Technical data for Bromine

Overview
NameBromine
SymbolBr
Atomic Number35
Atomic Weight79.904
Density3.12 g/cm3
Melting Point-7.3 °C
Boiling Point59 °C

Thermal properties
PhaseLiquid
Melting Point-7.3 °C
Boiling Point59 °C
Absolute Melting Point265.8 K
Absolute Boiling Point332 K
Critical Presure10.34 MPa (102 Atm)
Critical Temperature588 K
Heat of Fusion5.8 kJ/mol
Heat of Vaporization14.8 kJ/mol
Heat of CombustionN/A
Specific Heat947.3 J/(kg K)[note]
Thermal Conductivity0.12 W/(m K)
Thermal ExpansionN/A

Bulk physical properties
Density3.12 g/cm3
Density (Liquid)3.12 g/cm3[note]
Molar Volume0.00002561
Bulk Modulus1.9 GPa
Refractive Index1.001132
Thermal Conductivity0.12 W/(m K)
Thermal ExpansionN/A

Reactivity
Valence7
Electronegativity2.96
ElectronAffinity324.6 kJ/mol
Ionization Energies
1139.9, 2103, 3470, 4560, 5760, 8550, 9940, 1.86×104 kJ/mol

Health and Safety
Autoignition PointN/A
Flashpoint-18 °C

Classifications
Alternate NamesNone
Nams of AllotropesDibromine
Blockp
Group17
Period4
Electron Configuration[Ar]3d104s24p5
ColorRed
Discovery
1826 in France
Gas phaseN/A
CAS NumberCAS7726-95-6

Electrical properties
Electrical TypeInsulator
Electrical Conductivity1×10-10 S/m
Resistivity1×1010 m Ω
Superconducting PointN/A

Magnetic properties
Magnetic TypeDiamagnetic
Curie PointN/A
Mass Magnetic Susceptibility-4.9×10-9
Molar Magnetic Susceptibility-3.92×10-10
Volume Magnetic Susceptibility-0.0000153

Abundances
% in Universe7×10-7%
% in SunN/A
% in Meteorites0.00012%
% in Earth's Crust0.0003%
% in Oceans0.0067%
% in Humans0.00029%

Atomic dimensions and structure
Atomic Radius94 pm
Covalent Radius114 pm
Van der Waals Radius185 pm
Crystal StructureBase Centered Orthorhombic
Lattice Angles
π/2, π/2, π/2
Lattice Constants
672.65, 464.51, 870.23 pm
Space Group NameCmca
Space Group Number64

Nuclear Properties
Half-LifeStable
LifetimeStable
Stable Isotopes
79Br, 81Br
Isotopic Abundances
79Br50.69%
81Br49.31%

Notes on the properties of Bromine:
Liquid Density: Value given at STP.
Specific Heat: Value given for liquid phase.