Technical data for Lead

Overview Name Lead Symbol Pb Atomic Number 82 Atomic Weight 207.2 Density 11.34 g/cm3 Melting Point 327.46 °C Boiling Point 1749 °C Thermal properties Phase Solid Melting Point 327.46 °C Boiling Point 1749 °C Absolute Melting Point 600.61 K Absolute Boiling Point 2022 K Critical Pressure N/A Critical Temperature N/A Heat of Fusion 4.77 kJ/mol Heat of Vaporization 178 kJ/mol Specific Heat 127 J/(kg K)[note] Adiabatic Index N/A Neel Point N/A Thermal Conductivity 35 W/(m K) Thermal Expansion 0.0000289 K-1 Bulk physical properties Density 11.34 g/cm3 Density (Liquid) 10.66 g/cm3 Molar Volume 0.000018272 Brinell Hardness 38.3 MPa Mohs Hardness 1.5 Vickers Hardness N/A Bulk Modulus 46 GPa Shear Modulus 5.6 GPa Young Modulus 16 GPa Poisson Ratio 0.44 Refractive Index N/A Speed of Sound 1260 m/s Thermal Conductivity 35 W/(m K) Thermal Expansion 0.0000289 K-1 Reactivity Valence 4 Electronegativity 2.33 ElectronAffinity 35.1 kJ/mol Ionization Energies 715.6, 1450.5, 3081.5, 4083, 6640 kJ/mol Health and Safety DOT Hazard Class N/A DOT Numbers 3077 RTECS Number RTECSOF7525000 NFPA Label

Classifications Alternate Names Plumbum Names of Allotropes None Block p Group 14 Period 6 Series Poor Metal Electron Configuration [Xe]6s24f145d106p2 Color SlateGray Discovery 4000 BC Gas phase N/A CAS Number CAS7439-92-1 CID Number CID5352425 RTECS Number RTECSOF7525000 Electrical properties Electrical Type Conductor Electrical Conductivity 4.8×106 S/m Resistivity 2.1×10-7 m Ω Superconducting Point 7.2 Magnetic properties Magnetic Type Diamagnetic Curie Point N/A Mass Magnetic Susceptibility -1.5×10-9 m3/Kg Molar Magnetic Susceptibility -3.11×10-10 m3/mol Volume Magnetic Susceptibility -0.000017 Abundances % in Universe 1×10-6% % in Sun 9.9×10-7% % in Meteorites 0.00014% % in Earth's Crust 0.001% % in Oceans 3×10-9% % in Humans 0.00017% Atomic dimensions and structure Atomic Radius 154 pm Covalent Radius 146 pm Van der Waals Radius 202 pm Crystal Structure Face-centered Cubic Lattice Angles π/2, π/2, π/2 Lattice Constants 495.08, 495.08, 495.08 pm Space Group Name Fm_ 3m Space Group Number 225 Nuclear Properties Half-Life Stable Lifetime Stable Decay Mode N/A Quantum Numbers 3P0 Neutron Cross Section 0.171 Neutron Mass Absorption 0.00003 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 204Pb 1.4% 206Pb 24.1% 207Pb 22.1% 208Pb 52.4%