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CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
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Technical data for Fluorine

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

Overview
NameFluorine
SymbolF
Atomic Number9
Atomic Weight18.9984032
Density1.696 g/l[note]
Melting Point-219.6 °C
Boiling Point-188.12 °C

Thermal properties
PhaseGas
Melting Point-219.6 °C
Boiling Point-188.12 °C
Absolute Melting Point53.5 K
Absolute Boiling Point85.03 K
Critical Pressure5.172 MPa (51.04 Atm)
Critical Temperature144.13 K
Heat of Fusion0.26 kJ/mol
Heat of Vaporization3.27 kJ/mol
Heat of CombustionN/A
Specific Heat824 J/(kg K)[note]
Adiabatic Index7/5
Neel PointN/A
Thermal Conductivity0.0277 W/(m K)
Thermal ExpansionN/A

Bulk physical properties
Density1.696 g/l[note]
Density (Liquid)N/A
Molar Volume0.011202
Brinell HardnessN/A
Mohs HardnessN/A
Vickers HardnessN/A
Bulk ModulusN/A
Shear ModulusN/A
Young ModulusN/A
Poisson RatioN/A
Refractive Index1.000195
Speed of SoundN/A
Thermal Conductivity0.0277 W/(m K)
Thermal ExpansionN/A

Reactivity
Valence1
Electronegativity3.98
ElectronAffinity328 kJ/mol
Ionization Energies
1681, 3374.2, 6050.4, 8407.7, 11022.7, 15164.1, 17868, 92038.1, 106434.3 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A
Heat of CombustionN/A
DOT Hazard Class2.3
DOT Numbers9192
EU NumberEU231-954-8
NFPA Fire Rating0
NFPA Hazards
Oxidizing Agent, Water Reactive
NFPA Health Rating4
NFPA Reactivity Rating4
RTECS NumberRTECSLM6475000
NFPA LabelNFPA Label

Classifications
Alternate NamesNone
Names of AllotropesDifluorine
Blockp
Group17
Period2
Electron Configuration[He]2s22p5
ColorColorless
Discovery
1886 in France
Gas phaseDiatomic
CAS NumberCAS7782-41-4
CID NumberCID24524
Gmelin NumberGmelin16281
NSC NumberN/A
RTECS NumberRTECSLM6475000

Electrical properties
Electrical TypeN/A
Electrical ConductivityN/A
ResistivityN/A
Superconducting PointN/A

Magnetic properties
Magnetic TypeN/A
Curie PointN/A
Mass Magnetic SusceptibilityN/A
Molar Magnetic SusceptibilityN/A
Volume Magnetic SusceptibilityN/A

Abundances
% in Universe0.00004%
% in Sun0.00005%
% in Meteorites0.0087%
% in Earth's Crust0.054%
% in Oceans0.00013%
% in Humans0.0037%

Atomic dimensions and structure
Atomic Radius42 pm
Covalent Radius71 pm
Van der Waals Radius147 pm
Crystal StructureBase Centered Monoclinic
Lattice Angles
π/2, π/2, π/2
Lattice Constants
550, 328, 728 pm
Space Group NameC12/c1
Space Group Number15

Nuclear Properties
Half-LifeStable
LifetimeStable
Decay ModeN/A
Quantum Numbers2P3/2
Neutron Cross Section0.0096
Neutron Mass Absorption0.00002
Known Isotopes
14F, 15F, 16F, 17F, 18F, 19F, 20F, 21F, 22F, 23F, 24F, 25F, 26F, 27F, 28F, 29F, 30F, 31F
Stable Isotopes
19F
Isotopic Abundances
19F100%


Notes on the properties of Fluorine:

Density: Density given for F at 0° Celsius. 2

Specific Heat: Value given for gas phase of F . 2

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

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