Mercury, 80 General properties Pronunciation Template:Infobox element/pronunciation Appearance silvery Standard atomic weight (A r, standard ) Template:Infobox element/standard atomic weight Mass number Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)Mercury in the periodic table Template:Infobox element/periodic table Atomic number (Z ) 80 Group Template:Infobox element/group Period period 6 Block d-block Element category Template:Infobox element/category format , alternatively considered a transition metal Electron configuration [Xe ] 4f14 5d10 6s2 Electrons per shell
2, 8, 18, 32, 18, 2 Physical properties Phase at STP liquid Melting point 234.3210 K (−38.8290 °C, −37.8922 °F) Boiling point 629.88 K (356.73 °C, 674.11 °F) Density (near r.t. ) 13.534 g/cm3 Triple point 234.3156 K, 1.65×10−7 kPa Critical point 1750 K, 172.00 MPa Heat of fusion 2.29 kJ/mol [[Enthalpy of vaporization|Heat of Template:Engvar ]] 59.11 kJ/mol Molar heat capacity 27.983 J/(mol·K) [[Vapor pressure|Template:Engvar pressure Atomic properties Oxidation states Template:Infobox element/symbol-to-oxidation-state Electronegativity Pauling scale: 2.00 [[Ionization energy|Template:Engvar energies]] 1st: 1007.1 kJ/mol 2nd: 1810 kJ/mol 3rd: 3300 kJ/mol Atomic radius empirical: 151 pm Covalent radius 132±5 pm Van der Waals radius 155 pm Template:Infobox element/spectral lines Other properties Crystal structure Template:Infobox element/crystal structure Speed of sound liquid: 1451.4 m/s (at 20 °C) Thermal expansion 60.4 µm/(m·K) (at 25 °C) Thermal conductivity 8.30 W/(m·K) Electrical resistivity 961 nΩ·m (at 25 °C) Magnetic ordering diamagnetic[1] Magnetic susceptibility −33.44·10−6 cm3 /mol (293 K)[2] CAS Number 7439-97-6 History Discovery Ancient Chinese and Indians (before 2000 BCE ) Main isotopes of mercury Template:Infobox element/isotopes table | references
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