Mercury (Hg)

Mercury (Hg)

Atomic Number: 80
Atomic Weight: 200.59
Melting Point: -38.87
Boiling Point: 356.58
Specific Gravity: 13.55
Valence(s): 1 or 2

Mercury was known to the ancients of the Far East. It is liquid at room temperature. Cinnabar is the main source of Mercury. Mercury is used to make thermometers, barometers, and other instruments. Production of dental preparations and batteries can involve using mercury. Mercury is poisonous and must be handled with care. [LM] {RW}