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Mercury (Hg) is a silvery white metal also known as quicksilver. Mercury is named for the Roman god of commerce, travel and thievery. It has been used for over 3000 years. Its chemical symbol, Hg, is derived from the Latin word hydrargyrum, which means "liquid silver.



Copper (Cu) is a malleable, ductile, reddish metal that melts at 1083°C. Copper has both a high electric and thermal conductivity. Only silver is a better thermal and electrical conductor.



Uranium oxide was first identified in 1789 by M.H. Klaproth in the MINERAL pitchblende, but its distinctive property of radioactivity was discovered much later (1896) by Henri Becquerel.


Asbestos (Mineral)

The name asbestos comes from a Greek word meaning "inextinguishable" (often mistaken to mean "incombustible"). Asbestos is a collective term that is used to designate 2 separate groups of silicates: the serpentine group and the amphibole group.