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9F

Fluorine

Halogen · 18.99840316 u · group 17, period 2

Fluorine · F

Identity

Atomic number9

SymbolF

CategoryHalogen

Standard stateGas

Group · Period · Block17 · 2 · p

Electron configuration[He]2s2 2p5

Atomic

Atomic mass18.99840316 u

Atomic radius135 pm

Protons / Neutrons / Electrons9 / 10 / 9

Shells (e⁻ per shell)2, 7

Chemical

Electronegativity (Pauling)3.98

Ionization energy17.423 eV

Electron affinity3.339 eV

Oxidation states-1

Physical

Melting point53.5 K · -219.6 °C

Boiling point85 K · -188.1 °C

Density0.0017 g/cm³

History

Year discovered1670

CPK color

#90E050

State at room temp (25 °C)

gas

Position

Molecules with F

28 in library

F₂

Hydrofluoric Acid

Xenon difluoride

Boron trifluoride

Nitrogen trifluoride

Chlorine trifluoride

Bromine trifluoride

Dichlorodifluoromethane

Trichlorofluoromethane

Chlorodifluoromethane

Silicon tetrafluoride

Sulfur tetrafluoride

Xenon tetrafluoride

Tetrafluoroethylene

C₂F₄

Phosphorus pentafluoride

Antimony pentafluoride

Iodine pentafluoride

Bromine pentafluoride

Sulfur Hexafluoride

Tungsten hexafluoride

Uranium hexafluoride

Xenon hexafluoride

Trifluoroacetic acid

Iodine heptafluoride

Hexafluorobenzene

C₆F₆

C₁₇H₁₈F₃NO

C₁₇H₁₈FN₃O₃

C₃₃H₃₅FN₂O₅

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