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Technical data for Lead

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Overview
NameLead
SymbolPb
Atomic Number82
Atomic Weight207.2
Density11.34 g/cm3
Melting Point327.46 °C
Boiling Point1749 °C

Thermal properties
PhaseSolid
Melting Point327.46 °C
Boiling Point1749 °C
Absolute Melting Point600.61 K
Absolute Boiling Point2022 K
Critical PressureN/A
Critical TemperatureN/A
Heat of Fusion4.77 kJ/mol
Heat of Vaporization178 kJ/mol
Heat of CombustionN/A
Specific Heat127 J/(kg K)[note]
Adiabatic IndexN/A
Neel PointN/A
Thermal Conductivity35 W/(m K)
Thermal Expansion0.0000289 K-1

Bulk physical properties
Density11.34 g/cm3
Density (Liquid)10.66 g/cm3
Molar Volume0.000018272
Brinell Hardness38.3 MPa
Mohs Hardness1.5 MPa
Vickers HardnessN/A
Bulk Modulus46 GPa
Shear Modulus5.6 GPa
Young Modulus16 GPa
Poisson Ratio0.44
Refractive IndexN/A
Speed of Sound1260 m/s
Thermal Conductivity35 W/(m K)
Thermal Expansion0.0000289 K-1

Reactivity
Valence4
Electronegativity2.33
ElectronAffinity35.1 kJ/mol
Ionization Energies
715.6, 1450.5, 3081.5, 4083, 6640 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A
Heat of CombustionN/A
DOT Hazard ClassN/A
DOT Numbers3077
EU NumberN/A
NFPA Fire Rating0
NFPA HazardsN/A
NFPA Health Rating2
NFPA Reactivity Rating0
RTECS NumberRTECSOF7525000
NFPA LabelNFPA Label

Classifications
Alternate NamesPlumbum
Names of AllotropesNone
Blockp
Group14
Period6
Electron Configuration[Xe]4f145d106s26p2
ColorSlateGray
Discovery
4000 BC
Gas phaseN/A
CAS NumberCAS7439-92-1
CID NumberCID5352425
Gmelin NumberN/A
NSC NumberN/A
RTECS NumberRTECSOF7525000

Electrical properties
Electrical TypeConductor
Electrical Conductivity4.8×106 S/m
Resistivity2.1×10-7 m Ω
Superconducting Point7.2

Magnetic properties
Magnetic TypeDiamagnetic
Curie PointN/A
Mass Magnetic Susceptibility-1.5×10-9
Molar Magnetic Susceptibility-3.11×10-10
Volume Magnetic Susceptibility-0.000017

Abundances
% in Universe1×10-6%
% in Sun1×10-6%
% in Meteorites0.00014%
% in Earth's Crust0.00099%
% in Oceans3×10-9%
% in Humans0.00017%

Atomic dimensions and structure
Atomic Radius154 pm
Covalent Radius147 pm
Van der Waals Radius202 pm
Crystal StructureFace Centered Cubic
Lattice Angles
π/2, π/2, π/2
Lattice Constants
495.08, 495.08, 495.08 pm
Space Group NameFm_ 3m
Space Group Number225

Nuclear Properties
Half-LifeStable
LifetimeStable
Decay ModeN/A
Quantum Numbers3P0
Neutron Cross Section0.171
Neutron Mass Absorption0.00003
Known Isotopes
178Pb, 179Pb, 180Pb, 181Pb, 182Pb, 183Pb, 184Pb, 185Pb, 186Pb, 187Pb, 188Pb, 189Pb, 190Pb, 191Pb, 192Pb, 193Pb, 194Pb, 195Pb, 196Pb, 197Pb, 198Pb, 199Pb, 200Pb, 201Pb, 202Pb, 203Pb, 204Pb, 205Pb, 206Pb, 207Pb, 208Pb, 209Pb, 210Pb, 211Pb, 212Pb, 213Pb, 214Pb, 215Pb
Stable Isotopes
204Pb, 206Pb, 207Pb, 208Pb
Isotopic Abundances
204Pb1.4%
206Pb24.1%
207Pb22.1%
208Pb52.4%


Notes on the properties of Lead:

Specific Heat: Value given for solid phase.

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

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