Mercury is the only elemental metal that is liquid at room temperature. ... Mercury is silvery white, slowly tarnishes in moist air, and freezes into a soft solid like tin or lead at −38.87 °C (−37.97 °F). It boils at 356.9 °C (674 °F). Liquid mercury beads and a glass container.

Boiling point: 356.9 °C (674 °F)Melting point: −38.87 °C (−37.97 °F)Specific gravity: 13.5 at 20 °C (68 °F)

Elemental and methyl mercury are toxic to the central and peripheral nervous systems. The inhalation of mercury vapor can produce harmful effects on the nervous, digestive and immune systems, lungs and kidneys, and may be fatal.