Hg. Mercury in its elemental (pure) form,
that is, as a metal; hence the synonym metallic mercury. A shiny, silver-gray
metal that is a liquid at room temperature.
Source: GreenFacts
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Elemental mercury has many uses and is for instance found in thermometers,
barometers, dental amalgams, batteries, fluorescent lights and some electrical
switches. It is rarely found in nature.
