Technical data for Mercury

Overview Name Mercury Symbol Hg Atomic Number 80 Atomic Weight 200.592 Density 13.534 g/cm3 Melting Point -38.83 °C Boiling Point 356.73 °C Thermal properties Phase Liquid Melting Point -38.83 °C Boiling Point 356.73 °C Absolute Melting Point 234.32 K Absolute Boiling Point 629.88 K Critical Pressure 172 MPa (1698 Atm) Critical Temperature 1750 K Heat of Fusion 2.29 kJ/mol Heat of Vaporization 59.2 kJ/mol Specific Heat 139.5 J/(kg K)[note] Adiabatic Index N/A Neel Point N/A Thermal Conductivity 8.3 W/(m K) Thermal Expansion 0.000181 K-1 Bulk physical properties Density 13.534 g/cm3 Density (Liquid) 13.534 g/cm3[note] Molar Volume 0.0000148213 Brinell Hardness N/A Mohs Hardness N/A Vickers Hardness N/A Bulk Modulus 25 GPa Shear Modulus N/A Young Modulus N/A Poisson Ratio N/A Refractive Index 1.000933 Speed of Sound 1407 m/s Thermal Conductivity 8.3 W/(m K) Thermal Expansion 0.000181 K-1 Reactivity Valence 2 Electronegativity 2 ElectronAffinity 0 kJ/mol Ionization Energies 1007.1, 1810, 3300 kJ/mol Health and Safety DOT Hazard Class 8 DOT Numbers 2809 RTECS Number RTECSOV4550000 NFPA Label

Classifications Alternate Names Hydrargyrum Names of Allotropes None Block d Group 12 Period 6 Series Transition Metal Electron Configuration [Xe]6s24f145d10 Color Silver Discovery 1500 BC Gas phase N/A CAS Number CAS7439-97-6 CID Number CID23931 RTECS Number RTECSOV4550000 Electrical properties Electrical Type Conductor Electrical Conductivity 1×106 S/m Resistivity 9.6×10-7 m Ω Superconducting Point 4.154 Magnetic properties Magnetic Type Diamagnetic Curie Point N/A Mass Magnetic Susceptibility -2.1×10-9 m3/Kg Molar Magnetic Susceptibility -4.21×10-10 m3/mol Volume Magnetic Susceptibility -0.0000284 Abundances % in Universe 1×10-7% % in Sun 2×10-6% % in Meteorites 0.000025% % in Earth's Crust 6.7×10-6% % in Oceans 5×10-9% % in Humans N/A Atomic dimensions and structure Atomic Radius 171 pm Covalent Radius 132 pm Van der Waals Radius 155 pm Crystal Structure Simple Trigonal Lattice Angles 1.23081, 1.23081, 1.23081 Lattice Constants 300.5, 300.5, 300.5 pm Space Group Name R_ 3m Space Group Number 166 Nuclear Properties Half-Life Stable Lifetime Stable Decay Mode N/A Quantum Numbers 1S0 Neutron Cross Section 374 Neutron Mass Absorption 0.063 Known Isotopes 171Hg, 172Hg, 173Hg, 174Hg, 175Hg, 176Hg, 177Hg, 178Hg, 179Hg, 180Hg, 181Hg, 182Hg, 183Hg, 184Hg, 185Hg, 186Hg, 187Hg, 188Hg, 189Hg, 190Hg, 191Hg, 192Hg, 193Hg, 194Hg, 195Hg, 196Hg, 197Hg, 198Hg, 199Hg, 200Hg, 201Hg, 202Hg, 203Hg, 204Hg, 205Hg, 206Hg, 207Hg, 208Hg, 209Hg, 210Hg Stable Isotopes 196Hg, 198Hg, 199Hg, 200Hg, 201Hg, 202Hg, 204Hg Isotopic Abundances 196Hg 0.15% 198Hg 9.97% 199Hg 16.87% 200Hg 23.1% 201Hg 13.18% 202Hg 29.86% 204Hg 6.87%