 1846) was a British chemist who invented the Marsh test for detecting arsenic.Born in Kent, he was working as a labourer in Woolwich in the late 1810s and early 1820s, before joining the Royal Artillery. [1]

  6. Arsenic poisoning - Wikipedia

    en.wikipedia.org/wiki/Arsenic_poisoning

    Arsenic was known to be poisonous during the Victorian era. [103] Beginning in about 3000 BC arsenic was mined and added to copper in the alloying of bronze, but the adverse health effects of working with arsenic led to it being abandoned when a viable alternative, tin, was discovered. [104]

  7. Arsenic biochemistry - Wikipedia

    en.wikipedia.org/wiki/Arsenic_biochemistry

    Arsenic biochemistry is the set of biochemical processes that can use arsenic or its compounds, ... discovered by Paul Ehrlich. [21] The treatment, however, ...

  8. Joe Rogan Says He Gave Himself Arsenic Poisoning From ... - AOL

    www.aol.com/lifestyle/joe-rogan-says-gave...

    Joe Rogan once feared that somebody was trying to poison him after he got bloodwork done and low levels of arsenic were detected—but it turned out something fishy was going on.. During a recent ...

  9. Metals of antiquity - Wikipedia

    en.wikipedia.org/wiki/Metals_of_antiquity

    The earliest gold artifacts were discovered at the site of Wadi Qana in the Levant. [13] Silver is estimated to have been discovered in Asia Minor shortly after copper and gold. [14] There is evidence that iron was known from before 5000 BC. [15] The oldest known iron objects used by humans are some beads of meteoric iron, made in Egypt in ...