Mercury (element)
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Mercury (element) is a chemical element, having the chemical symbol Hg.
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Its atomic number (the number of protons) is 80. It has a Standard Atomic Weight of 200.59(2), and is typically found as a liquid in its elemental form.
Mercury (element) is considered to be a member of the "Transition metal" class of elements, has a boiling point of 356.73 °C, and a melting point of −38.83 °C.