Template:Infobox fluorine

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9 oxygen ← fluorine → neon - ↑ F ↓ Cl Image:F-TableImage.png Periodic table - Extended periodic table
General
Name, symbol, number	fluorine, F, 9
Chemical series	halogens
Group, period, block	17, 2, p
Appearance	Yellowish brown gas Image:F,9.jpg
Standard atomic weight	18.9984032(5) g·mol−1
Electron configuration	1s2 2s2 2p5
Electrons per shell	2, 7
Physical properties
Phase	gas
Density	(0 °C, 101.325 kPa) 1.7 g/L
Melting point	53.53 K (-219.62 °C, -363.32 °F)
Boiling point	85.03 K (-188.12 °C, -306.62 °F)
Critical point	144.13 K, 5.172 MPa
Heat of fusion	(F2) 0.510 kJ·mol−1
Heat of vaporization	(F2) 6.62 kJ·mol−1
Heat capacity	(25 °C) (F2) 31.304 J·mol−1·K−1
Vapor pressure P/Pa 1 10 100 1 k 10 k 100 k at T/K 38 44 50 58 69 85
Atomic properties
Crystal structure	cubic
Oxidation states	−1 (strongly acidic oxide)
Electronegativity	3.98 (Pauling scale)
Ionization energies (more)	1st: 1681.0 kJ·mol−1
	2nd: 3374.2 kJ·mol−1
	3rd: 6050.4 kJ·mol−1
Atomic radius	50 pm
Atomic radius (calc.)	42 pm
Covalent radius	71 pm (see covalent radius of fluorine)
Van der Waals radius	147 pm
Miscellaneous
Magnetic ordering	nonmagnetic
Thermal conductivity	(300 K) 27.7 m W·m−1·K−1
CAS registry number	7782-41-4
Selected isotopes
Main article: Isotopes of fluorine iso NA half-life DM DE (MeV) DP 18F syn 109.77 min ε 1.656 18O 19F 100% F is stable with 10 neutrons
References
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