The chemical symbol for the element Mercury is Hg. This symbol is derived from the Latin word "hydrargyrum," which means "liquid silver." Mercury is unique among metals as it is liquid at room temperature, and it has various applications, including in thermometers, barometers, and dental amalgams. Despite its utility, mercury is highly toxic and poses significant health risks, including neurological damage and impairment of kidney function, if not handled properly. Due to these dangers, many jurisdictions have begun phasing out the use of mercury in consumer products in favor of safer alternatives.