Technical data for Lead

Overview Name Lead Symbol Pb Atomic Number 82 Atomic Weight 207.2 Density 11.34 g/cc 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 600.61K Absolute Boiling Point 2022.K Critical Pressure N/A Critical Temperature N/A Heat of Fusion 4.77KJ/mol Heat of Vaporization 178.KJ/mol Heat of Combustion N/A Specific Heat 127.J/(Kg K)[note] Adiabatic Index N/A Neel Point N/A Thermal Conductivity 35.W/(m K) Thermal Expansion 0.0000289K-1 Bulk physical properties Density 11.34 g/cc Density (Liquid) 10.66 g/cc Molar Volume 0.000018272 Brinell Hardness 38.3MPa Mohs Hardness 1.5MPa Vickers Hardness N/A Bulk Modulus 46.GPa Shear Modulus 5.6GPa 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 0.0000289K-1 Reactivity Valence 4 Electronegativity 2.33 ElectronAffinity 35.1KJ/mol Ionization Energies 715.6, 1450.5, 3081.5, 4083., 6640. KJ/mol Health and Safety Autoignition Point N/A Flashpoint N/A Heat of Combustion N/A DOT Hazard Class N/A DOT Numbers 3077 EU Number EU231-100-4 NFPA Fire Rating 0 NFPA Hazards N/A NFPA Health Rating 2 NFPA Reactivity Rating 0 RTECS Classes Tumorigen, Mutagen, Reproductive Effector, Human Data RTECS Number RTECSOF7525000 NFPA Label

Classifications Alternate Names Plumbum Names of Allotropes None Block p Group 14 Period 6 Electron Configuration [Xe]4f145d106s26p2 Color SlateGray Discovery 4000BC Gas phase N/A CAS Number CAS7439-92-1 CID Number CID73212 Gmelin Number Gmelin16240 NSC Number N/A RTECS Number RTECSOF7525000 Electrical properties Electrical Type Conductor Electrical Conductivity 4.8×106S/m Resistivity 2.1×10-7m Ω Superconducting Point 7.2 Magnetic properties Magnetic Type Diamagnetic Curie Point N/A Mass Magnetic Susceptibility -1.5×10-9 Molar Magnetic Susceptibility -3.11×10-10 Volume Magnetic Susceptibility -0.000017 Abundances % in Universe 1.×10-6% % in Sun 1.×10-6% % in Meteorites 0.00014% % in Earth's Crust 0.00099% % in Oceans 3.×10-9% % in Humans 0.00017% Atomic dimensions and structure Atomic Radius 154.pm Covalent Radius 147.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%