Mercury (element)

Mercury 200.59(2)   Hg 80 1s22s22p63s23p63d104s24p6 4d105s25p64f145d106s2 12,6,d [ ? ] Transition metal: Properties: Liquid at room temperature Uses: Thermometers Hazard: Toxic

Mercury is a chemical element, having the chemical symbol Hg. Its atomic number (the number of protons) is 80. It has a standard atomic weight of 200.59 g•mol ⁻¹ and is a liquid in its elemental form at room temperature.

Platinum is considered a member of the "Transition metal" class of elements. At a pressure of 101.325 kPa, it has a boiling point of 356.73 °C and a melting point of −38.83 °C.