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Technical data for Bromine

Click any property name to see plots of that property for all the elements.

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 Pressure10.34 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]
Adiabatic IndexN/A
Neel PointN/A
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
Brinell HardnessN/A
Mohs HardnessN/A
Vickers HardnessN/A
Bulk Modulus1.9 GPa
Shear ModulusN/A
Young ModulusN/A
Poisson RatioN/A
Refractive Index1.001132
Speed of SoundN/A
Thermal Conductivity0.12 W/(m K)
Thermal ExpansionN/A

Reactivity
Valence5
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
Heat of CombustionN/A
DOT Hazard Class8
DOT Numbers1744
EU NumberN/A
NFPA Fire Rating0
NFPA Hazards
Oxidizing Agent
NFPA Health Rating3
NFPA Reactivity Rating0
RTECS NumberRTECSEF9100000
NFPA LabelNFPA Label

Classifications
Alternate NamesNone
Names of AllotropesDibromine
Blockp
Group17
Period4
Electron Configuration[Ar]3d104s24p5
ColorRed
Discovery
1826 in France
Gas phaseN/A
CAS NumberCAS7726-95-6
CID NumberCID24408
Gmelin NumberN/A
NSC NumberN/A
RTECS NumberRTECSEF9100000

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-7.83×10-10
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
Decay ModeN/A
Quantum Numbers2P3/2
Neutron Cross Section6.8
Neutron Mass Absorption0.002
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
79Br50.69%
81Br49.31%


Notes on the properties of Bromine:

Liquid Density: Value given at STP.

Specific Heat: Value given for liquid phase.

Up to date, curated data provided by
Mathematica's ElementData function from Wolfram Research, Inc.

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