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Technical data for Mercury

Click any property name to see plots of that property for all the elements.

Overview
NameMercury
SymbolHg
Atomic Number80
Atomic Weight200.59
Density13.534 g/cm3
Melting Point-38.83 °C
Boiling Point356.73 °C

Thermal properties
PhaseLiquid
Melting Point-38.83 °C
Boiling Point356.73 °C
Absolute Melting Point234.32 K
Absolute Boiling Point629.88 K
Critical Pressure172 MPa (1698 Atm)
Critical Temperature1750 K
Heat of Fusion2.29 kJ/mol
Heat of Vaporization59.2 kJ/mol
Heat of CombustionN/A
Specific Heat139.5 J/(kg K)[note]
Adiabatic IndexN/A
Neel PointN/A
Thermal Conductivity8.3 W/(m K)
Thermal ExpansionN/A

Bulk physical properties
Density13.534 g/cm3
Density (Liquid)13.534 g/cm3[note]
Molar Volume0.0000148212
Brinell HardnessN/A
Mohs HardnessN/A
Vickers HardnessN/A
Bulk Modulus25 GPa
Shear ModulusN/A
Young ModulusN/A
Poisson RatioN/A
Refractive Index1.000933
Speed of Sound1407 m/s
Thermal Conductivity8.3 W/(m K)
Thermal ExpansionN/A

Reactivity
Valence2
Electronegativity2
ElectronAffinity0 kJ/mol
Ionization Energies
1007.1, 1810, 3.3×103 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A
Heat of CombustionN/A
DOT Hazard Class8
DOT Numbers2809
EU NumberN/A
NFPA Fire Rating0
NFPA HazardsN/A
NFPA Health Rating3
NFPA Reactivity Rating0
RTECS NumberRTECSOV4550000
NFPA LabelNFPA Label

Classifications
Alternate NamesHydrargyrum
Names of AllotropesNone
Blockd
Group12
Period6
Electron Configuration[Xe]4f145d106s2
ColorSilver
Discovery
1500 BC
Gas phaseN/A
CAS NumberCAS7439-97-6
CID NumberCID23931
Gmelin NumberN/A
NSC NumberN/A
RTECS NumberRTECSOV4550000

Electrical properties
Electrical TypeConductor
Electrical Conductivity1×106 S/m
Resistivity9.6×10-7 m Ω
Superconducting Point4.154

Magnetic properties
Magnetic TypeDiamagnetic
Curie PointN/A
Mass Magnetic Susceptibility-2.1×10-9
Molar Magnetic Susceptibility-4.21×10-10
Volume Magnetic Susceptibility-0.0000284

Abundances
% in Universe1×10-7%
% in Sun2×10-6%
% in Meteorites0.000025%
% in Earth's Crust6.7×10-6%
% in Oceans5×10-9%
% in HumansN/A

Atomic dimensions and structure
Atomic Radius171 pm
Covalent Radius149 pm
Van der Waals Radius155 pm
Crystal StructureSimple Trigonal
Lattice Angles
1.23081, 1.23081, 1.23081
Lattice Constants
300.5, 300.5, 300.5 pm
Space Group NameR_ 3m
Space Group Number166

Nuclear Properties
Half-LifeStable
LifetimeStable
Decay ModeN/A
Quantum Numbers1S0
Neutron Cross Section374
Neutron Mass Absorption0.063
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
196Hg0.15%
198Hg9.97%
199Hg16.87%
200Hg23.1%
201Hg13.18%
202Hg29.86%
204Hg6.87%


Notes on the properties of Mercury:

Liquid Density: Value given at STP.

Specific Heat: Value given for liquid phase.

Up to date, curated data provided by
Mathematica's ElementData function from Wolfram Research, Inc.

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