Mercury, also known as quick silver or hydrargyrum, is a chemical element with the atomic number 80 and atomic symbol Hg. It's melting point is about -38.83ºC, and a boiling point of 356.73ºC. It is one of 2 known elements which are, in their natural state, a liquid, the other being bromine or, Br. Mercury boils at 674.11°F and melts at -37.89°F. Its Standard Atomic Mass is 200.59 and is naturally found in the liquid state. Mercury ore is known as Cinnabar.