Template:Infobox fluorine

Fluorine,  9F
Template:Infobox element/symbol-to-top-image-alt
General properties
PronunciationTemplate:Infobox element/pronunciation
Allotropesalpha, beta
Appearancegas: very pale yellow
liquid: bright yellow
solid: alpha is opaque, beta is transparent
Standard atomic weight (Ar, standard)Template:Infobox element/standard atomic weight
Mass numberTemplate:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Fluorine in the periodic table
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Atomic number (Z)9
GroupTemplate:Infobox element/group
Periodperiod 2
Blockp-block
Element categoryTemplate:Infobox element/category format
Electron configuration[He] 2s2 2p5Template:Sfn
Electrons per shell
2, 7
Physical properties
Phase at STPgas
Melting point53.48 K ​(−219.67 °C, ​−363.41 °F)Template:Sfn
Boiling point85.03 K ​(−188.11 °C, ​−306.60 °F)Template:Sfn
Density (at STP)1.696 g/LTemplate:Sfn
when liquid (at b.p.)1.505 g/cm3Template:Sfn
Triple point53.48 K, ​90 kPaTemplate:Sfn
Critical point144.41 K, 5.1724 MPaTemplate:Sfn
[[Enthalpy of vaporization|Heat of Template:Engvar]]6.51 kJ/molTemplate:Sfn
Molar heat capacityCp: 31 J/(mol·K)Template:Sfn (at 21.1 °C)
Cv: 23 J/(mol·K)Template:Sfn (at 21.1 °C)
[[Vapor pressure|Template:Engvar pressure]]
Atomic properties
Oxidation statesTemplate:Infobox element/symbol-to-oxidation-state
ElectronegativityPauling scale: 3.98Template:Sfn
[[Ionization energy|Template:Engvar energies]]
Covalent radius64 pmTemplate:Sfn
Van der Waals radius135 pmTemplate:Sfn
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Other properties
Crystal structureTemplate:Infobox element/crystal structure
Thermal conductivity0.02591 W/(m·K)Template:Sfn
Magnetic orderingdiamagnetic (−1.2×10−4)Template:SfnTemplate:Sfn
CAS Number7782-41-4Template:Sfn
History
Namingafter the mineral fluorite, itself named after Latin fluo (to flow, in smelting)
DiscoveryAndré-Marie Ampère (1810)
First isolationHenri MoissanTemplate:Sfn (June 26, 1886)
Named byHumphry Davy
Main isotopes of fluorineTemplate:Sfn
Template:Infobox element/isotopes table
| references

Template:Infobox element/element navigation Template:Template reference list One of these is a named reference. It may be cited in the containing article as

  • <ref name="CIAAW2016" /> for the source Atomic weights of the elements 2013 (from subtemplates used by {{Infobox element}})

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