Technical data for Bromine

Overview Name Bromine Symbol Br Atomic Number 35 Atomic Weight 79.904 Density 3.12 g/cc Melting Point -7.3°C Boiling Point 59.°C Thermal properties Phase Liquid Melting Point -7.3°C Boiling Point 59.°C Absolute Melting Point 265.8K Absolute Boiling Point 332.K Critical Pressure 10.34MPa (102.Atm) Critical Temperature 588.K Heat of Fusion 5.8KJ/mol Heat of Vaporization 14.8KJ/mol Heat of Combustion N/A Specific Heat 947.3J/(Kg K)[note] Adiabatic Index N/A Neel Point N/A Thermal Conductivity 0.12W/(m K) Thermal Expansion N/A Bulk physical properties Density 3.12 g/cc Density (Liquid) 3.12 g/cc[note] Molar Volume 0.00002561 Brinell Hardness N/A Mohs Hardness N/A Vickers Hardness N/A Bulk Modulus 1.9GPa Shear Modulus N/A Young Modulus N/A Poisson Ratio N/A Refractive Index 1.001132 Speed of Sound N/A Thermal Conductivity 0.12W/(m K) Thermal Expansion N/A Reactivity Valence 7 Electronegativity 2.96 ElectronAffinity 324.6KJ/mol Ionization Energies 1139.9, 2103., 3470., 4560., 5760., 8550., 9940., 1.86×104 KJ/mol Health and Safety Autoignition Point N/A Flashpoint -18.°C Heat of Combustion N/A DOT Hazard Class 8 DOT Numbers 1744 EU Number EU231-778-1 NFPA Fire Rating 0 NFPA Hazards Oxidizing Agent NFPA Health Rating 3 NFPA Reactivity Rating 0 RTECS Classes Human Data RTECS Number RTECSEF9100000 NFPA Label

Classifications Alternate Names None Names of Allotropes Dibromine Block p Group 17 Period 4 Electron Configuration [Ar]3d104s24p5 Color Red Discovery 1826 in France Gas phase N/A CAS Number CAS7726-95-6 CID Number CID24408 Gmelin Number Gmelin1182 NSC Number N/A RTECS Number RTECSEF9100000 Electrical properties Electrical Type Insulator Electrical Conductivity 1.×10-10S/m Resistivity 1.×1010m Ω Superconducting Point N/A Magnetic properties Magnetic Type Diamagnetic Curie Point N/A Mass Magnetic Susceptibility -4.9×10-9 Molar Magnetic Susceptibility -3.92×10-10 Volume Magnetic Susceptibility -0.0000153 Abundances % in Universe 7.×10-7% % in Sun N/A % in Meteorites 0.00012% % in Earth's Crust 0.0003% % in Oceans 0.0067% % in Humans 0.00029% Atomic dimensions and structure Atomic Radius 94.pm Covalent Radius 114.pm Van der Waals Radius 185.pm Crystal Structure Base Centered Orthorhombic Lattice Angles π/2, π/2, π/2 Lattice Constants 672.65, 464.51, 870.23 pm Space Group Name Cmca Space Group Number 64 Nuclear Properties Half-Life Stable Lifetime Stable Decay Mode N/A Quantum Numbers 2P3/2 Neutron Cross Section 6.8 Neutron Mass Absorption 0.002 Known Isotopes 67Br, 68Br, 69Br, 70Br, 71Br, 72Br, 73Br, 74Br, 75Br, 76Br, 77Br, 78Br, 79Br, 80Br, 81Br, 82Br, 83Br, 84Br, 85Br, 86Br, 87Br, 88Br, 89Br, 90Br, 91Br, 92Br, 93Br, 94Br, 95Br, 96Br, 97Br Stable Isotopes 79Br, 81Br Isotopic Abundances 79Br 50.69% 81Br 49.31%