Technical data for Copper

Overview Name Copper Symbol Cu Atomic Number 29 Atomic Weight 63.546 Density 8.96 g/cm3 Melting Point 1084.62 °C Boiling Point 2562 °C Thermal properties Phase Solid Melting Point 1084.62 °C Boiling Point 2562 °C Absolute Melting Point 1357.77 K Absolute Boiling Point 2835 K Critical Pressure N/A Critical Temperature N/A Heat of Fusion 13.1 kJ/mol Heat of Vaporization 300 kJ/mol Specific Heat 384.4 J/(kg K)[note] Adiabatic Index N/A Neel Point N/A Thermal Conductivity 400 W/(m K) Thermal Expansion 0.0000165 K-1 Bulk physical properties Density 8.96 g/cm3 Density (Liquid) 8.02 g/cm3 Molar Volume 7.0922×10-6 Brinell Hardness 874 MPa Mohs Hardness 3 Vickers Hardness 369 MPa Bulk Modulus 140 GPa Shear Modulus 48 GPa Young Modulus 130 GPa Poisson Ratio 0.34 Refractive Index N/A Speed of Sound 3570 m/s Thermal Conductivity 400 W/(m K) Thermal Expansion 0.0000165 K-1 Reactivity Valence 2 Electronegativity 1.9 ElectronAffinity 118.4 kJ/mol Ionization Energies 745.5, 1957.9, 3555, 5536, 7700, 9900, 13400, 16000, 19200, 22400, 25600, 35600, 38700, 42000, 46700, 50200, 53700, 61100, 64702, 163700, 174100 kJ/mol Health and Safety DOT Hazard Class 4.1 DOT Numbers 3089 RTECS Number RTECSGL5325000 NFPA Label

Classifications Alternate Names Cuprum Names of Allotropes None Block d Group 11 Period 4 Series Transition Metal Electron Configuration [Ar]4s13d10 Color Copper Discovery 8000 BC Gas phase N/A CAS Number CAS7440-50-8 CID Number CID23978 RTECS Number RTECSGL5325000 Electrical properties Electrical Type Conductor Electrical Conductivity 5.9×107 S/m Resistivity 1.7×10-8 m Ω Superconducting Point N/A Magnetic properties Magnetic Type Diamagnetic Curie Point N/A Mass Magnetic Susceptibility -1.08×10-9 m3/Kg Molar Magnetic Susceptibility -6.86×10-11 m3/mol Volume Magnetic Susceptibility -9.63×10-6 Abundances % in Universe 6×10-6% % in Sun 0.00007% % in Meteorites 0.011% % in Earth's Crust 0.0068% % in Oceans 3×10-7% % in Humans 0.0001% Atomic dimensions and structure Atomic Radius 145 pm Covalent Radius 132 pm Van der Waals Radius 140 pm Crystal Structure Face-centered Cubic Lattice Angles π/2, π/2, π/2 Lattice Constants 361.49, 361.49, 361.49 pm Space Group Name Fm_ 3m Space Group Number 225 Nuclear Properties Half-Life Stable Lifetime Stable Decay Mode N/A Quantum Numbers 2S1/2 Neutron Cross Section 3.78 Neutron Mass Absorption 0.0021 Known Isotopes 52Cu, 53Cu, 54Cu, 55Cu, 56Cu, 57Cu, 58Cu, 59Cu, 60Cu, 61Cu, 62Cu, 63Cu, 64Cu, 65Cu, 66Cu, 67Cu, 68Cu, 69Cu, 70Cu, 71Cu, 72Cu, 73Cu, 74Cu, 75Cu, 76Cu, 77Cu, 78Cu, 79Cu, 80Cu Stable Isotopes 63Cu, 65Cu Isotopic Abundances 63Cu 69.17% 65Cu 30.83%